MySQL巩固半齐声多少个基本点参数搭配的测量检验

2019-09-20 06:11 来源:未知
  1 zlm@192.168.56.101:3306 [(none)]>stop slave;
  2 Query OK, 0 rows affected (0.03 sec)
  3 
  4 zlm@192.168.56.101:3306 [(none)]>show slave statusG
  5 *************************** 1. row ***************************
  6                Slave_IO_State: 
  7                   Master_Host: 192.168.56.100
  8                   Master_User: repl
  9                   Master_Port: 3306
 10                 Connect_Retry: 60
 11               Master_Log_File: mysql-bin.000091
 12           Read_Master_Log_Pos: 194
 13                Relay_Log_File: relay-bin.000031
 14                 Relay_Log_Pos: 407
 15         Relay_Master_Log_File: mysql-bin.000091
 16              Slave_IO_Running: No  //IO_Thread has stopped.
 17             Slave_SQL_Running: No  //SQL_Thread has stopped.
 18               Replicate_Do_DB: 
 19           Replicate_Ignore_DB: 
 20            Replicate_Do_Table: 
 21        Replicate_Ignore_Table: 
 22       Replicate_Wild_Do_Table: 
 23   Replicate_Wild_Ignore_Table: 
 24                    Last_Errno: 0
 25                    Last_Error: 
 26                  Skip_Counter: 0
 27           Exec_Master_Log_Pos: 194
 28               Relay_Log_Space: 861
 29               Until_Condition: None
 30                Until_Log_File: 
 31                 Until_Log_Pos: 0
 32            Master_SSL_Allowed: No
 33            Master_SSL_CA_File: 
 34            Master_SSL_CA_Path: 
 35               Master_SSL_Cert: 
 36             Master_SSL_Cipher: 
 37                Master_SSL_Key: 
 38         Seconds_Behind_Master: NULL
 39 Master_SSL_Verify_Server_Cert: No
 40                 Last_IO_Errno: 0
 41                 Last_IO_Error: 
 42                Last_SQL_Errno: 0
 43                Last_SQL_Error: 
 44   Replicate_Ignore_Server_Ids: 
 45              Master_Server_Id: 1003306
 46                   Master_UUID: 2a4b3562-2ab6-11e8-be7a-080027de0e0e
 47              Master_Info_File: /data/mysql/mysql3306/data/master.info
 48                     SQL_Delay: 0
 49           SQL_Remaining_Delay: NULL
 50       Slave_SQL_Running_State: 
 51            Master_Retry_Count: 86400
 52                   Master_Bind: 
 53       Last_IO_Error_Timestamp: 
 54      Last_SQL_Error_Timestamp: 
 55                Master_SSL_Crl: 
 56            Master_SSL_Crlpath: 
 57            Retrieved_Gtid_Set: 2a4b3562-2ab6-11e8-be7a-080027de0e0e:12715627
 58             Executed_Gtid_Set: 27af30ca-6800-11e8-ad7e-080027de0e0e:1,
 59 2a4b3562-2ab6-11e8-be7a-080027de0e0e:1-12715627
 60                 Auto_Position: 1
 61          Replicate_Rewrite_DB: 
 62                  Channel_Name: 
 63            Master_TLS_Version: 
 64 1 row in set (0.00 sec)
 65 
 66 //Wait for a while and check it again.
 67 
 68 zlm@192.168.56.101:3306 [(none)]>show slave statusG
 69 *************************** 1. row ***************************
 70                Slave_IO_State: Waiting for master to send event
 71                   Master_Host: 192.168.56.100
 72                   Master_User: repl
 73                   Master_Port: 3306
 74                 Connect_Retry: 60
 75               Master_Log_File: mysql-bin.000091
 76           Read_Master_Log_Pos: 194
 77                Relay_Log_File: relay-bin.000032
 78                 Relay_Log_Pos: 407
 79         Relay_Master_Log_File: mysql-bin.000091
 80              Slave_IO_Running: Yes //IO_Thread has started again.
 81             Slave_SQL_Running: Yes //SQL_Thread has started again.
 82               Replicate_Do_DB: 
 83           Replicate_Ignore_DB: 
 84            Replicate_Do_Table: 
 85        Replicate_Ignore_Table: 
 86       Replicate_Wild_Do_Table: 
 87   Replicate_Wild_Ignore_Table: 
 88                    Last_Errno: 0
 89                    Last_Error: 
 90                  Skip_Counter: 0
 91           Exec_Master_Log_Pos: 194
 92               Relay_Log_Space: 861
 93               Until_Condition: None
 94                Until_Log_File: 
 95                 Until_Log_Pos: 0
 96            Master_SSL_Allowed: No
 97            Master_SSL_CA_File: 
 98            Master_SSL_CA_Path: 
 99               Master_SSL_Cert: 
100             Master_SSL_Cipher: 
101                Master_SSL_Key: 
102         Seconds_Behind_Master: 0
103 Master_SSL_Verify_Server_Cert: No
104                 Last_IO_Errno: 0
105                 Last_IO_Error: 
106                Last_SQL_Errno: 0
107                Last_SQL_Error: 
108   Replicate_Ignore_Server_Ids: 
109              Master_Server_Id: 1003306
110                   Master_UUID: 2a4b3562-2ab6-11e8-be7a-080027de0e0e
111              Master_Info_File: /data/mysql/mysql3306/data/master.info
112                     SQL_Delay: 0
113           SQL_Remaining_Delay: NULL
114       Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
115            Master_Retry_Count: 86400
116                   Master_Bind: 
117       Last_IO_Error_Timestamp: 
118      Last_SQL_Error_Timestamp: 
119                Master_SSL_Crl: 
120            Master_SSL_Crlpath: 
121            Retrieved_Gtid_Set: 2a4b3562-2ab6-11e8-be7a-080027de0e0e:12715627
122             Executed_Gtid_Set: 27af30ca-6800-11e8-ad7e-080027de0e0e:1,
123 2a4b3562-2ab6-11e8-be7a-080027de0e0e:1-12715627
124                 Auto_Position: 1
125          Replicate_Rewrite_DB: 
126                  Channel_Name: 
127            Master_TLS_Version: 
128 1 row in set (0.00 sec)

 

**Set the variable "**rpl_semi_sync_master_timeout**" to 60000.**

**Common parameter**

what's show in error log of initiating SST/IST transfer operation on a new added node.

    Semi-synchronized replicatin can be installed as a plugin.There're a lot of variables with prefix of "repl_semi_sync" after you install the "rpl_semi_sync_master" plugin on your MySQL server.Meanwhile,there're a series of global status about it as well.Let's see the details about it.

 

 

 

**2.Test of skipping error of  replication.***

Hostname IP Port OS Version MySQL Version Xtrabackup version
zlm2 192.168.1.101 3308 CentOS 7.0 PXC 5.7.22 2.4.12 Linux (x86_64)
zlm3 192.168.1.102 3308 CentOS 7.0 PXC 5.7.22 2.4.12 Linux (x86_64)
zlm4 192.168.1.103 3308 CentOS 7.0 PXC 5.7.22 2.4.12 Linux (x86_64)

 

 1 zlm@192.168.56.101:3306 [zlm]>show slave statusG
 2 *************************** 1. row ***************************
 3                Slave_IO_State: Waiting for master to send event
 4                   Master_Host: 192.168.56.100
 5                   Master_User: repl
 6                   Master_Port: 3306
 7                 Connect_Retry: 60
 8               Master_Log_File: mysql-bin.000091
 9           Read_Master_Log_Pos: 1241
10                Relay_Log_File: relay-bin.000032
11                 Relay_Log_Pos: 1194
12         Relay_Master_Log_File: mysql-bin.000091
13              Slave_IO_Running: Yes
14             Slave_SQL_Running: No
15               Replicate_Do_DB: 
16           Replicate_Ignore_DB: 
17            Replicate_Do_Table: 
18        Replicate_Ignore_Table: 
19       Replicate_Wild_Do_Table: 
20   Replicate_Wild_Ignore_Table: 
21                    Last_Errno: 1677
22                    Last_Error: Column 1 of table 'zlm.test' cannot be converted from type 'varchar(30(bytes))' to type 'varchar(80(bytes) utf8mb4)'
23                  Skip_Counter: 0
24           Exec_Master_Log_Pos: 981
25               Relay_Log_Space: 1908
26               Until_Condition: None
27                Until_Log_File: 
28                 Until_Log_Pos: 0
29            Master_SSL_Allowed: No
30            Master_SSL_CA_File: 
31            Master_SSL_CA_Path: 
32               Master_SSL_Cert: 
33             Master_SSL_Cipher: 
34                Master_SSL_Key: 
35         Seconds_Behind_Master: NULL
36 Master_SSL_Verify_Server_Cert: No
37                 Last_IO_Errno: 0
38                 Last_IO_Error: 
39                Last_SQL_Errno: 1677
40                Last_SQL_Error: Column 1 of table 'zlm.test' cannot be converted from type 'varchar(30(bytes))' to type 'varchar(80(bytes) utf8mb4)'
41   Replicate_Ignore_Server_Ids: 
42              Master_Server_Id: 1003306
43                   Master_UUID: 2a4b3562-2ab6-11e8-be7a-080027de0e0e
44              Master_Info_File: /data/mysql/mysql3306/data/master.info
45                     SQL_Delay: 0
46           SQL_Remaining_Delay: NULL
47       Slave_SQL_Running_State: 
48            Master_Retry_Count: 86400
49                   Master_Bind: 
50       Last_IO_Error_Timestamp: 
51      Last_SQL_Error_Timestamp: 180721 13:50:42
52                Master_SSL_Crl: 
53            Master_SSL_Crlpath: 
54            Retrieved_Gtid_Set: 2a4b3562-2ab6-11e8-be7a-080027de0e0e:12715627-12715632
55             Executed_Gtid_Set: 27af30ca-6800-11e8-ad7e-080027de0e0e:1,
56 2a4b3562-2ab6-11e8-be7a-080027de0e0e:1-12715631
57                 Auto_Position: 1
58          Replicate_Rewrite_DB: 
59                  Channel_Name: 
60            Master_TLS_Version: 
61 1 row in set (0.00 sec)
62 
63 //Table "test" on master is utf8 menas its column varchar(10) contain 30 bytes
64 //Table "test" on slave is utf8mb4 means its column varchar(20) contain 80 bytes.
65 //They cannot be converted.Thus the error 1677 occurs.

 

 

 

 

 1 (zlm@192.168.1.101 3306)[(none)]>show global status like 'Rpl_semi_sync%';
 2  -------------------------------------------- ------------ 
 3 | Variable_name                              | Value      |
 4  -------------------------------------------- ------------ 
 5 | Rpl_semi_sync_master_clients               | 1          | //The amount of client turned into "1".
 6 | Rpl_semi_sync_master_net_avg_wait_time     | 0          |
 7 | Rpl_semi_sync_master_net_wait_time         | 0          |
 8 | Rpl_semi_sync_master_net_waits             | 3975124    |
 9 | Rpl_semi_sync_master_no_times              | 9          |
10 | Rpl_semi_sync_master_no_tx                 | 1788275    |
11 | Rpl_semi_sync_master_status                | ON         | //Although the amount of client has been less than "slave_count" but it still work in semi-sync mode.
12 | Rpl_semi_sync_master_timefunc_failures     | 0          |
13 | Rpl_semi_sync_master_tx_avg_wait_time      | 1860       |
14 | Rpl_semi_sync_master_tx_wait_time          | 1368916900 |
15 | Rpl_semi_sync_master_tx_waits              | 735759     |
16 | Rpl_semi_sync_master_wait_pos_backtraverse | 0          |
17 | Rpl_semi_sync_master_wait_sessions         | 1          |
18 | Rpl_semi_sync_master_yes_tx                | 803390     |
19  -------------------------------------------- ------------ 
20 14 rows in set (0.00 sec)
21 
22 2018-07-16T11:20:39.628398 01:00 0 [ERROR] mysqld: Got an error reading communication packets //It's the time I stopped the slave on slave1.
23 2018-07-16T11:20:40.355498 01:00 54 [ERROR] Semi-sync master failed on net_flush() before waiting for slave reply
24 2018-07-16T11:20:40.355532 01:00 54 [Note] Stop semi-sync binlog_dump to slave (server_id: 1023306)
25 2018-07-16T11:20:41.358003 01:00 54 [Note] Aborted connection 54 to db: 'unconnected' user: 'repl' host: 'zlm3' (Found net error)
26 2018-07-16T11:20:43.367327 01:00 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 6128ms. The settings might not be optimal. (flushed=700 and evicted=0, during the time.)
27 2018-07-16T11:20:59.683904 01:00 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 15315ms. The settings might not be optimal. (flushed=2000 and evicted=0, during the time.)
28 2018-07-16T11:21:05.709621 01:00 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 5025ms. The settings might not be optimal. (flushed=731 and evicted=0, during the time.)
29 2018-07-16T11:21:40.353597 01:00 57 [Warning] Timeout waiting for reply of binlog (file: mysql-bin.000008, pos: 61052572), semi-sync up to file mysql-bin.000008, position 61052134.
30 2018-07-16T11:21:40.353630 01:00 57 [Note] Semi-sync replication switched OFF. //Until the timeout was accumulated to 60s(11:21:40),the semi-sync mode reverts "OFF" what means the master work as asynchronous replication.
31 
32 (zlm@192.168.1.101 3306)[(none)]>show global status like 'Rpl_semi_sync%';
33  -------------------------------------------- ------------ 
34 | Variable_name                              | Value      |
35  -------------------------------------------- ------------ 
36 | Rpl_semi_sync_master_clients               | 1          |
37 | Rpl_semi_sync_master_net_avg_wait_time     | 0          |
38 | Rpl_semi_sync_master_net_wait_time         | 0          |
39 | Rpl_semi_sync_master_net_waits             | 4003361    |
40 | Rpl_semi_sync_master_no_times              | 10         |
41 | Rpl_semi_sync_master_no_tx                 | 1826027    |
42 | Rpl_semi_sync_master_status                | OFF        | //Now the status became "OFF".
43 | Rpl_semi_sync_master_timefunc_failures     | 0          |
44 | Rpl_semi_sync_master_tx_avg_wait_time      | 1860       |
45 | Rpl_semi_sync_master_tx_wait_time          | 1368916900 |
46 | Rpl_semi_sync_master_tx_waits              | 735759     |
47 | Rpl_semi_sync_master_wait_pos_backtraverse | 0          |
48 | Rpl_semi_sync_master_wait_sessions         | 0          |
49 | Rpl_semi_sync_master_yes_tx                | 803390     |
50  -------------------------------------------- ------------ 
51 14 rows in set (0.00 sec)

 

 1 [root@zlm4 11:07:38 /data/mysql/mysql3308/data]
 2 #vim grastate.dat
 3 
 4 [root@zlm4 11:08:01 /data/mysql/mysql3308/data]
 5 #cat grastate.dat 
 6 #cat grastate.dat
 7 # GALERA saved state
 8 version: 2.1
 9 uuid:    bd5525ab-9a15-11e8-aa0f-4b830c783fc7
10 seqno:   28
11 safe_to_bootstrap: 0
12 
13 [root@zlm4 11:08:42 /data/mysql/mysql3308/data]
14 #ls -l|grep grastate.dat 
15 -rw-r--r-- 1 root  root        131 Aug  9 11:08 grastate.dat
16 
17 [root@zlm4 11:08:03 /data/mysql/mysql3308/data]
18 #chown mysql.mysql grastate.dat 
19 
20 [root@zlm4 11:08:11 /data/mysql/mysql3308/data]
21 #ls -l|grep grastate.dat 
22 -rw-r--r-- 1 mysql mysql       131 Aug  9 11:08 grastate.dat
Hostname IP/Port Identity OS Version MySQL Version GTID Mode Binlog Format Semi-Sync status
zlm2 192.168.1.101/3306 master CentOS 7.0 5.7.21 on row on
zlm3 192.168.1.102/3306 slave1 CentOS 7.0 5.7.21 on row on
zlm4 192.168.1.103/3306 slave2 CentOS 7.0 5.7.21 on row on

Preface

Analyze the binlog file we get above(here is mysql-bin.000023).

 

Check replicaiton slave status again.

 1 [root@zlm4 10:05:33 /data/mysql/mysql3308]
 2 #cat my3308.cnf |grep wsrep
 3 #loose-wsrep_cluster_name=pxc_wubx 
 4 #loose-wsrep_cluster_address=gcomm://192.168.1.101,192.168.1.102,192.168.1.103
 5 #loose-wsrep_node_address=192.168.1.103
 6 #loose-wsrep_provider=/usr/local/mysql/lib/libgalera_smm.so
 7 #loose-wsrep_sst_method=xtrabackup-v2
 8 #loose-wsrep_sst_method=rsync
 9 #loose-wsrep_sst_auth=sst:zlmzlm
10 #loose-wsrep_debug=on
11 #loose-wsrep_provider_options="debug=on"
12 
13 [root@zlm4 10:08:04 /data/mysql/mysql3308]
14 #mysqld --defaults-file=/data/mysql/mysql3308/my3308.cnf &
15 [1] 6094
16 
17 [root@zlm4 10:08:07 /data/mysql/mysql3308]
18 #!ps
19 ps aux|grep mysqld
20 mysql     6094 24.3 17.9 1238476 182592 pts/0  Sl   10:08   0:00 mysqld --defaults-file=/data/mysql/mysql3308/my3308.cnf
21 root      6128  0.0  0.0 112640   956 pts/0    R    10:08   0:00 grep --color=auto mysqld

Stop slave on slave1 again and record the execution time.

