MySql Slave
MySql Slave my.cnf
# cat /etc/my.cnf [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql server-id=2 default-storage-engine = InnoDB innodb_file_per_table = 1 mysql> show slave status; Empty set (0.00 sec)
MySql Database Restore
$ mysql -p mydb < mydb.sql
MySql Slave Change Master to
mysql> change master to master_host='master.mysql.com', master_user='replica', master_password='password', MASTER_LOG_FILE='mysql-bin.000002', MASTER_LOG_POS=461451;
MySql Slave Data Files
# ls -l /var/lib/mysql/ total 20552 -rw-rw---- 1 mysql mysql 10485760 Oct 5 11:55 ibdata1 -rw-rw---- 1 mysql mysql 5242880 Oct 5 11:55 ib_logfile0 -rw-rw---- 1 mysql mysql 5242880 Oct 5 11:30 ib_logfile1 -rw-rw---- 1 mysql mysql 75 Oct 5 11:56 master.info drwx------ 2 mysql mysql 4096 Oct 4 16:56 mysql -rw-rw---- 1 mysql mysql 235 Oct 5 11:56 mysqld-relay-bin.000004 -rw-rw---- 1 mysql mysql 26 Oct 5 11:56 mysqld-relay-bin.index srwxrwxrwx 1 mysql mysql 0 Oct 4 16:56 mysql.sock -rw-rw---- 1 mysql mysql 56 Oct 5 11:56 relay-log.info
MySql Slave master.info
# cat /var/lib/mysql/master.info 14 mysql-bin.000002 461451 master.mysql.com replica password 3306 60 0
MySql Slave relay-log.info
# cat /var/lib/mysql/relay-log.info ./mysqld-relay-bin.000002 16767 mysql-bin.000002 477983
MySql Slave Show Slave Status
when slave has been configured but is not (yet) runningmysql> show slave status \G *************************** 1. row *************************** Slave_IO_State: Master_Host: master.mysql.com Master_User: replica Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000002 Read_Master_Log_Pos: 461451 Relay_Log_File: mysqld-relay-bin.000001 Relay_Log_Pos: 4 Relay_Master_Log_File: mysql-bin.000002 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: 461451 Relay_Log_Space: 98 Until_Condition: None 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: NULL 1 row in set (0.00 sec)
MySql Slave Start
start the slavemysql> start slave;
stop the slave
mysql> stop slave;
MySql Slave Show Slave Status
when slave has been configured and started and is still runningmysql> show slave status \G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: master.mysql.com Master_User: replica Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000002 Read_Master_Log_Pos: 477983 Relay_Log_File: mysqld-relay-bin.000002 Relay_Log_Pos: 16767 Relay_Master_Log_File: mysql-bin.000002 Slave_IO_Running: Yes Slave_SQL_Running: Yes 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: 475080 Relay_Log_Space: 13864 Until_Condition: None 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: 0 1 row in set (0.00 sec)
MySql Slave Show Status
mysql> show status +-----------------------------------+-----------+ | Variable_name | Value | +-----------------------------------+-----------+ | Aborted_clients | 0 | | Aborted_connects | 9 | | Binlog_cache_disk_use | 0 | | Binlog_cache_use | 0 | | Bytes_received | 1436 | | Bytes_sent | 55976 | | Slave_open_temp_tables | 0 | | Slave_retried_transactions | 0 | | Slave_running | ON |
MySql Slave Processes
mysql> show processlist; | Id | User | Host | db | Command | Time | State | Info | -----------------------+------------------+ | 184 | system user | | NULL | Connect | 457 | Waiting for master to send event | 185 | system user | | NULL | Connect | 233 | Has read all relay log; waiting for the slave I/O thread to update it | NULL | 3 rows in set (0.00 sec)
REFERRERS
MySqlReplication
