start slave 误删数据恢复

start slave 误删数据恢复

1，针对传统复制：start slave 可以指定sql线程的 end log file and position的：START SLAVE UNTIL sql_thread master_log_file='binlog.000002',master_log_pos=829090187; START SLAVE [SQL_THREAD] UNTIL MASTER_LOG_FILE = 'log_name', MASTER_LOG_POS = log_pos START SLAVE [SQL_THREAD] UNTIL RELAY_LOG_FILE = 'log_name', RELAY_LOG_POS = log_pos thread_type: IO_THREAD | SQL_THREAD 2，针对gtid复制：start slave 可以指定sql线程的sql_before_gtids的：start slave sql_thread until sql_before_gtids='9e912d2b-92f6-11e8-9747-0050568be82c:9791090';不过UNTIL语法不可以用在IO_THREAD上。

# 当获取到一个全新的备份后，进行如下操作： stop slave; reset slave all; reset master; change master to master_host='10.10.10.10',master_port=3306,master_user='mysqlsync',master_password='123456', master_log_file='mysql-bin.009044',master_log_pos=517587984; start slave io_thread; start slave sql_thread until master_log_file='mysql-bin.009161',master_log_pos=224619836;

案例如下：

root@10.10.10.10((none)) > stop slave;reset slave all;reset master;root@10.10.10.10((none)) >change master to master_host='10.10.10.20',master_port=3306,master_user='mysqlsync',master_password='123456', master_log_file='mysql-bin.000241',master_log_pos=669674886;root@10.10.10.10((none)) >start slave io_thread;root@10.10.10.10((none)) >start slave sql_thread until master_log_file='mysql-bin.000246',master_log_pos=228466573;root@10.10.10.10((none)) > show slave status\G*************************** 1. row *************************** Slave_IO_State: Master_Host: 10.10.10.20 Master_User: mysqlsync Master_Port: 3307 Connect_Retry: 60 Master_Log_File: mysql-bin.000250 Read_Master_Log_Pos: 161937975 Relay_Log_File: relay-bin.000016 Relay_Log_Pos: 228466778 Relay_Master_Log_File: mysql-bin.000246 Slave_IO_Running: No Slave_SQL_Running: No Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 228466573 Relay_Log_Space: 4479380022 Until_Condition: Master Until_Log_File: mysql-bin.000246 Until_Log_Pos: 228466573 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: NULLMaster_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 123456 Master_UUID: c2c56743-b3ba-11eb-adf3-e4434bdfe564 Master_Info_File: mysql.slave_master_info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0 Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version: 1 row in set (0.01 sec)Wed Aug 4 12:04:30 2021

如上：通过shwo slave status\G;观察这5个指标：

# 表示同步完成的一个标志，为yes表示正在同步，为no表示同步完成Slave_SQL_Running: No# 这两个指标表示同步主库的io线程同步主库binblog文件到哪个binlog文件了，至少保证Master_Log_File文件的编号大于Until_Log_File文件的编号Until_Log_File: mysql-bin.000246Master_Log_File: mysql-bin.000250# 这两个值要相等，相等表示同步完成的标志Until_Log_Pos: 228466573Exec_Master_Log_Pos: 228466573

work@hostname((none)) > reset slave all;reset master;SET @@GLOBAL.GTID_PURGED='1751c709-9e64-11ea-855e-e4434b034ad8:1-4301373';Query OK, 0 rows affected (0.00 sec)Query OK, 0 rows affected (0.01 sec)Query OK, 0 rows affected (0.13 sec)Wed Nov 4 15:20:08 2020work@hostname((none)) > change master to master_host='10.10.10.10',master_port=3306,master_user='sync',master_password='123456',master_auto_position=1;Query OK, 0 rows affected, 2 warnings (0.00 sec)Wed Nov 4 15:20:55 2020work@hostname((none)) > start slave io_thread;Query OK, 0 rows affected (0.01 sec)Wed Nov 4 15:21:08 2020work@hostname((none)) > start slave sql_thread until sql_before_gtids='1751c709-9e64-11ea-855e-e4434b034ad8:4315229';Query OK, 0 rows affected (0.00 sec)work@hostname((none)) > show slave status\G*************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 10.10.10.10 Master_User: mysqlsync Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000002 Read_Master_Log_Pos: 442173408 Relay_Log_File: relay-bin.000002 Relay_Log_Pos: 4401708 Relay_Master_Log_File: mysql-bin.000002 Slave_IO_Running: Yes Slave_SQL_Running: No Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 441864511 Relay_Log_Space: 4710798 Until_Condition: SQL_BEFORE_GTIDS Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: NULLMaster_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 177103670 Master_UUID: 1751c709-9e64-11ea-855e-e4434b034ad8 Master_Info_File: mysql.slave_master_info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: 1751c709-9e64-11ea-855e-e4434b034ad8:4301374-4316055 Executed_Gtid_Set: 1751c709-9e64-11ea-855e-e4434b034ad8:1-4315228,eddc13e2-1e6d-11eb-9b37-246e9691b550:1-10 Auto_Position: 1 Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version: 1 row in set (0.00 sec)Wed Nov 4 15:25:18 2020autopilot@c4-using-glc-db05.bj((none)) >

###########

################################################

版权声明：本文内容由网络用户投稿，版权归原作者所有，本站不拥有其著作权，亦不承担相应法律责任。如果您发现本站中有涉嫌抄袭或描述失实的内容，请联系我们jiasou666@gmail.com 处理，核实后本网站将在24小时内删除侵权内容。