 

 1 [root@zlm4 09:43:26 /data/backup]
 2 #innobackupex --apply-log /data/backup/2018-08-09_09-26-05/
 3 xtrabackup: recognized server arguments: --innodb_checksum_algorithm=crc32 --innodb_log_checksum_algorithm=strict_crc32 --innodb_data_file_path=ibdata1:100M:autoextend --innodb_log_files_in_group=3 --innodb_log_file_size=104857600 --innodb_fast_checksum=0 --innodb_page_size=16384 --innodb_log_block_size=512 --innodb_undo_directory=./ --innodb_undo_tablespaces=0 --server-id=1023308 --redo-log-version=1 --innodb_buffer_pool_filename=ib_buffer_pool 
 4 xtrabackup: recognized client arguments: --innodb_checksum_algorithm=crc32 --innodb_log_checksum_algorithm=strict_crc32 --innodb_data_file_path=ibdata1:100M:autoextend --innodb_log_files_in_group=3 --innodb_log_file_size=104857600 --innodb_fast_checksum=0 --innodb_page_size=16384 --innodb_log_block_size=512 --innodb_undo_directory=./ --innodb_undo_tablespaces=0 --server-id=1023308 --redo-log-version=1 --innodb_buffer_pool_filename=ib_buffer_pool 
 5 180809 09:45:56 innobackupex: Starting the apply-log operation
 6 
 7 ... //Omitted.
 8 
 9 InnoDB: Waiting for purge to start
10 InnoDB: 5.7.19 started; log sequence number 2627605
11 xtrabackup: starting shutdown with innodb_fast_shutdown = 1
12 InnoDB: page_cleaner: 1000ms intended loop took 17036ms. The settings might not be optimal. (flushed=0 and evicted=0, during the time.)
13 InnoDB: FTS optimize thread exiting.
14 InnoDB: Starting shutdown...
15 InnoDB: Shutdown completed; log sequence number 2627624
16 180809 09:46:17 completed OK!
17 
18 [root@zlm4 09:52:44 /data/mysql/mysql3308/data]
19 #ls -l
20 total 540792
21 -rw-r----- 1 mysql mysql        56 Aug  9 08:00 auto.cnf
22 -rw------- 1 mysql mysql      1680 Aug  9 08:00 ca-key.pem
23 -rw-r--r-- 1 mysql mysql      1120 Aug  9 08:00 ca.pem
24 -rw-r--r-- 1 mysql mysql      1120 Aug  9 08:00 client-cert.pem
25 -rw------- 1 mysql mysql      1680 Aug  9 08:00 client-key.pem
26 -rw-r----- 1 mysql mysql     38775 Aug  9 09:02 error.log
27 -rw-r----- 1 mysql mysql 134219048 Aug  9 09:02 galera.cache
28 -rw-r----- 1 mysql mysql       113 Aug  9 09:02 grastate.dat
29 -rw-r----- 1 mysql mysql       280 Aug  9 09:02 ib_buffer_pool
30 -rw-r----- 1 mysql mysql 104857600 Aug  9 09:02 ibdata1
31 -rw-r----- 1 mysql mysql 104857600 Aug  9 09:02 ib_logfile0
32 -rw-r----- 1 mysql mysql 104857600 Aug  9 08:00 ib_logfile1
33 -rw-r----- 1 mysql mysql 104857600 Aug  9 08:00 ib_logfile2
34 drwxr-x--- 2 mysql mysql      4096 Aug  9 08:00 mysql
35 drwxr-x--- 2 mysql mysql      8192 Aug  9 08:00 performance_schema
36 -rw------- 1 mysql mysql      1676 Aug  9 08:00 private_key.pem
37 -rw-r--r-- 1 mysql mysql       452 Aug  9 08:00 public_key.pem
38 -rw-r--r-- 1 mysql mysql      1120 Aug  9 08:00 server-cert.pem
39 -rw------- 1 mysql mysql      1676 Aug  9 08:00 server-key.pem
40 -rw-r----- 1 mysql mysql       227 Aug  9 08:00 slow.log
41 drwxr-x--- 2 mysql mysql      8192 Aug  9 08:00 sys
42 
43 [root@zlm4 09:57:51 /data/mysql/mysql3308/data]
44 #rm -rf *
45 
46 [root@zlm4 09:59:35 /data/mysql/mysql3308/data]
47 #innobackupex --defaults-file=/data/mysql/mysql3308/my3308.cnf --copy-back /data/backup/2018-08-09_09-26-05/
48 xtrabackup: recognized server arguments: --datadir=/data/mysql/mysql3308/data --server-id=1033308 --open_files_limit=65536 --log_bin=/data/mysql/mysql3308/logs/mysql-bin --innodb_data_file_path=ibdata1:100M:autoextend --innodb_buffer_pool_filename=ib_buffer_pool --innodb_log_files_in_group=3 --innodb_log_file_size=100M --innodb_file_per_table=1 --innodb_open_files=65535 --innodb_page_size=16k --innodb_read_io_threads=4 --innodb_write_io_threads=4 --innodb_io_capacity=200 --innodb_doublewrite=1 --innodb_log_buffer_size=128M --innodb_flush_log_at_trx_commit=1 --innodb_buffer_pool_size=100M --innodb_flush_method=O_DIRECT 
49 xtrabackup: recognized client arguments: --datadir=/data/mysql/mysql3308/data --server-id=1033308 --open_files_limit=65536 --log_bin=/data/mysql/mysql3308/logs/mysql-bin --innodb_data_file_path=ibdata1:100M:autoextend --innodb_buffer_pool_filename=ib_buffer_pool --innodb_log_files_in_group=3 --innodb_log_file_size=100M --innodb_file_per_table=1 --innodb_open_files=65535 --innodb_page_size=16k --innodb_read_io_threads=4 --innodb_write_io_threads=4 --innodb_io_capacity=200 --innodb_doublewrite=1 --innodb_log_buffer_size=128M --innodb_flush_log_at_trx_commit=1 --innodb_buffer_pool_size=100M --innodb_flush_method=O_DIRECT 
50 180809 10:00:09 innobackupex: Starting the copy-back operation
51 
52 [root@zlm4 10:01:16 /data/mysql/mysql3308/data]
53 #ls -l
54 total 421936
55 -rw-r----- 1 root root       293 Aug  9 10:00 ib_buffer_pool
56 -rw-r----- 1 root root 104857600 Aug  9 10:00 ibdata1
57 -rw-r----- 1 root root 104857600 Aug  9 10:00 ib_logfile0
58 -rw-r----- 1 root root 104857600 Aug  9 10:00 ib_logfile1
59 -rw-r----- 1 root root 104857600 Aug  9 10:00 ib_logfile2
60 -rw-r----- 1 root root  12582912 Aug  9 10:00 ibtmp1
61 drwxr-x--- 2 root root      4096 Aug  9 10:00 mysql
62 drwxr-x--- 2 root root      8192 Aug  9 10:00 performance_schema
63 drwxr-x--- 2 root root      8192 Aug  9 10:00 sys
64 -rw-r----- 1 root root        22 Aug  9 10:00 xtrabackup_binlog_pos_innodb
65 -rw-r----- 1 root root        39 Aug  9 10:00 xtrabackup_galera_info
66 -rw-r----- 1 root root       650 Aug  9 10:00 xtrabackup_info
67 -rw-r----- 1 root root         1 Aug  9 10:00 xtrabackup_master_key_id
68 drwxr-x--- 2 root root        45 Aug  9 10:00 zlm
69 
70 [root@zlm4 10:02:23 /data/mysql/mysql3308/data]
71 #chown -R mysql.mysql *

 

    Sometimes,the threads(especially the SQL_Thread) will be terminated by accident.The slave will stop until we fix the relevant error or just skip them.There's many methods we can use to solve these kind of issues.For example,we can set "sql_salve_skip_counter" in mysql client and we can set "slave_skip_errors" in my.cnf as well(static parameter,need to restart mysqld).Further more,set "slave_exec_mode=idempotent" may also be useful.It can skip the "duplicate-key" or "no-key-found" errors.It means that we don't need to pay more attention to error 1062 and 1032 any more if we do so.Is there any other method can solve these skipping error issues?Surely there is one.

    When we add a new node into PXC structure,it will estimate the mothed(IST/SST) to transfer data to the new node.It's no wonder that sst will be automatically choosed.What if a dropped node in PXC by accident want to rejoin the cluster?Especially it has been a long period of time after it was dropped out.We should avoid starting up the node directly.As the SST(either xtrabackup-v2 or rsync mode) will be choosed to resynchronize the dropped node instead of IST.Generally speaking,SST may cause to decline the perormance of the whole cluster.It's recommend to use another way to deal with that kind of issue.That is,slave replication.

 

**Stop slave replication.**

 1 [root@zlm3 09:07:05 /data/mysql/mysql3308/data]
 2 #mysql -uzlm -pzlmzlm -h192.168.1.102 -P3308
 3 mysql: [Warning] Using a password on the command line interface can be insecure.
 4 Welcome to the MySQL monitor.  Commands end with ; or g.
 5 Your MySQL connection id is 5
 6 Server version: 5.7.22-22-29.26-log Percona XtraDB Cluster binary (GPL) 5.7.22-29.26, Revision da86071, wsrep_29.26
 7 
 8 Copyright (c) 2009-2018 Percona LLC and/or its affiliates
 9 Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
10 
11 Oracle is a registered trademark of Oracle Corporation and/or its
12 affiliates. Other names may be trademarks of their respective
13 owners.
14 
15 Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
16 
17 (zlm@192.168.1.102 3308)[(none)]>show databases;
18  -------------------- 
19 | Database           |
20  -------------------- 
21 | information_schema |
22 | mysql              |
23 | performance_schema |
24 | sys                |
25  -------------------- 
26 4 rows in set (0.01 sec)
27 
28 (zlm@192.168.1.102 3308)[(none)]>create database zlm;
29 Query OK, 1 row affected (0.01 sec)
30 
31 (zlm@192.168.1.102 3308)[(none)]>use zlm;
32 Database changed
33 (zlm@192.168.1.102 3308)[zlm]>create table t1(
34     -> id int,
35     -> name char(10)
36     -> ) engine=innodb charset=utf8mb4;
37 Query OK, 0 rows affected (0.04 sec)
38 
39 (zlm@192.168.1.102 3308)[zlm]>insert into t1 values(1,'MySQL'),(2,'Oracle'),(3,'PostgreSQL');
40 ERROR 1105 (HY000): Percona-XtraDB-Cluster prohibits use of DML command on a table (zlm.t1) without an explicit primary key with pxc_strict_mode = ENFORCING or MASTER //DML of tables need explicit primary key in PXC.
41 (zlm@192.168.1.102 3308)[zlm]>alter table t1 add primary key(id);
42 Query OK, 0 rows affected (0.08 sec)
43 Records: 0  Duplicates: 0  Warnings: 0
44 
45 (zlm@192.168.1.102 3308)[zlm]>insert into t1 values(1,'MySQL'),(2,'Oracle'),(3,'PostgreSQL');
46 Query OK, 3 rows affected (0.01 sec)
47 Records: 3  Duplicates: 0  Warnings: 0
48 
49 (zlm@192.168.1.102 3308)[zlm]>select * from t1;
50  ---- ------------ 
51 | id | name       |
52  ---- ------------ 
53 |  1 | MySQL      |
54 |  2 | Oracle     |
55 |  3 | PostgreSQL |
56  ---- ------------ 
57 3 rows in set (0.00 sec)

 

1 [root@zlm1 13:18:45 ~]
2 #pt-slave-restart --recurse=0 --error-number=1051 -h192.168.56.101 -P3306 -urepl -prepl4slave
3 2018-07-21T13:35:31 P=3306,h=192.168.56.101,p=...,u=repl relay-bin.000032         407 1051 
4 2018-07-21T13:35:31 P=3306,h=192.168.56.101,p=...,u=repl relay-bin.000032         618 1050 
5 Error 1050 is not in --error-numbers. //error 1050 occurs then.

 

 

 

**Stop slave and check the value of  "Relay_Master_Log_File**","**Exec_Master_Log_Pos**" and "**Retrieved_Gtid_Set**".**

 1 [root@zlm2 09:45:08 ~/sysbench-1.0/src/lua]
 2 #sysbench oltp_insert.lua --mysql-host=192.168.1.101 --mysql-port=3306 --mysql-user=zlm --mysql-password=zlmzlm --mysql-db=sysbench --tables=5 --table-size=10000 --mysql-storage-engine=innodb prepare
 3 sysbench 1.0.15 (using bundled LuaJIT 2.1.0-beta2)
 4 
 5 Creating table 'sbtest1'...
 6 Inserting 10000 records into 'sbtest1'
 7 Creating a secondary index on 'sbtest1'...
 8 Creating table 'sbtest2'...
 9 Inserting 10000 records into 'sbtest2'
10 Creating a secondary index on 'sbtest2'...
11 Creating table 'sbtest3'...
12 Inserting 10000 records into 'sbtest3'
13 Creating a secondary index on 'sbtest3'...
14 Creating table 'sbtest4'...
15 Inserting 10000 records into 'sbtest4'
16 Creating a secondary index on 'sbtest4'...
17 Creating table 'sbtest5'...
18 Inserting 10000 records into 'sbtest5'
19 Creating a secondary index on 'sbtest5'...
20 
21 [root@zlm2 09:45:22 ~/sysbench-1.0/src/lua]
22 #sysbench oltp_insert.lua --mysql-host=192.168.1.101 --mysql-port=3306 --mysql-user=zlm --mysql-password=zlmzlm --mysql-db=sysbench --threads=3 --time=1200 --report-interval=30 --rand-type=uniform run
23 sysbench 1.0.15 (using bundled LuaJIT 2.1.0-beta2)
24 
25 Running the test with following options:
26 Number of threads: 3
27 Report intermediate results every 30 second(s)
28 Initializing random number generator from current time
29 
30 
31 Initializing worker threads...
32 
33 Threads started!
34 
35 [ 30s ] thds: 3 tps: 931.95 qps: 931.95 (r/w/o: 0.00/931.95/0.00) lat (ms,95%): 6.09 err/s: 0.00 reconn/s: 0.00
36 [ 60s ] thds: 3 tps: 971.62 qps: 971.62 (r/w/o: 0.00/971.62/0.00) lat (ms,95%): 5.18 err/s: 0.00 reconn/s: 0.00
37 [ 90s ] thds: 3 tps: 949.33 qps: 949.33 (r/w/o: 0.00/949.33/0.00) lat (ms,95%): 4.41 err/s: 0.00 reconn/s: 0.00

Procedure

**Copy the backup set to node zlm4.**

**Start slave on slave1 to restore the initial status of semi-sync replication.**

**Continue to skip error 1050 on master.**

**Reset slave replication information on node zlm4.(optional)**

 

**The output is added one line which shows the connection status of slave on master.**

 1 (zlm@192.168.1.101 3308)[(none)]>show global status like '%wsrep%';
 2  ---------------------------------- ---------------------------------------------------------- 
 3 | Variable_name                    | Value                                                    |
 4  ---------------------------------- ---------------------------------------------------------- 
 5 | wsrep_local_state_uuid           | bd5525ab-9a15-11e8-aa0f-4b830c783fc7                     |
 6 | wsrep_protocol_version           | 8                                                        |
 7 | wsrep_last_applied               | 22                                                       |
 8 | wsrep_last_committed             | 22                                                       |
 9 | wsrep_replicated                 | 0                                                        |
10 | wsrep_replicated_bytes           | 0                                                        |
11 | wsrep_repl_keys                  | 0                                                        |
12 | wsrep_repl_keys_bytes            | 0                                                        |
13 | wsrep_repl_data_bytes            | 0                                                        |
14 | wsrep_repl_other_bytes           | 0                                                        |
15 | wsrep_received                   | 21                                                       |
16 | wsrep_received_bytes             | 2733                                                     |
17 | wsrep_local_commits              | 0                                                        |
18 | wsrep_local_cert_failures        | 0                                                        |
19 | wsrep_local_replays              | 0                                                        |
20 | wsrep_local_send_queue           | 0                                                        |
21 | wsrep_local_send_queue_max       | 1                                                        |
22 | wsrep_local_send_queue_min       | 0                                                        |
23 | wsrep_local_send_queue_avg       | 0.000000                                                 |
24 | wsrep_local_recv_queue           | 0                                                        |
25 | wsrep_local_recv_queue_max       | 2                                                        |
26 | wsrep_local_recv_queue_min       | 0                                                        |
27 | wsrep_local_recv_queue_avg       | 0.047619                                                 |
28 | wsrep_local_cached_downto        | 0                                                        |
29 | wsrep_flow_control_paused_ns     | 0                                                        |
30 | wsrep_flow_control_paused        | 0.000000                                                 |
31 | wsrep_flow_control_sent          | 0                                                        |
32 | wsrep_flow_control_recv          | 0                                                        |
33 | wsrep_flow_control_interval      | [ 173, 173 ]                                             |
34 | wsrep_flow_control_interval_low  | 173                                                      |
35 | wsrep_flow_control_interval_high | 173                                                      |
36 | wsrep_flow_control_status        | OFF                                                      |
37 | wsrep_cert_deps_distance         | 0.000000                                                 |
38 | wsrep_apply_oooe                 | 0.000000                                                 |
39 | wsrep_apply_oool                 | 0.000000                                                 |
40 | wsrep_apply_window               | 0.000000                                                 |
41 | wsrep_commit_oooe                | 0.000000                                                 |
42 | wsrep_commit_oool                | 0.000000                                                 |
43 | wsrep_commit_window              | 0.000000                                                 |
44 | wsrep_local_state                | 4                                                        |
45 | wsrep_local_state_comment        | Synced                                                   |
46 | wsrep_cert_index_size            | 0                                                        |
47 | wsrep_cert_bucket_count          | 22                                                       |
48 | wsrep_gcache_pool_size           | 1712                                                     |
49 | wsrep_causal_reads               | 0                                                        |
50 | wsrep_cert_interval              | 0.000000                                                 |
51 | wsrep_ist_receive_status         |                                                          |
52 | wsrep_ist_receive_seqno_start    | 0                                                        |
53 | wsrep_ist_receive_seqno_current  | 0                                                        |
54 | wsrep_ist_receive_seqno_end      | 0                                                        |
55 | wsrep_incoming_addresses         | 192.168.1.101:3308,192.168.1.102:3308,192.168.1.103:3308 |
56 | wsrep_desync_count               | 0                                                        |
57 | wsrep_evs_delayed                |                                                          |
58 | wsrep_evs_evict_list             |                                                          |
59 | wsrep_evs_repl_latency           | 0/0/0/0/0                                                |
60 | wsrep_evs_state                  | OPERATIONAL                                              |
61 | wsrep_gcomm_uuid                 | 13eae368-9b79-11e8-9053-338307f4c6cc                     |
62 | wsrep_cluster_conf_id            | 11                                                       |
63 | wsrep_cluster_size               | 3                                                        | //It means I've got three nodes in PXC.
64 | wsrep_cluster_state_uuid         | bd5525ab-9a15-11e8-aa0f-4b830c783fc7                     |
65 | wsrep_cluster_status             | Primary                                                  |
66 | wsrep_connected                  | ON                                                       |
67 | wsrep_local_bf_aborts            | 0                                                        |
68 | wsrep_local_index                | 0                                                        |
69 | wsrep_provider_name              | Galera                                                   |
70 | wsrep_provider_vendor            | Codership Oy <info@codership.com>                        |
71 | wsrep_provider_version           | 3.26(r)                                                  |
72 | wsrep_ready                      | ON                                                       |
73  ---------------------------------- ---------------------------------------------------------- 
74 68 rows in set (0.00 sec)
1 (zlm@192.168.1.102 3306)[(none)]>system date
2 Mon Jul 16 11:20:37 CEST 2018
3 (zlm@192.168.1.102 3306)[(none)]>stop slave; //The stopping time was 11:20:40 around.
4 Query OK, 0 rows affected (0.84 sec)

Execute pt-slave-restart with "--always".

  1 [root@zlm4 11:17:09 /data/mysql/mysql3308]
  2 #!ps
  3 ps aux|grep mysqld
  4 mysql     6514 12.0 19.1 1256144 194664 pts/3  Dl   11:17   0:00 mysqld --defaults-file=/data/mysql/mysql3308/my3308.cnf
  5 root      6539  0.0  0.0 112640   960 pts/3    R    11:17   0:00 grep --color=auto mysqld
  6 
  7 //Check the error log for detail.
  8 [root@zlm4 11:17:01 /data/mysql/mysql3308/data]
  9 #tail -f error.log 
 10 
 11 2018-08-09T11:17:09.518383 01:00 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
 12 2018-08-09T11:17:09.519740 01:00 0 [Warning] Insecure configuration for --secure-file-priv: Location is accessible to all OS users. Consider choosing a different directory.
 13 2018-08-09T11:17:09.519805 01:00 0 [Note] mysqld (mysqld 5.7.22-22-29.26-log) starting as process 6514 ...
 14 2018-08-09T11:17:09.522792 01:00 0 [Note] WSREP: Setting wsrep_ready to false
 15 2018-08-09T11:17:09.522812 01:00 0 [Note] WSREP: No pre-stored wsrep-start position found. Skipping position initialization.
 16 2018-08-09T11:17:09.522818 01:00 0 [Note] WSREP: wsrep_load(): loading provider library '/usr/local/mysql/lib/libgalera_smm.so'
 17 2018-08-09T11:17:09.528196 01:00 0 [Note] WSREP: wsrep_load(): Galera 3.26(r) by Codership Oy <info@codership.com> loaded successfully.
 18 2018-08-09T11:17:09.528328 01:00 0 [Note] WSREP: CRC-32C: using hardware acceleration.
 19 2018-08-09T11:17:09.528860 01:00 0 [Note] WSREP: Found saved state: bd5525ab-9a15-11e8-aa0f-4b830c783fc7:28, safe_to_bootstrap: 0
 20 2018-08-09T11:17:09.534206 01:00 0 [Note] WSREP: Passing config to GCS: base_dir = /data/mysql/mysql3308/data/; base_host = 192.168.1.103; base_port = 4567; cert.log_conflicts = no; debug = no; evs.auto_evict = 0; evs.delay_margin = PT1S; evs.delayed_keep_period = PT30S; evs.inactive_check_period = PT0.5S; evs.inactive_timeout = PT15S; evs.join_retrans_period = PT1S; evs.max_install_timeouts = 3; evs.send_window = 10; evs.stats_report_period = PT1M; evs.suspect_timeout = PT5S; evs.user_send_window = 4; evs.view_forget_timeout = PT24H; gcache.dir = /data/mysql/mysql3308/data/; gcache.freeze_purge_at_seqno = -1; gcache.keep_pages_count = 0; gcache.keep_pages_size = 0; gcache.mem_size = 0; gcache.name = /data/mysql/mysql3308/data//galera.cache; gcache.page_size = 128M; gcache.recover = no; gcache.size = 128M; gcomm.thread_prio = ; gcs.fc_debug = 0; gcs.fc_factor = 1; gcs.fc_limit = 100; gcs.fc_master_slave = no; gcs.max_packet_size = 64500; gcs.max_throttle = 0.25; gcs.recv_q_hard_limit = 9223372036854775807; gcs.recv_q_soft_limit = 0.25; gcs.sync_donor = no; gmcast.segment = 0; gmcast.version = 0; pc.announce_timeout = PT3S; pc.checksum = false; pc.ignore_quorum = false; pc.ignore_sb = false; pc.npvo = false; pc.recovery = 1; pc.version = 0; pc.wait_prim = true; pc.wait_prim_timeout = PT30S; pc.weight = 1; protonet.backend = asio; protonet.version = 0; repl.causal_read_timeout = PT30S; repl.commit_order = 3; repl.key_format = FLAT8; repl.max_ws_size = 2147483647; repl.proto_max = 8; socket.checksum = 2; socket.recv_buf_size = 212992; 
 21 2018-08-09T11:17:09.547103 01:00 0 [Note] WSREP: GCache history reset: bd5525ab-9a15-11e8-aa0f-4b830c783fc7:0 -> bd5525ab-9a15-11e8-aa0f-4b830c783fc7:28
 22 2018-08-09T11:17:09.551477 01:00 0 [Note] WSREP: Assign initial position for certification: 28, protocol version: -1
 23 2018-08-09T11:17:09.551517 01:00 0 [Note] WSREP: Preparing to initiate SST/IST
 24 2018-08-09T11:17:09.551524 01:00 0 [Note] WSREP: Starting replication
 25 2018-08-09T11:17:09.551542 01:00 0 [Note] WSREP: Setting initial position to bd5525ab-9a15-11e8-aa0f-4b830c783fc7:28
 26 2018-08-09T11:17:09.551666 01:00 0 [Note] WSREP: Using CRC-32C for message checksums.
 27 2018-08-09T11:17:09.551752 01:00 0 [Note] WSREP: gcomm thread scheduling priority set to other:0 
 28 2018-08-09T11:17:09.551861 01:00 0 [Warning] WSREP: Fail to access the file (/data/mysql/mysql3308/data//gvwstate.dat) error (No such file or directory). It is possible if node is booting for first time or re-booting after a graceful shutdown
 29 2018-08-09T11:17:09.551870 01:00 0 [Note] WSREP: Restoring primary-component from disk failed. Either node is booting for first time or re-booting after a graceful shutdown
 30 2018-08-09T11:17:09.552488 01:00 0 [Note] WSREP: GMCast version 0
 31 2018-08-09T11:17:09.553245 01:00 0 [Note] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') listening at tcp://0.0.0.0:4567
 32 2018-08-09T11:17:09.553297 01:00 0 [Note] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') multicast: , ttl: 1
 33 2018-08-09T11:17:09.553883 01:00 0 [Note] WSREP: EVS version 0
 34 2018-08-09T11:17:09.554031 01:00 0 [Note] WSREP: gcomm: connecting to group 'pxc_wubx', peer '192.168.1.101:,192.168.1.102:,192.168.1.103:'
 35 2018-08-09T11:17:09.555884 01:00 0 [Note] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') connection established to fe2c0efc tcp://192.168.1.103:4567
 36 2018-08-09T11:17:09.555917 01:00 0 [Warning] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') address 'tcp://192.168.1.103:4567' points to own listening address, blacklisting
 37 2018-08-09T11:17:09.557320 01:00 0 [Note] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') connection established to 13eae368 tcp://192.168.1.101:4567
 38 2018-08-09T11:17:09.557398 01:00 0 [Note] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') turning message relay requesting on, nonlive peers: 
 39 2018-08-09T11:17:09.558019 01:00 0 [Note] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') connection established to 23fb8f7a tcp://192.168.1.102:4567
 40 2018-08-09T11:17:09.789760 01:00 0 [Note] WSREP: declaring 13eae368 at tcp://192.168.1.101:4567 stable
 41 2018-08-09T11:17:09.789795 01:00 0 [Note] WSREP: declaring 23fb8f7a at tcp://192.168.1.102:4567 stable
 42 2018-08-09T11:17:10.791694 01:00 0 [Note] WSREP: Node 13eae368 state primary
 43 2018-08-09T11:17:10.793677 01:00 0 [Note] WSREP: Current view of cluster as seen by this node
 44 view (view_id(PRIM,13eae368,15)
 45 memb {
 46     13eae368,0
 47     23fb8f7a,0
 48     fe2c0efc,0
 49     }
 50 joined {
 51     }
 52 left {
 53     }
 54 partitioned {
 55     }
 56 )
 57 2018-08-09T11:17:10.793720 01:00 0 [Note] WSREP: Save the discovered primary-component to disk
 58 2018-08-09T11:17:11.055114 01:00 0 [Note] WSREP: gcomm: connected
 59 2018-08-09T11:17:11.055201 01:00 0 [Note] WSREP: Shifting CLOSED -> OPEN (TO: 0)
 60 2018-08-09T11:17:11.055278 01:00 0 [Note] WSREP: Waiting for SST/IST to complete.
 61 2018-08-09T11:17:11.055571 01:00 0 [Note] WSREP: New COMPONENT: primary = yes, bootstrap = no, my_idx = 2, memb_num = 3
 62 2018-08-09T11:17:11.055600 01:00 0 [Note] WSREP: STATE EXCHANGE: Waiting for state UUID.
 63 2018-08-09T11:17:11.055637 01:00 0 [Note] WSREP: STATE EXCHANGE: sent state msg: fee39480-9bb4-11e8-a6f3-7b3d75fc5b99
 64 2018-08-09T11:17:11.055645 01:00 0 [Note] WSREP: STATE EXCHANGE: got state msg: fee39480-9bb4-11e8-a6f3-7b3d75fc5b99 from 0 (zlm2)
 65 2018-08-09T11:17:11.055653 01:00 0 [Note] WSREP: STATE EXCHANGE: got state msg: fee39480-9bb4-11e8-a6f3-7b3d75fc5b99 from 1 (zlm3)
 66 2018-08-09T11:17:11.061999 01:00 0 [Note] WSREP: STATE EXCHANGE: got state msg: fee39480-9bb4-11e8-a6f3-7b3d75fc5b99 from 2 (zlm4)
 67 2018-08-09T11:17:11.062036 01:00 0 [Note] WSREP: Quorum results:
 68     version    = 4,
 69     component  = PRIMARY,
 70     conf_id    = 14,
 71     members    = 3/3 (primary/total),
 72     act_id     = 28,
 73     last_appl. = -1,
 74     protocols  = 0/8/3 (gcs/repl/appl),
 75     group UUID = bd5525ab-9a15-11e8-aa0f-4b830c783fc7
 76 2018-08-09T11:17:11.062046 01:00 0 [Note] WSREP: Flow-control interval: [173, 173]
 77 2018-08-09T11:17:11.062050 01:00 0 [Note] WSREP: Trying to continue unpaused monitor
 78 2018-08-09T11:17:11.062055 01:00 0 [Note] WSREP: Restored state OPEN -> JOINED (28)
 79 2018-08-09T11:17:11.062282 01:00 2 [Note] WSREP: REPL Protocols: 8 (3, 2)
 80 2018-08-09T11:17:11.062308 01:00 2 [Note] WSREP: New cluster view: global state: bd5525ab-9a15-11e8-aa0f-4b830c783fc7:28, view# 15: Primary, number of nodes: 3, my index: 2, protocol version 3
 81 2018-08-09T11:17:11.062314 01:00 2 [Note] WSREP: Setting wsrep_ready to true
 82 2018-08-09T11:17:11.062329 01:00 0 [Note] WSREP: SST complete, seqno: 28
 83 2018-08-09T11:17:11.063803 01:00 0 [Note] WSREP: Member 2.0 (zlm4) synced with group.
 84 2018-08-09T11:17:11.063831 01:00 0 [Note] WSREP: Shifting JOINED -> SYNCED (TO: 28)
 85 2018-08-09T11:17:11.066318 01:00 0 [Warning] InnoDB: Using innodb_locks_unsafe_for_binlog is DEPRECATED. This option may be removed in future releases. Please use READ COMMITTED transaction isolation level instead; Please refer to http://dev.mysql.com/doc/refman/5.7/en/set-transaction.html
 86 2018-08-09T11:17:11.066413 01:00 0 [Note] InnoDB: PUNCH HOLE support available
 87 2018-08-09T11:17:11.066426 01:00 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
 88 2018-08-09T11:17:11.066439 01:00 0 [Note] InnoDB: Uses event mutexes
 89 2018-08-09T11:17:11.066444 01:00 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
 90 2018-08-09T11:17:11.066448 01:00 0 [Note] InnoDB: Compressed tables use zlib 1.2.7
 91 2018-08-09T11:17:11.066453 01:00 0 [Note] InnoDB: Using Linux native AIO
 92 2018-08-09T11:17:11.066471 01:00 0 [Note] InnoDB: Adjusting innodb_buffer_pool_instances from 4 to 1 since innodb_buffer_pool_size is less than 1024 MiB
 93 2018-08-09T11:17:11.067081 01:00 0 [Note] InnoDB: Number of pools: 1
 94 2018-08-09T11:17:11.067235 01:00 0 [Note] InnoDB: Using CPU crc32 instructions
 95 2018-08-09T11:17:11.068926 01:00 0 [Note] InnoDB: Initializing buffer pool, total size = 100M, instances = 1, chunk size = 100M
 96 2018-08-09T11:17:11.071673 01:00 0 [Note] InnoDB: Completed initialization of buffer pool
 97 2018-08-09T11:17:11.074414 01:00 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
 98 2018-08-09T11:17:11.093895 01:00 0 [Note] InnoDB: Crash recovery did not find the parallel doublewrite buffer at /data/mysql/mysql3308/data/xb_doublewrite
 99 2018-08-09T11:17:11.095767 01:00 0 [Note] InnoDB: Highest supported file format is Barracuda.
100 2018-08-09T11:17:11.229162 01:00 0 [Note] InnoDB: Created parallel doublewrite buffer at /data/mysql/mysql3308/data/xb_doublewrite, size 3932160 bytes
101 2018-08-09T11:17:11.369285 01:00 0 [Note] InnoDB: Creating shared tablespace for temporary tables
102 2018-08-09T11:17:11.369369 01:00 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
103 2018-08-09T11:17:11.773899 01:00 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
104 2018-08-09T11:17:11.774714 01:00 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active.
105 2018-08-09T11:17:11.774734 01:00 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active.
106 2018-08-09T11:17:11.775107 01:00 0 [Note] InnoDB: Waiting for purge to start
107 2018-08-09T11:17:11.845618 01:00 0 [Note] InnoDB: Percona XtraDB (http://www.percona.com) 5.7.22-rel22 started; log sequence number 2641145
108 2018-08-09T11:17:11.845884 01:00 0 [Note] Plugin 'FEDERATED' is disabled.
109 2018-08-09T11:17:11.848626 01:00 0 [Note] InnoDB: Loading buffer pool(s) from /data/mysql/mysql3308/data/ib_buffer_pool
110 2018-08-09T11:17:11.882535 01:00 0 [Note] InnoDB: Buffer pool(s) load completed at 180809 11:17:11
111 2018-08-09T11:17:11.907836 01:00 0 [Note] Found ca.pem, server-cert.pem and server-key.pem in data directory. Trying to enable SSL support using them.
112 2018-08-09T11:17:11.907856 01:00 0 [Note] Skipping generation of SSL certificates as certificate files are present in data directory.
113 2018-08-09T11:17:11.908353 01:00 0 [Warning] CA certificate ca.pem is self signed.
114 2018-08-09T11:17:11.908405 01:00 0 [Note] Skipping generation of RSA key pair as key files are present in data directory.
115 2018-08-09T11:17:11.908482 01:00 0 [Note] Server hostname (bind-address): '*'; port: 3308
116 2018-08-09T11:17:11.908505 01:00 0 [Note] IPv6 is available.
117 2018-08-09T11:17:11.908513 01:00 0 [Note]   - '::' resolves to '::';
118 2018-08-09T11:17:11.908527 01:00 0 [Note] Server socket created on IP: '::'.
119 2018-08-09T11:17:11.910446 01:00 0 [Warning] 'user' entry 'root@localhost' ignored in --skip-name-resolve mode.
120 2018-08-09T11:17:11.910481 01:00 0 [Warning] 'user' entry 'mysql.session@localhost' ignored in --skip-name-resolve mode.
121 2018-08-09T11:17:11.910489 01:00 0 [Warning] 'user' entry 'mysql.sys@localhost' ignored in --skip-name-resolve mode.
122 2018-08-09T11:17:11.910495 01:00 0 [Warning] 'user' entry 'sst@localhost' ignored in --skip-name-resolve mode.
123 2018-08-09T11:17:11.910512 01:00 0 [Warning] 'db' entry 'performance_schema mysql.session@localhost' ignored in --skip-name-resolve mode.
124 2018-08-09T11:17:11.910516 01:00 0 [Warning] 'db' entry 'sys mysql.sys@localhost' ignored in --skip-name-resolve mode.
125 2018-08-09T11:17:11.910522 01:00 0 [Warning] 'proxies_priv' entry '@ root@localhost' ignored in --skip-name-resolve mode.
126 2018-08-09T11:17:11.911126 01:00 0 [Warning] 'tables_priv' entry 'user mysql.session@localhost' ignored in --skip-name-resolve mode.
127 2018-08-09T11:17:11.911142 01:00 0 [Warning] 'tables_priv' entry 'sys_config mysql.sys@localhost' ignored in --skip-name-resolve mode.
128 2018-08-09T11:17:11.913579 01:00 0 [Warning] Neither --relay-log nor --relay-log-index were used; so replication may break when this MySQL server acts as a slave and has his hostname changed!! Please use '--relay-log=zlm4-relay-bin' to avoid this problem.
129 2018-08-09T11:17:11.925857 01:00 0 [Note] Event Scheduler: Loaded 0 events
130 2018-08-09T11:17:11.926371 01:00 0 [Note] mysqld: ready for connections.
131 Version: '5.7.22-22-29.26-log'  socket: '/tmp/mysql3308.sock'  port: 3308  Percona XtraDB Cluster binary (GPL) 5.7.22-29.26, Revision da86071, wsrep_29.26
132 2018-08-09T11:17:11.930200 01:00 2 [Note] WSREP: Initialized wsrep sidno 2
133 2018-08-09T11:17:11.930223 01:00 2 [Note] WSREP: Auto Increment Offset/Increment re-align with cluster membership change (Offset: 1 -> 3) (Increment: 1 -> 3)
134 2018-08-09T11:17:11.930233 01:00 2 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
135 2018-08-09T11:17:11.930250 01:00 2 [Note] WSREP: Assign initial position for certification: 28, protocol version: 3
136 2018-08-09T11:17:11.930317 01:00 0 [Note] WSREP: Service thread queue flushed.
137 2018-08-09T11:17:11.930499 01:00 2 [Note] WSREP: Synchronized with group, ready for connections
138 2018-08-09T11:17:11.930505 01:00 2 [Note] WSREP: Setting wsrep_ready to true
139 2018-08-09T11:17:11.930507 01:00 2 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
140 2018-08-09T11:17:13.056460 01:00 0 [Note] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') turning message relay requesting off

Summay

**Try to skip the error 1051 on master.**

 

Introduce

 

**Check the status of PXC and the data of table t1.**

 1 //Master
 2 (zlm@192.168.1.101 3306)[(none)]>set rpl_semi_sync_master_enabled=on;
 3 ERROR 1229 (HY000): Variable 'rpl_semi_sync_master_enabled' is a GLOBAL variable and should be set with SET GLOBAL
 4 (zlm@192.168.1.101 3306)[(none)]>set global rpl_semi_sync_master_enabled=on;
 5 Query OK, 0 rows affected (0.00 sec)
 6 
 7 (zlm@192.168.1.101 3306)[(none)]>show variables like 'rpl_semi_sync_master_enabled';
 8  ------------------------------ ------- 
 9 | Variable_name                | Value |
10  ------------------------------ ------- 
11 | rpl_semi_sync_master_enabled | ON    |
12  ------------------------------ ------- 
13 1 row in set (0.01 sec)
14 
15 //Slave1
16 (zlm@192.168.1.102 3306)[(none)]>set @@global.rpl_semi_sync_slave_enabled=on;
17 Query OK, 0 rows affected (0.00 sec)
18 
19 (zlm@192.168.1.102 3306)[(none)]>show variables like 'rpl_semi_sync%';
20  --------------------------------- ------- 
21 | Variable_name                   | Value |
22  --------------------------------- ------- 
23 | rpl_semi_sync_slave_enabled     | ON    |
24 | rpl_semi_sync_slave_trace_level | 32    |
25  --------------------------------- ------- 
26 2 rows in set (0.00 sec)
27 
28 //Slave2
29 (zlm@192.168.1.103 3306)[(none)]>set @@global.rpl_semi_sync_slave_enabled=on;
30 Query OK, 0 rows affected (0.00 sec)
31 
32 (zlm@192.168.1.103 3306)[(none)]>show variables like 'rpl_semi_sync%';
33  --------------------------------- ------- 
34 | Variable_name                   | Value |
35  --------------------------------- ------- 
36 | rpl_semi_sync_slave_enabled     | ON    |
37 | rpl_semi_sync_slave_trace_level | 32    |
38  --------------------------------- ------- 
39 2 rows in set (0.01 sec)
40 
41 //Master
42 (zlm@192.168.1.101 3306)[(none)]>show global status like 'Rpl_semi_sync_master_clients';
43  ------------------------------ ------- 
44 | Variable_name                | Value |
45  ------------------------------ ------- 
46 | Rpl_semi_sync_master_clients | 2     | //It means there're two slaves using semi-sync replicaiton follow master now.
47  ------------------------------ ------- 
48 1 row in set (0.00 sec)

 

 

 

 1 zlm@192.168.56.101:3306 [zlm]>show create table testG
 2 *************************** 1. row ***************************
 3        Table: test
 4 Create Table: CREATE TABLE `test` (
 5   `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
 6   `name` varchar(20) NOT NULL DEFAULT '',
 7   PRIMARY KEY (`id`)
 8 ) ENGINE=InnoDB AUTO_INCREMENT=100001 DEFAULT CHARSET=utf8mb4
 9 1 row in set (0.00 sec)
10 
11 zlm@192.168.56.101:3306 [zlm]>select count(*) from test;
12  ---------- 
13 | count(*) |
14  ---------- 
15 |   100000 |
16  ---------- 
17 1 row in set (0.02 sec)
18 
19 //No change happened.

Procedure

  • The behavior of semi-sync replication depends on the variables that you specified.
  • If the value of "rpl_semi_sync_master_wait_no_slave" is "on",the status of semi-sync won't change until it reaches the value of timeout,even though the amount of slaves are less than it in "rpl_semi_sync_master_slave_count".
  • **If the value of "rpl_semi_sync_master_wait_no_slave" is "off",master won't wait for timeout before it reverts to normal replication when slave decreases to less than the value above.**
  • In order to observe the result conveniently,I increase the value of "rpl_semi_sync_master_timeout" to 60s.
  • In most high consistent scenarios,the value can be tremendous enough to avoid degenerating to asynchronous replication.
  • **If the degeneration is due to network failure such as instant glitch.The semi-sync status will be ok after the network becomes normal.**
  • I'm afraid the best practice is to set "rpl_semi_sync_master_wait_no_slave" to "on" and the "rpl_semi_sync_master_timeout" to a comparative value.**

Introduce

 

 1 (zlm@192.168.1.101 3306)[(none)]>show global status like 'Rpl_semi_sync%';
 2  -------------------------------------------- ------------ 
 3 | Variable_name                              | Value      |
 4  -------------------------------------------- ------------ 
 5 | Rpl_semi_sync_master_clients               | 2          |
 6 | Rpl_semi_sync_master_net_avg_wait_time     | 0          |
 7 | Rpl_semi_sync_master_net_wait_time         | 0          |
 8 | Rpl_semi_sync_master_net_waits             | 3949144    |
 9 | Rpl_semi_sync_master_no_times              | 9          |
10 | Rpl_semi_sync_master_no_tx                 | 1788275    |
11 | Rpl_semi_sync_master_status                | ON         |
12 | Rpl_semi_sync_master_timefunc_failures     | 0          |
13 | Rpl_semi_sync_master_tx_avg_wait_time      | 1859       |
14 | Rpl_semi_sync_master_tx_wait_time          | 1354150254 |
15 | Rpl_semi_sync_master_tx_waits              | 728148     |
16 | Rpl_semi_sync_master_wait_pos_backtraverse | 0          |
17 | Rpl_semi_sync_master_wait_sessions         | 0          |
18 | Rpl_semi_sync_master_yes_tx                | 795124     |
19  -------------------------------------------- ------------ 
20 14 rows in set (0.00 sec)

1.Test of automatically restart slave.

**Do some DML operations on node zlm3.**

 1 //Slave
 2 (zlm@192.168.1.102 3306)[(none)]>start slave;
 3 Query OK, 0 rows affected (0.01 sec)
 4 
 5 //Error log of master
 6 2018-07-16T11:33:22.727473 01:00 60 [Note] Start binlog_dump to master_thread_id(60) slave_server(1023306), pos(, 4)
 7 2018-07-16T11:33:31.005135 01:00 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 8431ms. The settings might not be optimal. (flushed=737 and evicted=0, during the time.)
 8 2018-07-16T11:33:31.838932 01:00 60 [Note] Start semi-sync binlog_dump to slave (server_id: 1023306), pos(, 4)
 9 2018-07-16T11:33:50.117239 01:00 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 6667ms. The settings might not be optimal. (flushed=741 and evicted=0, during the time.)
10 2018-07-16T11:33:59.977585 01:00 0 [Note] Semi-sync replication switched ON at (mysql-bin.000008, 206778238)

 

**Check the table on node zlm2.**

1 (zlm@192.168.1.102 3306)[(none)]>system date
2 Mon Jul 16 11:35:55 CEST 2018
3 (zlm@192.168.1.102 3306)[(none)]>stop slave; //The stopping time was 11:35:58 around.
4 Query OK, 0 rows affected (1.60 sec)

 

 

**Check the global status of semi-sync and error log on master.**

*    pt-slave-restart is the one who can skip specific errors and restart the slave automatically.But considering of the consistency of data,we'd better do think twice when skipping errors by it.There're two test below.Let's see how the pt-slave-restart works.
*

**Check the PXC status at first.**

 1 (zlm@192.168.1.101 3306)[(none)]>set @@global.rpl_semi_sync_master_wait_no_slave=off;
 2 Query OK, 0 rows affected (0.00 sec)
 3 
 4 (zlm@192.168.1.101 3306)[(none)]>show global variables like 'rpl_semi%';
 5  ------------------------------------------- ------------ 
 6 | Variable_name                             | Value      |
 7  ------------------------------------------- ------------ 
 8 | rpl_semi_sync_master_enabled              | ON         |
 9 | rpl_semi_sync_master_timeout              | 60000      |
10 | rpl_semi_sync_master_trace_level          | 32         |
11 | rpl_semi_sync_master_wait_for_slave_count | 2          |
12 | rpl_semi_sync_master_wait_no_slave        | OFF        |
13 | rpl_semi_sync_master_wait_point           | AFTER_SYNC |
14  ------------------------------------------- ------------ 
15 6 rows in set (0.00 sec)
 1 zlm@192.168.56.101:3306 [zlm]>show slave statusG
 2 *************************** 1. row ***************************
 3                Slave_IO_State: Waiting for master to send event
 4                   Master_Host: 192.168.56.100
 5                   Master_User: repl
 6                   Master_Port: 3306
 7                 Connect_Retry: 60
 8               Master_Log_File: mysql-bin.000091
 9           Read_Master_Log_Pos: 1241
10                Relay_Log_File: relay-bin.000032
11                 Relay_Log_Pos: 407
12         Relay_Master_Log_File: mysql-bin.000091
13              Slave_IO_Running: Yes
14             Slave_SQL_Running: No
15               Replicate_Do_DB: 
16           Replicate_Ignore_DB: 
17            Replicate_Do_Table: 
18        Replicate_Ignore_Table: 
19       Replicate_Wild_Do_Table: 
20   Replicate_Wild_Ignore_Table: 
21                    Last_Errno: 1051
22                    Last_Error: Error 'Unknown table 'zlm.test_gbk,zlm.test_utf8,zlm.test_utf8mb4'' on query. Default database: 'zlm'. Query: 'DROP TABLE `test_gbk`,`test_utf8`,`test_utf8mb4` /* generated by server */'
23                  Skip_Counter: 0
24           Exec_Master_Log_Pos: 194
25               Relay_Log_Space: 1908
26               Until_Condition: None
27                Until_Log_File: 
28                 Until_Log_Pos: 0
29            Master_SSL_Allowed: No
30            Master_SSL_CA_File: 
31            Master_SSL_CA_Path: 
32               Master_SSL_Cert: 
33             Master_SSL_Cipher: 
34                Master_SSL_Key: 
35         Seconds_Behind_Master: NULL
36 Master_SSL_Verify_Server_Cert: No
37                 Last_IO_Errno: 0
38                 Last_IO_Error: 
39                Last_SQL_Errno: 1051
40                Last_SQL_Error: Error 'Unknown table 'zlm.test_gbk,zlm.test_utf8,zlm.test_utf8mb4'' on query. Default database: 'zlm'. Query: 'DROP TABLE `test_gbk`,`test_utf8`,`test_utf8mb4` /* generated by server */'
41   Replicate_Ignore_Server_Ids: 
42              Master_Server_Id: 1003306
43                   Master_UUID: 2a4b3562-2ab6-11e8-be7a-080027de0e0e
44              Master_Info_File: /data/mysql/mysql3306/data/master.info
45                     SQL_Delay: 0
46           SQL_Remaining_Delay: NULL
47       Slave_SQL_Running_State: 
48            Master_Retry_Count: 86400
49                   Master_Bind: 
50       Last_IO_Error_Timestamp: 
51      Last_SQL_Error_Timestamp: 180721 13:19:25
52                Master_SSL_Crl: 
53            Master_SSL_Crlpath: 
54            Retrieved_Gtid_Set: 2a4b3562-2ab6-11e8-be7a-080027de0e0e:12715627-12715632
55             Executed_Gtid_Set: 27af30ca-6800-11e8-ad7e-080027de0e0e:1,
56 2a4b3562-2ab6-11e8-be7a-080027de0e0e:1-12715627
57                 Auto_Position: 1
58          Replicate_Rewrite_DB: 
59                  Channel_Name: 
60            Master_TLS_Version: 
61 1 row in set (0.00 sec)
62 
63 zlm@192.168.56.101:3306 [zlm]>show tables;
64  ---------------- 
65 | Tables_in_zlm  |
66  ---------------- 
67 | semi_sync_test |
68 | t1             |
69 | t2             |
70 | t3             |
71 | test           |
72 | test_flashbk   |
73  ---------------- 
74 6 rows in set (0.00 sec)
75 
76 //There're no target tables at all.So error 1051 occurs.

Modify the my3308.cnf to omit the PXC relevant parameter and startup mysqld.

 1 (zlm@192.168.1.101 3306)[(none)]>show global status like 'Rpl_semi_sync%';
 2  -------------------------------------------- ------------ 
 3 | Variable_name                              | Value      |
 4  -------------------------------------------- ------------ 
 5 | Rpl_semi_sync_master_clients               | 2          |
 6 | Rpl_semi_sync_master_net_avg_wait_time     | 0          |
 7 | Rpl_semi_sync_master_net_wait_time         | 0          |
 8 | Rpl_semi_sync_master_net_waits             | 4313674    |
 9 | Rpl_semi_sync_master_no_times              | 11         |
10 | Rpl_semi_sync_master_no_tx                 | 2088478    |
11 | Rpl_semi_sync_master_status                | ON         |
12 | Rpl_semi_sync_master_timefunc_failures     | 0          |
13 | Rpl_semi_sync_master_tx_avg_wait_time      | 1874       |
14 | Rpl_semi_sync_master_tx_wait_time          | 1444213447 |
15 | Rpl_semi_sync_master_tx_waits              | 770393     |
16 | Rpl_semi_sync_master_wait_pos_backtraverse | 0          |
17 | Rpl_semi_sync_master_wait_sessions         | 1          |
18 | Rpl_semi_sync_master_yes_tx                | 840887     |
19  -------------------------------------------- ------------ 
20 14 rows in set (0.00 sec)
21 
22 2018-07-16T11:35:58.920988 01:00 0 [ERROR] mysqld: Got an error reading communication packets
23 2018-07-16T11:36:00.321218 01:00 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 14988ms. The settings might not be optimal. (flushed=2000 and evicted=0, during the time.)
24 2018-07-16T11:36:11.150976 01:00 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 8718ms. The settings might not be optimal. (flushed=1124 and evicted=0, during the time.)
25 2018-07-16T11:36:28.973672 01:00 60 [Note] Stop semi-sync binlog_dump to slave (server_id: 1023306)
26 2018-07-16T11:36:29.012288 01:00 60 [Note] Semi-sync replication switched OFF. //The master didn't wait the timeout occur and revert to aynchronous replication directly within about merely 30s.
27 
28 (zlm@192.168.1.101 3306)[(none)]>show global status like 'Rpl_semi_sync%';
29  -------------------------------------------- ------------ 
30 | Variable_name                              | Value      |
31  -------------------------------------------- ------------ 
32 | Rpl_semi_sync_master_clients               | 1          |
33 | Rpl_semi_sync_master_net_avg_wait_time     | 0          |
34 | Rpl_semi_sync_master_net_wait_time         | 0          |
35 | Rpl_semi_sync_master_net_waits             | 4336577    |
36 | Rpl_semi_sync_master_no_times              | 12         |
37 | Rpl_semi_sync_master_no_tx                 | 2121402    |
38 | Rpl_semi_sync_master_status                | OFF        |
39 | Rpl_semi_sync_master_timefunc_failures     | 0          |
40 | Rpl_semi_sync_master_tx_avg_wait_time      | 1913       |
41 | Rpl_semi_sync_master_tx_wait_time          | 1474253267 |
42 | Rpl_semi_sync_master_tx_waits              | 770394     |
43 | Rpl_semi_sync_master_wait_pos_backtraverse | 0          |
44 | Rpl_semi_sync_master_wait_sessions         | 0          |
45 | Rpl_semi_sync_master_yes_tx                | 840887     |
46  -------------------------------------------- ------------ 
47 14 rows in set (0.00 sec)
 1 zlm@192.168.56.101:3306 [(none)]>show slave statusG
 2 *************************** 1. row ***************************
 3                Slave_IO_State: Waiting for master to send event
 4                   Master_Host: 192.168.56.100
 5                   Master_User: repl
 6                   Master_Port: 3306
 7                 Connect_Retry: 60
 8               Master_Log_File: mysql-bin.000091
 9           Read_Master_Log_Pos: 194
10                Relay_Log_File: relay-bin.000031
11                 Relay_Log_Pos: 407
12         Relay_Master_Log_File: mysql-bin.000091
13              Slave_IO_Running: Yes
14             Slave_SQL_Running: Yes
15               Replicate_Do_DB: 
16           Replicate_Ignore_DB: 
17            Replicate_Do_Table: 
18        Replicate_Ignore_Table: 
19       Replicate_Wild_Do_Table: 
20   Replicate_Wild_Ignore_Table: 
21                    Last_Errno: 0
22                    Last_Error: 
23                  Skip_Counter: 0
24           Exec_Master_Log_Pos: 194
25               Relay_Log_Space: 861
26               Until_Condition: None
27                Until_Log_File: 
28                 Until_Log_Pos: 0
29            Master_SSL_Allowed: No
30            Master_SSL_CA_File: 
31            Master_SSL_CA_Path: 
32               Master_SSL_Cert: 
33             Master_SSL_Cipher: 
34                Master_SSL_Key: 
35         Seconds_Behind_Master: 0
36 Master_SSL_Verify_Server_Cert: No
37                 Last_IO_Errno: 0
38                 Last_IO_Error: 
39                Last_SQL_Errno: 0
40                Last_SQL_Error: 
41   Replicate_Ignore_Server_Ids: 
42              Master_Server_Id: 1003306
43                   Master_UUID: 2a4b3562-2ab6-11e8-be7a-080027de0e0e
44              Master_Info_File: /data/mysql/mysql3306/data/master.info
45                     SQL_Delay: 0
46           SQL_Remaining_Delay: NULL
47       Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
48            Master_Retry_Count: 86400
49                   Master_Bind: 
50       Last_IO_Error_Timestamp: 
51      Last_SQL_Error_Timestamp: 
52                Master_SSL_Crl: 
53            Master_SSL_Crlpath: 
54            Retrieved_Gtid_Set: 2a4b3562-2ab6-11e8-be7a-080027de0e0e:12715627
55             Executed_Gtid_Set: 27af30ca-6800-11e8-ad7e-080027de0e0e:1,
56 2a4b3562-2ab6-11e8-be7a-080027de0e0e:1-12715627
57                 Auto_Position: 1
58          Replicate_Rewrite_DB: 
59                  Channel_Name: 
60            Master_TLS_Version: 
61 1 row in set (0.00 sec)
 1 (root@localhost mysql3308.sock)[(none)]>use zlm
 2 Reading table information for completion of table and column names
 3 You can turn off this feature to get a quicker startup with -A
 4 
 5 Database changed
 6 (root@localhost mysql3308.sock)[zlm]>insert into t1 values(4,'Redis');
 7 Query OK, 1 row affected (0.01 sec)
 8 
 9 (root@localhost mysql3308.sock)[zlm]>select * from t1;
10  ---- ------------ 
11 | id | name       |
12  ---- ------------ 
13 |  1 | MySQL      |
14 |  2 | Oracle     |
15 |  3 | PostgreSQL |
16 |  4 | Redis      |
17  ---- ------------ 
18 4 rows in set (0.00 sec)

 

 1 [root@zlm1 12:15:35 ~]
 2 #pt-slave-restart --recurse=1 --always -h192.168.56.101 -P3306 -urepl -prepl4slave
 3 *******************************************************************
 4  Using the default of SSL_verify_mode of SSL_VERIFY_NONE for client
 5  is deprecated! Please set SSL_verify_mode to SSL_VERIFY_PEER
 6  together with SSL_ca_file|SSL_ca_path for verification.
 7  If you really don't want to verify the certificate and keep the
 8  connection open to Man-In-The-Middle attacks please set
 9  SSL_verify_mode explicitly to SSL_VERIFY_NONE in your application.
10 *******************************************************************
11   at /usr/bin/pt-slave-restart line 3841.
12 *******************************************************************
13  Using the default of SSL_verify_mode of SSL_VERIFY_NONE for client
14  is deprecated! Please set SSL_verify_mode to SSL_VERIFY_PEER
15  together with SSL_ca_file|SSL_ca_path for verification.
16  If you really don't want to verify the certificate and keep the
17  connection open to Man-In-The-Middle attacks please set
18  SSL_verify_mode explicitly to SSL_VERIFY_NONE in your application.
19 *******************************************************************
20   at /usr/bin/pt-slave-restart line 3841.
21 
22 # A software update is available:
23 2018-07-21T12:18:15 P=3306,h=192.168.56.101,p=...,u=repl relay-bin.000030         407 0
24 
25 //It has begun to monitor the slave to automatically startup.
  1 [root@zlm3 10:54:51 /data/mysql/mysql3308/logs]
  2 #mysqlbinlog -v --base64-output=decode-rows mysql-bin.000023 > ~/23.log
  3 
  4 [root@zlm3 10:55:27 /data/mysql/mysql3308/logs]
  5 #cat ~/23.log
  6 /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/;
  7 /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
  8 DELIMITER /*!*/;
  9 # at 4
 10 #180809  4:09:22 server id 1023308  end_log_pos 123 CRC32 0x6f7e8565     Start: binlog v 4, server v 5.7.22-22-29.26-log created 180809  4:09:22 at startup
 11 # Warning: this binlog is either in use or was not closed properly.
 12 ROLLBACK/*!*/;
 13 # at 123
 14 #180809  4:09:22 server id 1023308  end_log_pos 194 CRC32 0x43a7c3b7     Previous-GTIDs
 15 # 42aada54-65ea-ee17-55f0-b47cf387c038:1-19
 16 # at 194
 17 #180809  9:07:52 server id 1023308  end_log_pos 259 CRC32 0x531076d3     GTID    last_committed=0    sequence_number=1    rbr_only=no
 18 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:20'/*!*/;
 19 # at 259
 20 #180809  9:07:52 server id 1023308  end_log_pos 350 CRC32 0x9acb4e3f     Query    thread_id=5    exec_time=0    error_code=0
 21 SET TIMESTAMP=1533798472/*!*/;
 22 SET @@session.pseudo_thread_id=5/*!*/;
 23 SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 24 SET @@session.sql_mode=1436549152/*!*/;
 25 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 26 /*!C utf8 *//*!*/;
 27 SET @@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=33/*!*/;
 28 SET @@session.lc_time_names=0/*!*/;
 29 SET @@session.collation_database=DEFAULT/*!*/;
 30 create database zlm
 31 /*!*/;
 32 # at 350
 33 #180809  9:08:36 server id 1023308  end_log_pos 415 CRC32 0xde316a34     GTID    last_committed=1    sequence_number=2    rbr_only=no
 34 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:21'/*!*/;
 35 # at 415
 36 #180809  9:08:36 server id 1023308  end_log_pos 557 CRC32 0xb29bd4ab     Query    thread_id=5    exec_time=0    error_code=0
 37 use `zlm`/*!*/;
 38 SET TIMESTAMP=1533798516/*!*/;
 39 create table t1(
 40 id int,
 41 name char(10)
 42 ) engine=innodb charset=utf8mb4
 43 /*!*/;
 44 # at 557
 45 #180809  9:13:42 server id 1023308  end_log_pos 622 CRC32 0x2a5f6414     GTID    last_committed=2    sequence_number=3    rbr_only=no
 46 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:22'/*!*/;
 47 # at 622
 48 #180809  9:13:42 server id 1023308  end_log_pos 728 CRC32 0xa803e3aa     Query    thread_id=5    exec_time=0    error_code=0
 49 SET TIMESTAMP=1533798822/*!*/;
 50 alter table t1 add primary key(id)
 51 /*!*/;
 52 # at 728
 53 #180809  9:13:46 server id 1023308  end_log_pos 793 CRC32 0xfd677245     GTID    last_committed=3    sequence_number=4    rbr_only=yes
 54 /*!50718 SET TRANSACTION ISOLATION LEVEL READ COMMITTED*//*!*/;
 55 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:23'/*!*/;
 56 # at 793
 57 #180809  9:13:46 server id 1023308  end_log_pos 869 CRC32 0x7b568d5a     Query    thread_id=5    exec_time=0    error_code=0
 58 SET TIMESTAMP=1533798826/*!*/;
 59 SET @@session.auto_increment_increment=2, @@session.auto_increment_offset=2/*!*/;
 60 BEGIN
 61 /*!*/;
 62 # at 869
 63 # at 955
 64 #180809  9:13:46 server id 1023308  end_log_pos 1002 CRC32 0x8b4e5e6b     Table_map: `zlm`.`t1` mapped to number 110
 65 # at 1002
 66 #180809  9:13:46 server id 1023308  end_log_pos 1076 CRC32 0x51750bc0     Write_rows: table id 110 flags: STMT_END_F
 67 ### INSERT INTO `zlm`.`t1`
 68 ### SET
 69 ###   @1=1
 70 ###   @2='MySQL'
 71 ### INSERT INTO `zlm`.`t1`
 72 ### SET
 73 ###   @1=2
 74 ###   @2='Oracle'
 75 ### INSERT INTO `zlm`.`t1`
 76 ### SET
 77 ###   @1=3
 78 ###   @2='PostgreSQL'
 79 # at 1076
 80 #180809  9:13:46 server id 1023308  end_log_pos 1107 CRC32 0x6033f0ee     Xid = 26
 81 COMMIT/*!*/;
 82 # at 1107
 83 #180809 10:12:07 server id 1023308  end_log_pos 1172 CRC32 0x66f4de8c     GTID    last_committed=4    sequence_number=5    rbr_only=no
 84 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:24'/*!*/;
 85 # at 1172
 86 #180809 10:12:07 server id 1023308  end_log_pos 1397 CRC32 0x86665c03     Query    thread_id=8    exec_time=0    error_code=0
 87 SET TIMESTAMP=1533802327/*!*/;
 88 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 89 GRANT ALL PRIVILEGES ON *.* TO 'repl'@'192.168.1.%' IDENTIFIED WITH 'mysql_native_password' AS '*872ECE72A7EBAC6A183C90D7043D5F359BD85A9E'
 90 /*!*/;
 91 # at 1397
 92 #180809 10:50:26 server id 1023308  end_log_pos 1462 CRC32 0x9e027e44     GTID    last_committed=5    sequence_number=6    rbr_only=yes
 93 /*!50718 SET TRANSACTION ISOLATION LEVEL READ COMMITTED*//*!*/;
 94 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:25'/*!*/;
 95 # at 1462
 96 #180809 10:50:26 server id 1023308  end_log_pos 1538 CRC32 0xe5d003cf     Query    thread_id=8    exec_time=0    error_code=0
 97 SET TIMESTAMP=1533804626/*!*/;
 98 SET @@session.auto_increment_increment=2, @@session.auto_increment_offset=2/*!*/;
 99 BEGIN
100 /*!*/;
101 # at 1538
102 # at 1594
103 #180809 10:50:26 server id 1023308  end_log_pos 1641 CRC32 0x81684c91     Table_map: `zlm`.`t1` mapped to number 110
104 # at 1641
105 #180809 10:50:26 server id 1023308  end_log_pos 1687 CRC32 0x19b42ee8     Write_rows: table id 110 flags: STMT_END_F
106 ### INSERT INTO `zlm`.`t1`
107 ### SET
108 ###   @1=4
109 ###   @2='Redis'
110 # at 1687
111 #180809 10:50:26 server id 1023308  end_log_pos 1718 CRC32 0x3429fa99     Xid = 28
112 COMMIT/*!*/;
113 SET @@SESSION.GTID_NEXT= 'AUTOMATIC' /* added by mysqlbinlog */ /*!*/;
114 DELIMITER ;
115 # End of log file
116 /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
117 /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
118 
119 [root@zlm3 11:00:48 /data/mysql/mysql3308/logs]
120 #ls -l
121 total 12
122 -rw-r----- 1 mysql mysql  194 Aug  9 04:09 mysql-bin.000022
123 -rw-r----- 1 mysql mysql 1718 Aug  9 10:50 mysql-bin.000023 //The 1718 bytes is right the position we need to decide which Xid we should set.
124 -rw-r----- 1 mysql mysql   88 Aug  9 04:09 mysql-bin.index
125 
126 //As there're no other transactions found in mysql-bin.000023.The last "Xid = 28" is what we need to set on node zlm4.

**Check the global status of semi-sync and error log on master one more time.** 

 

 

Framework

**Check whether the slave replication is normal.**

 1 (zlm@192.168.1.103 3308)[(none)]>stop slave;
 2 Query OK, 0 rows affected (0.01 sec)
 3 
 4 (zlm@192.168.1.103 3308)[(none)]>show slave statusG
 5 *************************** 1. row ***************************
 6                Slave_IO_State: 
 7                   Master_Host: 192.168.1.102
 8                   Master_User: repl
 9                   Master_Port: 3308
10                 Connect_Retry: 60
11               Master_Log_File: mysql-bin.000023
12           Read_Master_Log_Pos: 1718
13                Relay_Log_File: zlm4-relay-bin.000003
14                 Relay_Log_Pos: 775
15         Relay_Master_Log_File: mysql-bin.000023 //This binlog file is which one we need to analyze later on master node zlm3.
16              Slave_IO_Running: No
17             Slave_SQL_Running: No
18               Replicate_Do_DB: 
19           Replicate_Ignore_DB: 
20            Replicate_Do_Table: 
21        Replicate_Ignore_Table: 
22       Replicate_Wild_Do_Table: 
23   Replicate_Wild_Ignore_Table: 
24                    Last_Errno: 0
25                    Last_Error: 
26                  Skip_Counter: 0
27           Exec_Master_Log_Pos: 1718 //This position is where we need to set the Xid.
28               Relay_Log_Space: 2397
29               Until_Condition: None
30                Until_Log_File: 
31                 Until_Log_Pos: 0
32            Master_SSL_Allowed: No
33            Master_SSL_CA_File: 
34            Master_SSL_CA_Path: 
35               Master_SSL_Cert: 
36             Master_SSL_Cipher: 
37                Master_SSL_Key: 
38         Seconds_Behind_Master: NULL
39 Master_SSL_Verify_Server_Cert: No
40                 Last_IO_Errno: 0
41                 Last_IO_Error: 
42                Last_SQL_Errno: 0
43                Last_SQL_Error: 
44   Replicate_Ignore_Server_Ids: 
45              Master_Server_Id: 1023308
46                   Master_UUID: 3ba41aa7-9b79-11e8-ad75-080027de0e0e
47              Master_Info_File: /data/mysql/mysql3308/data/master.info
48                     SQL_Delay: 0
49           SQL_Remaining_Delay: NULL
50       Slave_SQL_Running_State: 
51            Master_Retry_Count: 86400
52                   Master_Bind: 
53       Last_IO_Error_Timestamp: 
54      Last_SQL_Error_Timestamp: 
55                Master_SSL_Crl: 
56            Master_SSL_Crlpath: 
57            Retrieved_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:20-25
58             Executed_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:1-25
59                 Auto_Position: 1
60          Replicate_Rewrite_DB: 
61                  Channel_Name: 
62            Master_TLS_Version: 
63 1 row in set (0.00 sec)

 

 

Framework

**Execute sysbench to generate some trasactions.**

**Check the slave status the fifth times.**

 

 1 (zlm@192.168.1.101 3306)[(none)]>set @@global.rpl_semi_sync_master_timeout=60000;
 2 Query OK, 0 rows affected (0.00 sec)
 3 
 4 (zlm@192.168.1.101 3306)[(none)]>show global variables like 'rpl_semi_sync_master_timeout';
 5  ------------------------------ ------- 
 6 | Variable_name                | Value |
 7  ------------------------------ ------- 
 8 | rpl_semi_sync_master_timeout | 60000 |
 9  ------------------------------ ------- 
10 1 row in set (0.00 sec)
1 [root@zlm1 13:39:44 ~]
2 #pt-slave-restart --recurse=0 --error-number=1068 -h192.168.56.101 -P3306 -urepl -prepl4slave
3 2018-07-21T13:50:39 P=3306,h=192.168.56.101,p=...,u=repl relay-bin.000032         814 1068 
4 2018-07-21T13:50:42 P=3306,h=192.168.56.101,p=...,u=repl relay-bin.000032        1194 1677 
5 Error 1677 is not in --error-numbers.

Modify the grastate.dat file on node zlm4(if not exist,touch a new file of it).

 

 

**Generate a backup set by Xtrabackup on node zlm3.**

Preface

 

 

**Change the variable "rpl_semi_sync_master_wait_no_slave**" ot off.**

 

 

**Enable semi-sync replication on both master and slaves.**

Usage

 

    Semi-synchronous replication is supported since MySQL 5.5 and then enhanced gradually in 5.6 & 5.7.It's also called enhanced semi-synchronous replicaiton in MySQL 5.7.**The new method of ACK rule in 5.7(after_sync) make the consistency be strongly guaranteed.Maybe that is the reason why it gets the name.Today I'm gonna demonstrate the effect of sevaral variables of semi-sync.

 

 

 

See what will happen on test of slave.

 1 [root@zlm3 09:01:42 /data/mysql/mysql3308/data]
 2 #tail -f error.log 
 3 2018-08-09T09:02:44.880772 01:00 0 [Note] WSREP: (23fb8f7a, 'tcp://0.0.0.0:4567') turning message relay requesting on, nonlive peers: tcp://192.168.1.103:4567 
 4 2018-08-09T09:02:44.880866 01:00 0 [Note] WSREP: declaring 13eae368 at tcp://192.168.1.101:4567 stable
 5 2018-08-09T09:02:44.880877 01:00 0 [Note] WSREP: forgetting 74f3db69 (tcp://192.168.1.103:4567)
 6 2018-08-09T09:02:44.880899 01:00 0 [Note] WSREP: (23fb8f7a, 'tcp://0.0.0.0:4567') turning message relay requesting off
 7 2018-08-09T09:02:44.884451 01:00 0 [Note] WSREP: Node 13eae368 state primary
 8 2018-08-09T09:02:44.887086 01:00 0 [Note] WSREP: Current view of cluster as seen by this node
 9 view (view_id(PRIM,13eae368,12)
10 memb {
11     13eae368,0
12     23fb8f7a,0
13     }
14 joined {
15     }
16 left {
17     }
18 partitioned {
19     74f3db69,0
20     }
21 )
22 2018-08-09T09:02:44.887205 01:00 0 [Note] WSREP: Save the discovered primary-component to disk
23 2018-08-09T09:02:44.887402 01:00 0 [Note] WSREP: forgetting 74f3db69 (tcp://192.168.1.103:4567)
24 2018-08-09T09:02:44.887688 01:00 0 [Note] WSREP: New COMPONENT: primary = yes, bootstrap = no, my_idx = 1, memb_num = 2
25 2018-08-09T09:02:44.887705 01:00 0 [Note] WSREP: STATE EXCHANGE: Waiting for state UUID.
26 2018-08-09T09:02:44.888444 01:00 0 [Note] WSREP: STATE EXCHANGE: sent state msg: 37401cc1-9ba2-11e8-87aa-2f9e83444bbe
27 2018-08-09T09:02:44.889150 01:00 0 [Note] WSREP: STATE EXCHANGE: got state msg: 37401cc1-9ba2-11e8-87aa-2f9e83444bbe from 0 (zlm2)
28 2018-08-09T09:02:44.889187 01:00 0 [Note] WSREP: STATE EXCHANGE: got state msg: 37401cc1-9ba2-11e8-87aa-2f9e83444bbe from 1 (zlm3)
29 2018-08-09T09:02:44.889198 01:00 0 [Note] WSREP: Quorum results:
30     version    = 4,
31     component  = PRIMARY,
32     conf_id    = 11,
33     members    = 2/2 (primary/total),
34     act_id     = 22,
35     last_appl. = 0,
36     protocols  = 0/8/3 (gcs/repl/appl),
37     group UUID = bd5525ab-9a15-11e8-aa0f-4b830c783fc7
38 2018-08-09T09:02:44.889206 01:00 0 [Note] WSREP: Flow-control interval: [141, 141]
39 2018-08-09T09:02:44.889210 01:00 0 [Note] WSREP: Trying to continue unpaused monitor
40 2018-08-09T09:02:44.889304 01:00 2 [Note] WSREP: REPL Protocols: 8 (3, 2)
41 2018-08-09T09:02:44.889315 01:00 2 [Note] WSREP: New cluster view: global state: bd5525ab-9a15-11e8-aa0f-4b830c783fc7:22, view# 12: Primary, number of nodes: 2, my index: 1, protocol version 3
42 2018-08-09T09:02:44.889319 01:00 2 [Note] WSREP: Setting wsrep_ready to true
43 2018-08-09T09:02:44.889324 01:00 2 [Note] WSREP: Auto Increment Offset/Increment re-align with cluster membership change (Offset: 2 -> 2) (Increment: 3 -> 2)
44 2018-08-09T09:02:44.889328 01:00 2 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
45 2018-08-09T09:02:44.889336 01:00 2 [Note] WSREP: Assign initial position for certification: 22, protocol version: 3
46 2018-08-09T09:02:44.889355 01:00 0 [Note] WSREP: Service thread queue flushed.
47 2018-08-09T09:02:50.000210 01:00 0 [Note] WSREP:  cleaning up 74f3db69 (tcp://192.168.1.103:4567)

 


 1 (zlm@192.168.1.103 3308)[(none)]>show global status like '%wsrep%';
 2  ---------------------------------- ---------------------------------------------------------- 
 3 | Variable_name                    | Value                                                    |
 4  ---------------------------------- ---------------------------------------------------------- 
 5 | wsrep_local_state_uuid           | bd5525ab-9a15-11e8-aa0f-4b830c783fc7                     |
 6 | wsrep_protocol_version           | 8                                                        |
 7 | wsrep_last_applied               | 28                                                       |
 8 | wsrep_last_committed             | 28                                                       |
 9 | wsrep_replicated                 | 0                                                        |
10 | wsrep_replicated_bytes           | 0                                                        |
11 | wsrep_repl_keys                  | 0                                                        |
12 | wsrep_repl_keys_bytes            | 0                                                        |
13 | wsrep_repl_data_bytes            | 0                                                        |
14 | wsrep_repl_other_bytes           | 0                                                        |
15 | wsrep_received                   | 2                                                        |
16 | wsrep_received_bytes             | 279                                                      |
17 | wsrep_local_commits              | 0                                                        |
18 | wsrep_local_cert_failures        | 0                                                        |
19 | wsrep_local_replays              | 0                                                        |
20 | wsrep_local_send_queue           | 0                                                        |
21 | wsrep_local_send_queue_max       | 1                                                        |
22 | wsrep_local_send_queue_min       | 0                                                        |
23 | wsrep_local_send_queue_avg       | 0.000000                                                 |
24 | wsrep_local_recv_queue           | 0                                                        |
25 | wsrep_local_recv_queue_max       | 1                                                        |
26 | wsrep_local_recv_queue_min       | 0                                                        |
27 | wsrep_local_recv_queue_avg       | 0.000000                                                 |
28 | wsrep_local_cached_downto        | 0                                                        |
29 | wsrep_flow_control_paused_ns     | 0                                                        |
30 | wsrep_flow_control_paused        | 0.000000                                                 |
31 | wsrep_flow_control_sent          | 0                                                        |
32 | wsrep_flow_control_recv          | 0                                                        |
33 | wsrep_flow_control_interval      | [ 173, 173 ]                                             |
34 | wsrep_flow_control_interval_low  | 173                                                      |
35 | wsrep_flow_control_interval_high | 173                                                      |
36 | wsrep_flow_control_status        | OFF                                                      |
37 | wsrep_cert_deps_distance         | 0.000000                                                 |
38 | wsrep_apply_oooe                 | 0.000000                                                 |
39 | wsrep_apply_oool                 | 0.000000                                                 |
40 | wsrep_apply_window               | 0.000000                                                 |
41 | wsrep_commit_oooe                | 0.000000                                                 |
42 | wsrep_commit_oool                | 0.000000                                                 |
43 | wsrep_commit_window              | 0.000000                                                 |
44 | wsrep_local_state                | 4                                                        |
45 | wsrep_local_state_comment        | Synced                                                   |
46 | wsrep_cert_index_size            | 0                                                        |
47 | wsrep_cert_bucket_count          | 22                                                       |
48 | wsrep_gcache_pool_size           | 1320                                                     |
49 | wsrep_causal_reads               | 0                                                        |
50 | wsrep_cert_interval              | 0.000000                                                 |
51 | wsrep_ist_receive_status         |                                                          |
52 | wsrep_ist_receive_seqno_start    | 0                                                        |
53 | wsrep_ist_receive_seqno_current  | 0                                                        |
54 | wsrep_ist_receive_seqno_end      | 0                                                        |
55 | wsrep_incoming_addresses         | 192.168.1.101:3308,192.168.1.102:3308,192.168.1.103:3308 |
56 | wsrep_desync_count               | 0                                                        |
57 | wsrep_evs_delayed                |                                                          |
58 | wsrep_evs_evict_list             |                                                          |
59 | wsrep_evs_repl_latency           | 0/0/0/0/0                                                |
60 | wsrep_evs_state                  | OPERATIONAL                                              |
61 | wsrep_gcomm_uuid                 | fe2c0efc-9bb4-11e8-82b0-6b01a1a0030d                     |
62 | wsrep_cluster_conf_id            | 15                                                       |
63 | wsrep_cluster_size               | 3                                                        | //The size of PXC turned out to be three again.
64 | wsrep_cluster_state_uuid         | bd5525ab-9a15-11e8-aa0f-4b830c783fc7                     |
65 | wsrep_cluster_status             | Primary                                                  |
66 | wsrep_connected                  | ON                                                       |
67 | wsrep_local_bf_aborts            | 0                                                        |
68 | wsrep_local_index                | 2                                                        |
69 | wsrep_provider_name              | Galera                                                   |
70 | wsrep_provider_vendor            | Codership Oy <info@codership.com>                        |
71 | wsrep_provider_version           | 3.26(r)                                                  |
72 | wsrep_ready                      | ON                                                       |
73  ---------------------------------- ---------------------------------------------------------- 
74 68 rows in set (0.00 sec)
75 
76 (zlm@192.168.1.103 3308)[(none)]>select * from zlm.t1;
77  ---- ------------ 
78 | id | name       |
79  ---- ------------ 
80 |  1 | MySQL      |
81 |  2 | Oracle     |
82 |  3 | PostgreSQL |
83 |  4 | Redis      |
84  ---- ------------ 
85 4 rows in set (0.01 sec)
86 
87 //The fourth record of "Redis" has been shown correctly on node zlm4.

 

 

 

**Check the global status of semi-sync on master.**

 

 

Example

 1 --always //Start slaves if there's no error,it will prevent to you stop slave manully.
 2 --check-relay-log //Check the relay log file before checking errors on slave.
 3 --error-length //Specify the max length to print.
 4 --error-number //Specify the number of errors you want to make the slave try to restart.
 5 --error-text //Specify the text of errors you want to make the slave try to restart.
 6 --max-sleep //Specify the maximum sleep time after it polling the slave.
 7 --min-sleep //Specify the minimum sleep time after it polling the slave.
 8 --monitor //whether to monitor the slave(default)
 9 --master-uuid //Specify the master-uuid you want to skip,if you have multiple writing node.
10 --recurse //If you want to execute pt-slave-restart on master.It's dispensable option.
11 --recurse-method //This option is used together with "--recurse".It specify the method to find slaves.
12 --sleep //Specify the interval of sleep time in checking the slave.
13 --until-master //run until this master logfile,position then exit.
14 --until-relay //run until this relay logfile,position then exit.

Check the error log on node zlm3.

 

Example

 

 1 //Master
 2 (zlm@192.168.1.101 3306)[(none)]>show variables like 'rpl_semi%';
 3  ------------------------------------------- ------------ 
 4 | Variable_name                             | Value      |
 5  ------------------------------------------- ------------ 
 6 | rpl_semi_sync_master_enabled              | OFF        |
 7 | rpl_semi_sync_master_timeout              | 10000      |
 8 | rpl_semi_sync_master_trace_level          | 32         |
 9 | rpl_semi_sync_master_wait_for_slave_count | 2          |
10 | rpl_semi_sync_master_wait_no_slave        | ON         |
11 | rpl_semi_sync_master_wait_point           | AFTER_SYNC |
12  ------------------------------------------- ------------ 
13 6 rows in set (0.00 sec)
14 
15 //rpl_semi_sync_master_enabled --Specify whether to use the feature of semi-sync(master side,default "off").
16 //rpl_semi_sync_master_timeout --Specify the threshold of timeout between master and slave(default value is "10000" means 10s).
17 //rpl_semi_sync_master_trace_level --Specify the debug trace level on master(default "32",others "1","16","64").
18 //rpl_semi_sync_master_wait_for_slave_count --Specify how many slaves the master should wait when timeout happens(default "1").
19 //rpl_semi_sync_master_wait_no_slave --Specify whether the master switches to normal replication(default "on").When setting "on",it permits the amount of slave can be less than the value of "rpl_semi_sync_master_wait_for_slave_count" you specified and prevents it becoming normal replication.
20 //rpl_semi_sync_master_wait_point --Specify the ACK mode(default "after-sync").It's the most important variable of semi-sync.
21 
22 //Slave1
23 (zlm@192.168.1.102 3306)[(none)]>show variables like 'rpl_semi%';
24  --------------------------------- ------- 
25 | Variable_name                   | Value |
26  --------------------------------- ------- 
27 | rpl_semi_sync_slave_enabled     | OFF   |
28 | rpl_semi_sync_slave_trace_level | 32    |
29  --------------------------------- ------- 
30 2 rows in set (0.00 sec)
31 
32 //There're only two variables after install the rpl_semi_sync_slave plugin.
33 //rpl_semi_sync_slave_enabled -- Specify whether use the feature of semi-sync(slave side,default "off").
34 //rpl_semi_sync_slave_trace_level -- Specify the debug trace level on slave(default "32").

 

 

 

**Continue to skip error 1677 on master.**

 1 [root@zlm3 09:25:44 ~]
 2 #innobackupex --defaults-file=/data/mysql/mysql3308/my3308.cnf --user=root --password=Passw0rd --host=localhost -S /tmp/mysql3308.sock --port=3308 /data/backup
 3 xtrabackup: recognized server arguments: --datadir=/data/mysql/mysql3308/data --server-id=1023308 --open_files_limit=65536 --log_bin=/data/mysql/mysql3308/logs/mysql-bin --innodb_data_file_path=ibdata1:100M:autoextend --innodb_buffer_pool_filename=ib_buffer_pool --innodb_log_files_in_group=3 --innodb_log_file_size=100M --innodb_file_per_table=1 --innodb_open_files=65535 --innodb_page_size=16k --innodb_read_io_threads=4 --innodb_write_io_threads=4 --innodb_io_capacity=200 --innodb_doublewrite=1 --innodb_log_buffer_size=128M --innodb_flush_log_at_trx_commit=1 --innodb_buffer_pool_size=100M --innodb_flush_method=O_DIRECT 
 4 xtrabackup: recognized client arguments: --datadir=/data/mysql/mysql3308/data --server-id=1023308 --open_files_limit=65536 --log_bin=/data/mysql/mysql3308/logs/mysql-bin --innodb_data_file_path=ibdata1:100M:autoextend --innodb_buffer_pool_filename=ib_buffer_pool --innodb_log_files_in_group=3 --innodb_log_file_size=100M --innodb_file_per_table=1 --innodb_open_files=65535 --innodb_page_size=16k --innodb_read_io_threads=4 --innodb_write_io_threads=4 --innodb_io_capacity=200 --innodb_doublewrite=1 --innodb_log_buffer_size=128M --innodb_flush_log_at_trx_commit=1 --innodb_buffer_pool_size=100M --innodb_flush_method=O_DIRECT 
 5 180809 09:26:05 innobackupex: Starting the backup operation
 6 
 7 ... //Omitted.
 8 
 9 180809 09:26:17 Finished backing up non-InnoDB tables and files
10 180809 09:26:17 Executing LOCK BINLOG FOR BACKUP... //Here's the difference of lock mode between community and percona version of MySQL.
11 180809 09:26:17 [00] Writing /data/backup/2018-08-09_09-26-05/xtrabackup_binlog_info
12 180809 09:26:17 [00]        ...done
13 180809 09:26:17 Executing FLUSH NO_WRITE_TO_BINLOG ENGINE LOGS...
14 xtrabackup: The latest check point (for incremental): '2626843'
15 xtrabackup: Stopping log copying thread.
16 .180809 09:26:17 >> log scanned up to (2626852)
17 
18 180809 09:26:17 Executing UNLOCK BINLOG
19 180809 09:26:17 Executing UNLOCK TABLES
20 180809 09:26:17 All tables unlocked
21 180809 09:26:17 [00] Copying ib_buffer_pool to /data/backup/2018-08-09_09-26-05/ib_buffer_pool
22 180809 09:26:17 [00]        ...done
23 180809 09:26:17 Backup created in directory '/data/backup/2018-08-09_09-26-05/'
24 MySQL binlog position: filename 'mysql-bin.000023', position '1107', GTID of the last change '42aada54-65ea-ee17-55f0-b47cf387c038:1-23'
25 180809 09:26:17 [00] Writing /data/backup/2018-08-09_09-26-05/backup-my.cnf
26 180809 09:26:17 [00]        ...done
27 180809 09:26:17 [00] Writing /data/backup/2018-08-09_09-26-05/xtrabackup_info
28 180809 09:26:17 [00]        ...done
29 xtrabackup: Transaction log of lsn (2626827) to (2626852) was copied.
30 180809 09:26:17 completed OK!

**Stop slave on slave1 and record the execution time.**

 1 zlm@192.168.56.101:3306 [zlm]>show slave statusG
 2 *************************** 1. row ***************************
 3                Slave_IO_State: Waiting for master to send event
 4                   Master_Host: 192.168.56.100
 5                   Master_User: repl
 6                   Master_Port: 3306
 7                 Connect_Retry: 60
 8               Master_Log_File: mysql-bin.000091
 9           Read_Master_Log_Pos: 1241
10                Relay_Log_File: relay-bin.000032
11                 Relay_Log_Pos: 618
12         Relay_Master_Log_File: mysql-bin.000091
13              Slave_IO_Running: Yes
14             Slave_SQL_Running: No
15               Replicate_Do_DB: 
16           Replicate_Ignore_DB: 
17            Replicate_Do_Table: 
18        Replicate_Ignore_Table: 
19       Replicate_Wild_Do_Table: 
20   Replicate_Wild_Ignore_Table: 
21                    Last_Errno: 1050
22                    Last_Error: Error 'Table 'test' already exists' on query. Default database: 'zlm'. Query: 'create table test(
23 id int,
24 name varchar(10)
25 ) engine=innodb'
26                  Skip_Counter: 0
27           Exec_Master_Log_Pos: 405
28               Relay_Log_Space: 1908
29               Until_Condition: None
30                Until_Log_File: 
31                 Until_Log_Pos: 0
32            Master_SSL_Allowed: No
33            Master_SSL_CA_File: 
34            Master_SSL_CA_Path: 
35               Master_SSL_Cert: 
36             Master_SSL_Cipher: 
37                Master_SSL_Key: 
38         Seconds_Behind_Master: NULL
39 Master_SSL_Verify_Server_Cert: No
40                 Last_IO_Errno: 0
41                 Last_IO_Error: 
42                Last_SQL_Errno: 1050
43                Last_SQL_Error: Error 'Table 'test' already exists' on query. Default database: 'zlm'. Query: 'create table test(
44 id int,
45 name varchar(10)
46 ) engine=innodb'
47   Replicate_Ignore_Server_Ids: 
48              Master_Server_Id: 1003306
49                   Master_UUID: 2a4b3562-2ab6-11e8-be7a-080027de0e0e
50              Master_Info_File: /data/mysql/mysql3306/data/master.info
51                     SQL_Delay: 0
52           SQL_Remaining_Delay: NULL
53       Slave_SQL_Running_State: 
54            Master_Retry_Count: 86400
55                   Master_Bind: 
56       Last_IO_Error_Timestamp: 
57      Last_SQL_Error_Timestamp: 180721 13:35:31
58                Master_SSL_Crl: 
59            Master_SSL_Crlpath: 
60            Retrieved_Gtid_Set: 2a4b3562-2ab6-11e8-be7a-080027de0e0e:12715627-12715632
61             Executed_Gtid_Set: 27af30ca-6800-11e8-ad7e-080027de0e0e:1,
62 2a4b3562-2ab6-11e8-be7a-080027de0e0e:1-12715628
63                 Auto_Position: 1
64          Replicate_Rewrite_DB: 
65                  Channel_Name: 
66            Master_TLS_Version: 
67 1 row in set (0.00 sec)

 

Check the variables relevant to semi-sync replication.

 1 [root@zlm2 12:21:46 /data/mysql/mysql3306/data]
 2 #tail -f zlm2.log
 3 mysqld, Version: 5.7.21-log (MySQL Community Server (GPL)). started with:
 4 Tcp port: 3306  Unix socket: /var/lib/mysql/mysql.sock
 5 Time                 Id Command    Argument
 6 2018-07-21T10:21:14.049221Z       30 Query    stop slave
 7 2018-07-21T10:21:21.598248Z       30 Query    show slave status
 8 2018-07-21T10:21:27.080665Z       31 Query    SHOW SLAVE STATUS
 9 2018-07-21T10:21:27.081848Z       31 Query    START SLAVE
10 2018-07-21T10:21:27.084221Z       36 Connect Out    repl@192.168.56.100:3306
11 2018-07-21T10:21:28.086327Z       31 Query    SHOW SLAVE STATUS
12 2018-07-21T10:21:46.570310Z       35 Quit    
13 2018-07-21T10:22:02.782934Z       38 Connect    zlm@zlm2 on  using TCP/IP
14 2018-07-21T10:22:02.784208Z       38 Query    select @@version_comment limit 1
15 2018-07-21T10:22:02.785102Z       38 Query    select USER()
16 2018-07-21T10:22:10.440909Z       38 Query    show slave status
17 2018-07-21T10:22:14.535233Z       38 Query    show slave status
18 2018-07-21T10:22:32.087271Z       31 Query    SHOW SLAVE STATUS
19 ...

 

 

Do some operations on master.

Shutdown MySQL instance on zlm4.

 1 zlm@192.168.56.101:3306 [zlm]>show slave statusG
 2 *************************** 1. row ***************************
 3                Slave_IO_State: Waiting for master to send event
 4                   Master_Host: 192.168.56.100
 5                   Master_User: repl
 6                   Master_Port: 3306
 7                 Connect_Retry: 60
 8               Master_Log_File: mysql-bin.000091
 9           Read_Master_Log_Pos: 1241
10                Relay_Log_File: relay-bin.000032
11                 Relay_Log_Pos: 814
12         Relay_Master_Log_File: mysql-bin.000091
13              Slave_IO_Running: Yes
14             Slave_SQL_Running: No
15               Replicate_Do_DB: 
16           Replicate_Ignore_DB: 
17            Replicate_Do_Table: 
18        Replicate_Ignore_Table: 
19       Replicate_Wild_Do_Table: 
20   Replicate_Wild_Ignore_Table: 
21                    Last_Errno: 1068
22                    Last_Error: Error 'Multiple primary key defined' on query. Default database: 'zlm'. Query: 'alter table test add primary key(id)'
23                  Skip_Counter: 0
24           Exec_Master_Log_Pos: 601
25               Relay_Log_Space: 1908
26               Until_Condition: None
27                Until_Log_File: 
28                 Until_Log_Pos: 0
29            Master_SSL_Allowed: No
30            Master_SSL_CA_File: 
31            Master_SSL_CA_Path: 
32               Master_SSL_Cert: 
33             Master_SSL_Cipher: 
34                Master_SSL_Key: 
35         Seconds_Behind_Master: NULL
36 Master_SSL_Verify_Server_Cert: No
37                 Last_IO_Errno: 0
38                 Last_IO_Error: 
39                Last_SQL_Errno: 1068
40                Last_SQL_Error: Error 'Multiple primary key defined' on query. Default database: 'zlm'. Query: 'alter table test add primary key(id)'
41   Replicate_Ignore_Server_Ids: 
42              Master_Server_Id: 1003306
43                   Master_UUID: 2a4b3562-2ab6-11e8-be7a-080027de0e0e
44              Master_Info_File: /data/mysql/mysql3306/data/master.info
45                     SQL_Delay: 0
46           SQL_Remaining_Delay: NULL
47       Slave_SQL_Running_State: 
48            Master_Retry_Count: 86400
49                   Master_Bind: 
50       Last_IO_Error_Timestamp: 
51      Last_SQL_Error_Timestamp: 180721 13:39:43
52                Master_SSL_Crl: 
53            Master_SSL_Crlpath: 
54            Retrieved_Gtid_Set: 2a4b3562-2ab6-11e8-be7a-080027de0e0e:12715627-12715632
55             Executed_Gtid_Set: 27af30ca-6800-11e8-ad7e-080027de0e0e:1,
56 2a4b3562-2ab6-11e8-be7a-080027de0e0e:1-12715629
57                 Auto_Position: 1
58          Replicate_Rewrite_DB: 
59                  Channel_Name: 
60            Master_TLS_Version: 
61 1 row in set (0.00 sec)
62 
63 zlm@192.168.56.101:3306 [zlm]>show create table testG
64 *************************** 1. row ***************************
65        Table: test
66 Create Table: CREATE TABLE `test` (
67   `id` bigint(20) NOT NULL AUTO_INCREMENT,
68   `name` varchar(20) NOT NULL DEFAULT '',
69   PRIMARY KEY (`id`) //The table "test" had been added primary key what hit the error.
70 ) ENGINE=InnoDB AUTO_INCREMENT=100001 DEFAULT CHARSET=utf8mb4
71 1 row in set (0.00 sec)

 

 

 

 1 zlm@192.168.56.101:3306 [zlm]>show slave statusG
 2 *************************** 1. row ***************************
 3                Slave_IO_State: Waiting for master to send event
 4                   Master_Host: 192.168.56.100
 5                   Master_User: repl
 6                   Master_Port: 3306
 7                 Connect_Retry: 60
 8               Master_Log_File: mysql-bin.000091
 9           Read_Master_Log_Pos: 1241
10                Relay_Log_File: relay-bin.000032
11                 Relay_Log_Pos: 1454
12         Relay_Master_Log_File: mysql-bin.000091
13              Slave_IO_Running: Yes
14             Slave_SQL_Running: Yes //The SQL_Thread is normal now.No errors found.
15               Replicate_Do_DB: 
16           Replicate_Ignore_DB: 
17            Replicate_Do_Table: 
18        Replicate_Ignore_Table: 
19       Replicate_Wild_Do_Table: 
20   Replicate_Wild_Ignore_Table: 
21                    Last_Errno: 0
22                    Last_Error: 
23                  Skip_Counter: 0
24           Exec_Master_Log_Pos: 1241
25               Relay_Log_Space: 1908
26               Until_Condition: None
27                Until_Log_File: 
28                 Until_Log_Pos: 0
29            Master_SSL_Allowed: No
30            Master_SSL_CA_File: 
31            Master_SSL_CA_Path: 
32               Master_SSL_Cert: 
33             Master_SSL_Cipher: 
34                Master_SSL_Key: 
35         Seconds_Behind_Master: 0
36 Master_SSL_Verify_Server_Cert: No
37                 Last_IO_Errno: 0
38                 Last_IO_Error: 
39                Last_SQL_Errno: 0
40                Last_SQL_Error: 
41   Replicate_Ignore_Server_Ids: 
42              Master_Server_Id: 1003306
43                   Master_UUID: 2a4b3562-2ab6-11e8-be7a-080027de0e0e
44              Master_Info_File: /data/mysql/mysql3306/data/master.info
45                     SQL_Delay: 0
46           SQL_Remaining_Delay: NULL
47       Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
48            Master_Retry_Count: 86400
49                   Master_Bind: 
50       Last_IO_Error_Timestamp: 
51      Last_SQL_Error_Timestamp: 
52                Master_SSL_Crl: 
53            Master_SSL_Crlpath: 
54            Retrieved_Gtid_Set: 2a4b3562-2ab6-11e8-be7a-080027de0e0e:12715627-12715632
55             Executed_Gtid_Set: 27af30ca-6800-11e8-ad7e-080027de0e0e:1,
56 2a4b3562-2ab6-11e8-be7a-080027de0e0e:1-12715632
57                 Auto_Position: 1
58          Replicate_Rewrite_DB: 
59                  Channel_Name: 
60            Master_TLS_Version: 
61 1 row in set (0.01 sec)
62 
63 //Util now,we've skipped all the errors dynamically.But it doesn't guarantee the consistency of table "test" at all.

Implement a master-slave structure between node zlm3 and zlm4.

 

**Restore backup on node zlm4.**

1 pt-slave-restart [OPTIONS] [DSN]

 

**Continue to skip error 1068 on master.**

 

Summary

Modify the my3308.cnf file to restore the parameter of PXC.

1 [root@zlm1 13:50:42 ~]
2 #pt-slave-restart --recurse=0 --error-number=1677 -h192.168.56.101 -P3306 -urepl -prepl4slave
3 2018-07-21T13:59:24 P=3306,h=192.168.56.101,p=...,u=repl relay-bin.000032        1194 1677 
4 
5 //No more error appears anymore.

Preface

  • pt-slave-restart is tool use to avoid slave replication terminated accidentally due to different errors.
  • On account of "skip-slave-errors" is a static parameter,pt-slave-restart is more convenient to skip errors dynamically.
  • Unless you know the influence or consequences of the skipping operation.Don't skip any errors automatically.It's not safe to keep data consistency.
  • It's not recommended to use parameter "--aways",factitiously check and restart is more reliable.

 

 

1 [root@zlm3 09:31:07 ~]
2 #scp -r /data/backup/2018-08-09_09-26-05/ zlm4:/data/backup/
3 root@zlm4's password: 
4 xtrabackup_logfile                                                                                                 100% 2560     2.5KB/s   00:00    
5 ibdata1                                                                                                            100%  100MB  33.3MB/s   00:03    
6 plugin.ibd                                                                                                         100%   96KB  96.0KB/s   00:00    
7 servers.ibd                                                                                                        100%   96KB  96.0KB/s   00:00
8 ... //Omitted.

 

 1 [root@zlm2 09:08:15 ~]
 2 #mysql -uzlm -pzlmzlm -h192.168.1.101 -P3308
 3 mysql: [Warning] Using a password on the command line interface can be insecure.
 4 Welcome to the MySQL monitor.  Commands end with ; or g.
 5 Your MySQL connection id is 9
 6 Server version: 5.7.22-22-29.26-log Percona XtraDB Cluster binary (GPL) 5.7.22-29.26, Revision da86071, wsrep_29.26
 7 
 8 Copyright (c) 2009-2018 Percona LLC and/or its affiliates
 9 Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
10 
11 Oracle is a registered trademark of Oracle Corporation and/or its
12 affiliates. Other names may be trademarks of their respective
13 owners.
14 
15 Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
16 
17 (zlm@192.168.1.101 3308)[(none)]>select * from zlm.t1;
18  ---- ------------ 
19 | id | name       |
20  ---- ------------ 
21 |  1 | MySQL      |
22 |  2 | Oracle     |
23 |  3 | PostgreSQL |
24  ---- ------------ 
25 3 rows in set (0.00 sec)
26 
27 //The PXC is working normally now.

 

**Startup the mysqld on node zlm4.**

 

 1 [root@zlm4 11:10:28 /data/mysql/mysql3308]
 2 #vim my3308.cnf 
 3 
 4 [root@zlm4 11:11:03 /data/mysql/mysql3308]
 5 #cat my3308.cnf |grep wsrep
 6 loose-wsrep_cluster_name=pxc_wubx 
 7 loose-wsrep_cluster_address=gcomm://192.168.1.101,192.168.1.102,192.168.1.103
 8 loose-wsrep_node_address=192.168.1.103
 9 loose-wsrep_provider=/usr/local/mysql/lib/libgalera_smm.so
10 #loose-wsrep_sst_method=xtrabackup-v2
11 loose-wsrep_sst_method=rsync
12 loose-wsrep_sst_auth=sst:zlmzlm
13 #loose-wsrep_debug=on
14 #loose-wsrep_provider_options="debug=on"
1 [root@zlm1 13:35:31 ~]
2 #pt-slave-restart --recurse=0 --error-number=1050 -h192.168.56.101 -P3306 -urepl -prepl4slave
3 2018-07-21T13:39:43 P=3306,h=192.168.56.101,p=...,u=repl relay-bin.000032         618 1050 
4 2018-07-21T13:39:44 P=3306,h=192.168.56.101,p=...,u=repl relay-bin.000032         814 1068 
5 Error 1068 is not in --error-numbers.
  1 //Create a replication user on node zlm3.
  2 (zlm@192.168.1.102 3308)[zlm]>grant all privileges on *.* to repl@'192.168.1.%' identified by 'repl4slave';
  3 ERROR 1045 (28000): Access denied for user 'zlm'@'192.168.1.%' (using password: YES)
  4 (zlm@192.168.1.102 3308)[zlm]>q
  5 Bye
  6 
  7 [root@zlm3 10:11:28 /data/mysql/mysql3308/data]
  8 #mysql -uroot -pPassw0rd -hlocalhost -P3308
  9 mysql: [Warning] Using a password on the command line interface can be insecure.
 10 ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql3306.sock' (2)
 11 
 12 [root@zlm3 10:11:48 /data/mysql/mysql3308/data]
 13 #mysql -uroot -pPassw0rd -hlocalhost -P3308 -S /tmp/mysql3308.sock
 14 mysql: [Warning] Using a password on the command line interface can be insecure.
 15 Welcome to the MySQL monitor.  Commands end with ; or g.
 16 Your MySQL connection id is 8
 17 Server version: 5.7.22-22-29.26-log Percona XtraDB Cluster binary (GPL) 5.7.22-29.26, Revision da86071, wsrep_29.26
 18 
 19 Copyright (c) 2009-2018 Percona LLC and/or its affiliates
 20 Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
 21 
 22 Oracle is a registered trademark of Oracle Corporation and/or its
 23 affiliates. Other names may be trademarks of their respective
 24 owners.
 25 
 26 Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
 27 
 28 (root@localhost mysql3308.sock)[(none)]>grant all privileges on *.* to repl@'192.168.1.%' identified by 'repl4slave';
 29 Query OK, 0 rows affected, 1 warning (0.00 sec)
 30 
 31 (root@localhost mysql3308.sock)[(none)]>select user,host from mysql.user;
 32  --------------- ------------- 
 33 | user          | host        |
 34  --------------- ------------- 
 35 | repl          | 192.168.1.% |
 36 | zlm           | 192.168.1.% |
 37 | mysql.session | localhost   |
 38 | mysql.sys     | localhost   |
 39 | root          | localhost   |
 40 | sst           | localhost   |
 41  --------------- ------------- 
 42 6 rows in set (0.01 sec)
 43 
 44 //Execute "change master to ... " on node zlm4.
 45 [root@zlm4 10:14:37 /data/mysql/mysql3308]
 46 #mysql -uzlm -pzlmzlm -h192.168.1.103 -P3308
 47 mysql: [Warning] Using a password on the command line interface can be insecure.
 48 Welcome to the MySQL monitor.  Commands end with ; or g.
 49 Your MySQL connection id is 2
 50 Server version: 5.7.22-22-29.26-log Percona XtraDB Cluster binary (GPL) 5.7.22-29.26, Revision da86071, wsrep_29.26
 51 
 52 Copyright (c) 2009-2018 Percona LLC and/or its affiliates
 53 Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
 54 
 55 Oracle is a registered trademark of Oracle Corporation and/or its
 56 affiliates. Other names may be trademarks of their respective
 57 owners.
 58 
 59 Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
 60 
 61 (zlm@192.168.1.103 3308)[(none)]>change master to master_host='192.168.1.102',master_port=3308,master_user='repl',master_password='repl4slave',master_auto_position=1;
 62 Query OK, 0 rows affected, 1 warning (0.02 sec)
 63 
 64 (zlm@192.168.1.103 3308)[(none)]>start slave;
 65 Query OK, 0 rows affected (0.02 sec)
 66 
 67 (zlm@192.168.1.103 3308)[(none)]>show slave statusG
 68 *************************** 1. row ***************************
 69                Slave_IO_State: Waiting for master to send event
 70                   Master_Host: 192.168.1.102
 71                   Master_User: repl
 72                   Master_Port: 3308
 73                 Connect_Retry: 60
 74               Master_Log_File: mysql-bin.000023
 75           Read_Master_Log_Pos: 1397
 76                Relay_Log_File: zlm4-relay-bin.000002
 77                 Relay_Log_Pos: 367
 78         Relay_Master_Log_File: mysql-bin.000023
 79              Slave_IO_Running: Yes
 80             Slave_SQL_Running: No
 81               Replicate_Do_DB: 
 82           Replicate_Ignore_DB: 
 83            Replicate_Do_Table: 
 84        Replicate_Ignore_Table: 
 85       Replicate_Wild_Do_Table: 
 86   Replicate_Wild_Ignore_Table: 
 87                    Last_Errno: 1007
 88                    Last_Error: Coordinator stopped because there were error(s) in the worker(s). The most recent failure being: Worker 1 failed executing transaction '42aada54-65ea-ee17-55f0-b47cf387c038:20' at master log mysql-bin.000023, end_log_pos 350. See error log and/or performance_schema.replication_applier_status_by_worker table for more details about this failure or others, if any.
 89                  Skip_Counter: 0
 90           Exec_Master_Log_Pos: 194
 91               Relay_Log_Space: 1776
 92               Until_Condition: None
 93                Until_Log_File: 
 94                 Until_Log_Pos: 0
 95            Master_SSL_Allowed: No
 96            Master_SSL_CA_File: 
 97            Master_SSL_CA_Path: 
 98               Master_SSL_Cert: 
 99             Master_SSL_Cipher: 
100                Master_SSL_Key: 
101         Seconds_Behind_Master: NULL
102 Master_SSL_Verify_Server_Cert: No
103                 Last_IO_Errno: 0
104                 Last_IO_Error: 
105                Last_SQL_Errno: 1007
106                Last_SQL_Error: Coordinator stopped because there were error(s) in the worker(s). The most recent failure being: Worker 1 failed executing transaction '42aada54-65ea-ee17-55f0-b47cf387c038:20' at master log mysql-bin.000023, end_log_pos 350. See error log and/or performance_schema.replication_applier_status_by_worker table for more details about this failure or others, if any.
107   Replicate_Ignore_Server_Ids: 
108              Master_Server_Id: 1023308
109                   Master_UUID: 3ba41aa7-9b79-11e8-ad75-080027de0e0e
110              Master_Info_File: /data/mysql/mysql3308/data/master.info
111                     SQL_Delay: 0
112           SQL_Remaining_Delay: NULL
113       Slave_SQL_Running_State: 
114            Master_Retry_Count: 86400
115                   Master_Bind: 
116       Last_IO_Error_Timestamp: 
117      Last_SQL_Error_Timestamp: 180809 10:18:58
118                Master_SSL_Crl: 
119            Master_SSL_Crlpath: 
120            Retrieved_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:20-24
121             Executed_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:1-19
122                 Auto_Position: 1
123          Replicate_Rewrite_DB: 
124                  Channel_Name: 
125            Master_TLS_Version: 
126 1 row in set (0.00 sec)
127 
128 //The error log shows below.
129 2018-08-09T10:15:45.368412 01:00 2 [Warning] Neither --relay-log nor --relay-log-index were used; so replication may break when this MySQL server acts as a slave and has his hostname changed!! Please use '--relay-log=zlm4-relay-bin' to avoid this problem.
130 2018-08-09T10:15:45.382500 01:00 2 [Note] 'CHANGE MASTER TO FOR CHANNEL '' executed'. Previous state master_host='', master_port= 3306, master_log_file='', master_log_pos= 4, master_bind=''. New state master_host='192.168.1.102', master_port= 3308, master_log_file='', master_log_pos= 4, master_bind=''.
131 2018-08-09T10:18:58.164370 01:00 3 [Warning] Storing MySQL user name or password information in the master info repository is not secure and is therefore not recommended. Please consider using the USER and PASSWORD connection options for START SLAVE; see the 'START SLAVE Syntax' in the MySQL Manual for more information.
132 2018-08-09T10:18:58.173589 01:00 3 [Note] Slave I/O thread for channel '': connected to master 'repl@192.168.1.102:3308',replication started in log 'FIRST' at position 4
133 2018-08-09T10:18:58.180721 01:00 4 [Warning] Slave SQL for channel '': If a crash happens this configuration does not guarantee that the relay log info will be consistent, Error_code: 0
134 2018-08-09T10:18:58.180761 01:00 4 [Note] Slave SQL thread for channel '' initialized, starting replication in log 'FIRST' at position 0, relay log './zlm4-relay-bin.000001' position: 4
135 2018-08-09T10:18:58.202347 01:00 5 [ERROR] Slave SQL for channel '': Worker 1 failed executing transaction '42aada54-65ea-ee17-55f0-b47cf387c038:20' at master log mysql-bin.000023, end_log_pos 350; Error 'Can't create database 'zlm'; database exists' on query. Default database: 'zlm'. Query: 'create database zlm', Error_code: 1007
136 2018-08-09T10:18:58.202651 01:00 4 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log 'mysql-bin.000023' position 194
137 
138 //Check the "replication_applier_status_by_worker" table for detail.
139 (zlm@192.168.1.103 3308)[(none)]>select * from performance_schema.replication_applier_status_by_workerG
140 *************************** 1. row ***************************
141          CHANNEL_NAME: 
142             WORKER_ID: 1
143             THREAD_ID: NULL
144         SERVICE_STATE: OFF
145 LAST_SEEN_TRANSACTION: 42aada54-65ea-ee17-55f0-b47cf387c038:20
146     LAST_ERROR_NUMBER: 1007
147    LAST_ERROR_MESSAGE: Worker 1 failed executing transaction '42aada54-65ea-ee17-55f0-b47cf387c038:20' at master log mysql-bin.000023, end_log_pos 350; Error 'Can't create database 'zlm'; database exists' on query. Default database: 'zlm'. Query: 'create database zlm'
148  LAST_ERROR_TIMESTAMP: 2018-08-09 16:18:58
149 *************************** 2. row ***************************
150          CHANNEL_NAME: 
151             WORKER_ID: 2
152             THREAD_ID: NULL
153         SERVICE_STATE: OFF
154 LAST_SEEN_TRANSACTION: 
155     LAST_ERROR_NUMBER: 0
156    LAST_ERROR_MESSAGE: 
157  LAST_ERROR_TIMESTAMP: 0000-00-00 00:00:00
158 *************************** 3. row ***************************
159          CHANNEL_NAME: 
160             WORKER_ID: 3
161             THREAD_ID: NULL
162         SERVICE_STATE: OFF
163 LAST_SEEN_TRANSACTION: 
164     LAST_ERROR_NUMBER: 0
165    LAST_ERROR_MESSAGE: 
166  LAST_ERROR_TIMESTAMP: 0000-00-00 00:00:00
167 *************************** 4. row ***************************
168          CHANNEL_NAME: 
169             WORKER_ID: 4
170             THREAD_ID: NULL
171         SERVICE_STATE: OFF
172 LAST_SEEN_TRANSACTION: 
173     LAST_ERROR_NUMBER: 0
174    LAST_ERROR_MESSAGE: 
175  LAST_ERROR_TIMESTAMP: 0000-00-00 00:00:00
176 4 rows in set (0.00 sec)
177 
178 //Check the target database and table.
179 (zlm@192.168.1.103 3308)[(none)]>show databases;
180  -------------------- 
181 | Database           |
182  -------------------- 
183 | information_schema |
184 | mysql              |
185 | performance_schema |
186 | sys                |
187 | zlm                |
188  -------------------- 
189 5 rows in set (0.00 sec)
190 
191 (zlm@192.168.1.103 3308)[(none)]>use zlm
192 Reading table information for completion of table and column names
193 You can turn off this feature to get a quicker startup with -A
194 
195 Database changed
196 (zlm@192.168.1.103 3308)[zlm]>show tables;
197  --------------- 
198 | Tables_in_zlm |
199  --------------- 
200 | t1            |
201  --------------- 
202 1 row in set (0.00 sec)
203 
204 (zlm@192.168.1.103 3308)[zlm]>select * from t1;
205  ---- ------------ 
206 | id | name       |
207  ---- ------------ 
208 |  1 | MySQL      |
209 |  2 | Oracle     |
210 |  3 | PostgreSQL |
211  ---- ------------ 
212 3 rows in set (0.01 sec)
213 
214 //The changes on node zlm3 has been replicated to zlm4.
215 
216 [root@zlm4 10:35:51 /data/mysql/mysql3308/logs]
217 #ls -l
218 total 16
219 -rw-r----- 1 mysql mysql 194 Aug  9 08:00 mysql-bin.000024
220 -rw-r----- 1 mysql mysql 217 Aug  9 09:02 mysql-bin.000025
221 -rw-r----- 1 mysql mysql 194 Aug  9 10:08 mysql-bin.000026
222 -rw-r----- 1 mysql mysql 132 Aug  9 10:08 mysql-bin.index
223 
224 //No mysql-bin.000023 was found.Check the relay-log file.
225 [root@zlm4 10:38:16 /data/mysql/mysql3308/data]
226 #ls -l|grep relay
227 -rw-r----- 1 mysql mysql        58 Aug  9 10:18 relay-log.info
228 -rw-r----- 1 mysql mysql        84 Aug  9 10:18 worker-relay-log.info.1
229 -rw-r----- 1 mysql mysql        84 Aug  9 10:18 worker-relay-log.info.2
230 -rw-r----- 1 mysql mysql        84 Aug  9 10:18 worker-relay-log.info.3
231 -rw-r----- 1 mysql mysql        84 Aug  9 10:18 worker-relay-log.info.4
232 -rw-r----- 1 mysql mysql       206 Aug  9 10:18 zlm4-relay-bin.000001
233 -rw-r----- 1 mysql mysql      1570 Aug  9 10:18 zlm4-relay-bin.000002
234 -rw-r----- 1 mysql mysql        48 Aug  9 10:18 zlm4-relay-bin.index
235 
236 [root@zlm4 10:38:30 /data/mysql/mysql3308/data]
237 #mysqlbinlog -v --base64-output=decode-rows zlm4-relay-bin.000002 > ~/02.log
238 
239 [root@zlm4 10:38:46 /data/mysql/mysql3308/data]
240 #cd
241 
242 [root@zlm4 10:38:49 ~]
243 #cat 02.log 
244 /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/;
245 /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
246 DELIMITER /*!*/;
247 # at 4
248 #180809 10:18:58 server id 1033308  end_log_pos 123 CRC32 0x4367bb3e     Start: binlog v 4, server v 5.7.22-22-29.26-log created 180809 10:18:58
249 # This Format_description_event appears in a relay log and was generated by the slave thread.
250 # at 123
251 #180809 10:18:58 server id 1033308  end_log_pos 154 CRC32 0xf3605911     Previous-GTIDs
252 # [empty]
253 # at 154
254 #700101  1:00:00 server id 1023308  end_log_pos 0 CRC32 0xb5bcfbb7     Rotate to mysql-bin.000023  pos: 4
255 # at 201
256 #180809  4:09:22 server id 1023308  end_log_pos 123 CRC32 0x6f7e8565     Start: binlog v 4, server v 5.7.22-22-29.26-log created 180809  4:09:22 at startup
257 ROLLBACK/*!*/;
258 # at 320
259 #180809 10:18:58 server id 0  end_log_pos 367 CRC32 0xa757553d     Rotate to mysql-bin.000023  pos: 194
260 # at 367
261 #180809  9:07:52 server id 1023308  end_log_pos 259 CRC32 0x531076d3     GTID    last_committed=0    sequence_number=1    rbr_only=no
262 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:20'/*!*/;
263 # at 432
264 #180809  9:07:52 server id 1023308  end_log_pos 350 CRC32 0x9acb4e3f     Query    thread_id=5    exec_time=0    error_code=0
265 SET TIMESTAMP=1533798472/*!*/;
266 SET @@session.pseudo_thread_id=5/*!*/;
267 SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
268 SET @@session.sql_mode=1436549152/*!*/;
269 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
270 /*!C utf8 *//*!*/;
271 SET @@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=33/*!*/;
272 SET @@session.lc_time_names=0/*!*/;
273 SET @@session.collation_database=DEFAULT/*!*/;
274 create database zlm
275 /*!*/;
276 # at 523
277 #180809  9:08:36 server id 1023308  end_log_pos 415 CRC32 0xde316a34     GTID    last_committed=1    sequence_number=2    rbr_only=no
278 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:21'/*!*/;
279 # at 588
280 #180809  9:08:36 server id 1023308  end_log_pos 557 CRC32 0xb29bd4ab     Query    thread_id=5    exec_time=0    error_code=0
281 use `zlm`/*!*/;
282 SET TIMESTAMP=1533798516/*!*/;
283 create table t1(
284 id int,
285 name char(10)
286 ) engine=innodb charset=utf8mb4
287 /*!*/;
288 # at 730
289 #180809  9:13:42 server id 1023308  end_log_pos 622 CRC32 0x2a5f6414     GTID    last_committed=2    sequence_number=3    rbr_only=no
290 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:22'/*!*/;
291 # at 795
292 #180809  9:13:42 server id 1023308  end_log_pos 728 CRC32 0xa803e3aa     Query    thread_id=5    exec_time=0    error_code=0
293 SET TIMESTAMP=1533798822/*!*/;
294 alter table t1 add primary key(id)
295 /*!*/;
296 # at 901
297 #180809  9:13:46 server id 1023308  end_log_pos 793 CRC32 0xfd677245     GTID    last_committed=3    sequence_number=4    rbr_only=yes
298 /*!50718 SET TRANSACTION ISOLATION LEVEL READ COMMITTED*//*!*/;
299 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:23'/*!*/;
300 # at 966
301 #180809  9:13:46 server id 1023308  end_log_pos 869 CRC32 0x7b568d5a     Query    thread_id=5    exec_time=0    error_code=0
302 SET TIMESTAMP=1533798826/*!*/;
303 SET @@session.auto_increment_increment=2, @@session.auto_increment_offset=2/*!*/;
304 BEGIN
305 /*!*/;
306 # at 1042
307 # at 1128
308 #180809  9:13:46 server id 1023308  end_log_pos 1002 CRC32 0x8b4e5e6b     Table_map: `zlm`.`t1` mapped to number 110
309 # at 1175
310 #180809  9:13:46 server id 1023308  end_log_pos 1076 CRC32 0x51750bc0     Write_rows: table id 110 flags: STMT_END_F
311 ### INSERT INTO `zlm`.`t1`
312 ### SET
313 ###   @1=1
314 ###   @2='MySQL'
315 ### INSERT INTO `zlm`.`t1`
316 ### SET
317 ###   @1=2
318 ###   @2='Oracle'
319 ### INSERT INTO `zlm`.`t1`
320 ### SET
321 ###   @1=3
322 ###   @2='PostgreSQL'
323 # at 1249
324 #180809  9:13:46 server id 1023308  end_log_pos 1107 CRC32 0x6033f0ee     Xid = 26
325 COMMIT/*!*/;
326 # at 1280
327 #180809 10:12:07 server id 1023308  end_log_pos 1172 CRC32 0x66f4de8c     GTID    last_committed=4    sequence_number=5    rbr_only=no
328 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:24'/*!*/;
329 # at 1345
330 #180809 10:12:07 server id 1023308  end_log_pos 1397 CRC32 0x86665c03     Query    thread_id=8    exec_time=0    error_code=0
331 SET TIMESTAMP=1533802327/*!*/;
332 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
333 GRANT ALL PRIVILEGES ON *.* TO 'repl'@'192.168.1.%' IDENTIFIED WITH 'mysql_native_password' AS '*872ECE72A7EBAC6A183C90D7043D5F359BD85A9E'
334 /*!*/;
335 SET @@SESSION.GTID_NEXT= 'AUTOMATIC' /* added by mysqlbinlog */ /*!*/;
336 DELIMITER ;
337 # End of log file
338 /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
339 /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
340 
341 //Clean the value of variable "gtid_purged".
342 (zlm@192.168.1.103 3308)[(none)]>reset master;
343 Query OK, 0 rows affected (0.03 sec)
344 
345 (zlm@192.168.1.103 3308)[(none)]>set @@global.gtid_purged='42aada54-65ea-ee17-55f0-b47cf387c038:1-24';
346 Query OK, 0 rows affected (0.01 sec)
347 
348 (zlm@192.168.1.103 3308)[(none)]>start slave sql_thread;
349 Query OK, 0 rows affected (0.00 sec)
350 
351 (zlm@192.168.1.103 3308)[(none)]>show slave statusG
352 *************************** 1. row ***************************
353                Slave_IO_State: Waiting for master to send event
354                   Master_Host: 192.168.1.102
355                   Master_User: repl
356                   Master_Port: 3308
357                 Connect_Retry: 60
358               Master_Log_File: mysql-bin.000023
359           Read_Master_Log_Pos: 1397
360                Relay_Log_File: zlm4-relay-bin.000002
361                 Relay_Log_Pos: 1570
362         Relay_Master_Log_File: mysql-bin.000023
363              Slave_IO_Running: Yes
364             Slave_SQL_Running: Yes
365               Replicate_Do_DB: 
366           Replicate_Ignore_DB: 
367            Replicate_Do_Table: 
368        Replicate_Ignore_Table: 
369       Replicate_Wild_Do_Table: 
370   Replicate_Wild_Ignore_Table: 
371                    Last_Errno: 0
372                    Last_Error: 
373                  Skip_Counter: 0
374           Exec_Master_Log_Pos: 1397
375               Relay_Log_Space: 1776
376               Until_Condition: None
377                Until_Log_File: 
378                 Until_Log_Pos: 0
379            Master_SSL_Allowed: No
380            Master_SSL_CA_File: 
381            Master_SSL_CA_Path: 
382               Master_SSL_Cert: 
383             Master_SSL_Cipher: 
384                Master_SSL_Key: 
385         Seconds_Behind_Master: 0
386 Master_SSL_Verify_Server_Cert: No
387                 Last_IO_Errno: 0
388                 Last_IO_Error: 
389                Last_SQL_Errno: 0
390                Last_SQL_Error: 
391   Replicate_Ignore_Server_Ids: 
392              Master_Server_Id: 1023308
393                   Master_UUID: 3ba41aa7-9b79-11e8-ad75-080027de0e0e
394              Master_Info_File: /data/mysql/mysql3308/data/master.info
395                     SQL_Delay: 0
396           SQL_Remaining_Delay: NULL
397       Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
398            Master_Retry_Count: 86400
399                   Master_Bind: 
400       Last_IO_Error_Timestamp: 
401      Last_SQL_Error_Timestamp: 
402                Master_SSL_Crl: 
403            Master_SSL_Crlpath: 
404            Retrieved_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:20-24
405             Executed_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:1-24
406                 Auto_Position: 1
407          Replicate_Rewrite_DB: 
408                  Channel_Name: 
409            Master_TLS_Version: 
410 1 row in set (0.00 sec)

**Check the slave status on slave.**

 1 2018-08-09T07:23:32.568794 01:00 0 [Note] WSREP: Initiating SST/IST transfer on JOINER side (wsrep_sst_xtrabackup-v2 --role 'joiner' --address '192.168.1.103' --datadir '/data/mysql/mysql3308/data/' --defaults-file '/data/mysql/mysql3308/my3308.cnf' --defaults-group-suffix '' --parent '4433' --binlog '/data/mysql/mysql3308/logs/mysql-bin' )
 2 2018-08-09T07:23:33.225673 01:00 2 [Note] WSREP: Prepared SST/IST request: xtrabackup-v2|192.168.1.103:4444/xtrabackup_sst//1
 3 2018-08-09T07:23:33.225697 01:00 2 [Note] WSREP: Auto Increment Offset/Increment re-align with cluster membership change (Offset: 1 -> 3) (Increment: 1 -> 3)
 4 2018-08-09T07:23:33.225704 01:00 2 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
 5 2018-08-09T07:23:33.225721 01:00 2 [Note] WSREP: Assign initial position for certification: 22, protocol version: 3
 6 2018-08-09T07:23:33.225760 01:00 0 [Note] WSREP: Service thread queue flushed.
 7 2018-08-09T07:23:33.226619 01:00 2 [Note] WSREP: Check if state gap can be serviced using IST
 8 2018-08-09T07:23:33.226638 01:00 2 [Note] WSREP: Local UUID: 00000000-0000-0000-0000-000000000000 != Group UUID: bd5525ab-9a15-11e8-aa0f-4b830c783fc7
 9 2018-08-09T07:23:33.226677 01:00 2 [Note] WSREP: State gap can't be serviced using IST. Switching to SST
10 2018-08-09T07:23:33.226683 01:00 2 [Note] WSREP: Failed to prepare for incremental state transfer: Local state UUID (00000000-0000-0000-0000-000000000000) does not match group state UUID (bd5525ab-9a15-11e8-aa0f-4b830c783fc7): 1 (Operation not permitted)
11      at galera/src/replicator_str.cpp:prepare_for_IST():538. IST will be unavailable.
12 2018-08-09T07:23:33.228003 01:00 0 [Note] WSREP: Member 2.0 (zlm4) requested state transfer from '*any*'. Selected 0.0 (zlm2)(SYNCED) as donor.
13 2018-08-09T07:23:33.228029 01:00 0 [Note] WSREP: Shifting PRIMARY -> JOINER (TO: 22)
14 2018-08-09T07:23:33.228088 01:00 2 [Note] WSREP: Requesting state transfer: success, donor: 0
15 2018-08-09T07:23:33.228108 01:00 2 [Note] WSREP: GCache history reset: 00000000-0000-0000-0000-000000000000:0 -> bd5525ab-9a15-11e8-aa0f-4b830c783fc7:22
16     2018-08-09T05:23:33.781389Z WSREP_SST: [INFO] Proceeding with SST.........
17     2018-08-09T05:23:33.808866Z WSREP_SST: [INFO] ............Waiting for SST streaming to complete!
1 # A software update is available:
2 2018-07-21T12:18:15 P=3306,h=192.168.56.101,p=...,u=repl relay-bin.000030         407 0 
3 2018-07-21T12:21:27 P=3306,h=192.168.56.101,p=...,u=repl relay-bin.000031         407 0

 

 

 1 (zlm@192.168.1.103 3308)[(none)]>show slave statusG
 2 *************************** 1. row ***************************
 3                Slave_IO_State: 
 4                   Master_Host: 192.168.1.102
 5                   Master_User: repl
 6                   Master_Port: 3308
 7                 Connect_Retry: 60
 8               Master_Log_File: mysql-bin.000023
 9           Read_Master_Log_Pos: 1718
10                Relay_Log_File: zlm4-relay-bin.000003
11                 Relay_Log_Pos: 775
12         Relay_Master_Log_File: mysql-bin.000023
13              Slave_IO_Running: No
14             Slave_SQL_Running: No
15               Replicate_Do_DB: 
16           Replicate_Ignore_DB: 
17            Replicate_Do_Table: 
18        Replicate_Ignore_Table: 
19       Replicate_Wild_Do_Table: 
20   Replicate_Wild_Ignore_Table: 
21                    Last_Errno: 0
22                    Last_Error: 
23                  Skip_Counter: 0
24           Exec_Master_Log_Pos: 1718
25               Relay_Log_Space: 2831
26               Until_Condition: None
27                Until_Log_File: 
28                 Until_Log_Pos: 0
29            Master_SSL_Allowed: No
30            Master_SSL_CA_File: 
31            Master_SSL_CA_Path: 
32               Master_SSL_Cert: 
33             Master_SSL_Cipher: 
34                Master_SSL_Key: 
35         Seconds_Behind_Master: NULL
36 Master_SSL_Verify_Server_Cert: No
37                 Last_IO_Errno: 0
38                 Last_IO_Error: 
39                Last_SQL_Errno: 0
40                Last_SQL_Error: 
41   Replicate_Ignore_Server_Ids: 
42              Master_Server_Id: 0
43                   Master_UUID: 3ba41aa7-9b79-11e8-ad75-080027de0e0e
44              Master_Info_File: /data/mysql/mysql3308/data/master.info
45                     SQL_Delay: 0
46           SQL_Remaining_Delay: NULL
47       Slave_SQL_Running_State: 
48            Master_Retry_Count: 86400
49                   Master_Bind: 
50       Last_IO_Error_Timestamp: 
51      Last_SQL_Error_Timestamp: 
52                Master_SSL_Crl: 
53            Master_SSL_Crlpath: 
54            Retrieved_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:20-25
55             Executed_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:1-25
56                 Auto_Position: 1
57          Replicate_Rewrite_DB: 
58                  Channel_Name: 
59            Master_TLS_Version: 
60 1 row in set (0.00 sec)
61 
62 (zlm@192.168.1.103 3308)[(none)]>reset slave all;
63 Query OK, 0 rows affected (0.03 sec)
64 
65 (zlm@192.168.1.103 3308)[(none)]>show slave statusG
66 Empty set (0.00 sec)
67 
68 //This step is merely used to make the environment clean and tidy.It's not necessary.

**Check the general log of slave to see the details.**

 1 [root@zlm4 09:02:18 /data/mysql/mysql3308]
 2 #!ps
 3 ps aux|grep mysqld
 4 mysql     5367  0.2 21.9 1574708 223476 pts/0  Sl   08:00   0:07 mysqld --defaults-file=/data/mysql/mysql3308/my3308.cnf
 5 root      5809  0.0  0.0 112640   960 pts/0    R    09:02   0:00 grep --color=auto mysqld
 6 
 7 [root@zlm4 09:02:22 /data/mysql/mysql3308]
 8 #pkill mysqld
 9 
10 [root@zlm4 09:02:43 /data/mysql/mysql3308]
11 #!ps
12 ps aux|grep mysqld
13 root      5827  0.0  0.0 112640   960 pts/0    R    09:02   0:00 grep --color=auto mysqld
14 [1]   Done                    mysqld --defaults-file=/data/mysql/mysql3308/my3308.cnf

 

Insert a new record in table "t1" on node zlm3.

 

 

**Check the slave status one more time.**

**Check the slave status the fourth times.**

 

 1 zlm@192.168.56.100:3306 [zlm]>show tables;
 2  --------------- 
 3 | Tables_in_zlm |
 4  --------------- 
 5 | test_gbk      |
 6 | test_utf8     |
 7 | test_utf8mb4  |
 8  --------------- 
 9 3 rows in set (0.00 sec)
10 
11 zlm@192.168.56.100:3306 [zlm]>drop table test_gbk,test_utf8,test_utf8mb4;
12 Query OK, 0 rows affected (0.04 sec)
13 
14 zlm@192.168.56.100:3306 [zlm]>show tables;
15 Empty set (0.00 sec)
16 
17 zlm@192.168.56.100:3306 [zlm]>create table test(
18     -> id int,
19     -> name varchar(10)
20     -> ) engine=innodb;
21 Query OK, 0 rows affected (0.03 sec)
22 
23 zlm@192.168.56.100:3306 [zlm]>alter table test add primary key(id);
24 Query OK, 0 rows affected (0.01 sec)
25 Records: 0  Duplicates: 0  Warnings: 0
26 
27 zlm@192.168.56.100:3306 [zlm]>alter table test modify column id int unsigned not null auto_increment;
28 Query OK, 0 rows affected (0.02 sec)
29 Records: 0  Duplicates: 0  Warnings: 0
30 
31 zlm@192.168.56.100:3306 [zlm]>show create table testG
32 *************************** 1. row ***************************
33        Table: test
34 Create Table: CREATE TABLE `test` (
35   `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
36   `name` varchar(10) DEFAULT NULL,
37   PRIMARY KEY (`id`)
38 ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8
39 1 row in set (0.00 sec)
40 
41 zlm@192.168.56.100:3306 [zlm]>insert into test values(1,'zlm');
42 Query OK, 1 row affected (0.00 sec)
43 
44 zlm@192.168.56.100:3306 [zlm]>select * from test;
45  ---- ------ 
46 | id | name |
47  ---- ------ 
48 |  1 | zlm  |
49  ---- ------ 
50 1 row in set (0.00 sec)
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