MYSQL master-slave replication builds the entire process-explore key parameters that cannot be synchronized in real time, mysql master-slave
Reprinted please indicate the source: http://blog.csdn.net/guoyjoe/article/details/45873859
1. master database operations
1. Full Database Export
Mysqldump-h192.168.1.6 -- all-databases-uroot-proot -- opt -- add-drop-database -- add-drop-table -- events -- triggers -- routines -- default-character-set = utf8 -- master-data = 2 -- single-transaction -- complete-insert -- quote-names -- log-error =/gyj/mysqldump2015051_log>/gyj/backup_2015051_mysql
2. Obtain the binlog location of mysql during export.
(Head-50 backup_20150520.mysql or tail-50 backup_20150520.mysql)
---- Change master to MASTER_LOG_FILE = 'binlog. 100', MASTER_LOG_POS = 000001;
3. Copy the backup of the master database to the slave Database
[Root @ uubee6 gyj] # scp backup_2015051_mysql root@192.168.1.8:/gyj/
Ii. Slave database operations
1. Clear the standby database (retain information_schema, cece_schema, and mysql databases), and then import the data of the primary database.
Check whether the slow log is disabled: set global slow_query_log = off;
If the import is not disabled, the following ERROR occurs: ERROR 1580 (HY000) at line 3405: You cannot 'drop' a log table if logging is enabled.
Mysql-h192.168.1.8-uroot-proot </gyj/backup_20150520.mysql
Iii. master database operations
1. Create and copy users
Grant replication slave on *. * TO 'repl' @ '%' identified by 'slavepass ';
Iv. Slave database operations
1. Configure the connection to the master database in the slave database and run the following command:
CHANGE MASTER
MASTER_HOST = '1970. 168.1.6 ',
MASTER_USER = 'repl ',
MASTER_PASSWORD = 'slavepass ',
MASTER_PORT = 3306,
MASTER_LOG_FILE = 'binlog. 000001 ',
MASTER_LOG_POS = 529372,
MASTER_CONNECT_RETRY = 10;
2. Start slave Database
Mysql> start slave;
Query OK, 0 rows affected (0.01 sec)
3. query the slave status:
Mysql> show slave status \ G;
* *************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.6
Master_User: repl
Master_Port: 3306
Connect_Retry: 10
Master_Log_File: binlog.000001
Read_Master_Log_Pos: 657284
Relay_Log_File: relaylog.000002
Relay_Log_Pos: 128192
Relay_Master_Log_File: binlog.000001
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: 657284
Relay_Log_Space: 128358
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
Master_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: 101
Master_UUID: c811e75a-d875-11e4-8bb1-b083fede6c94
Master_Info_File:/u01/my3306/data/master.info
SQL _Delay: 0
SQL _Remaining_Delay: NULL
Slave_ SQL _Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
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
1 row in set (0.00 sec)
ERROR:
No query specified
V. Test
1. master database operations
Mysql> select * from t1;
+ ------ +
| Id |
+ ------ +
| 1 |
+ ------ +
1 row in set (0.00 sec)
Mysql> insert into t1 values (2 );
Query OK, 1 row affected (0.00 sec)
Mysql> commit;
Query OK, 0 rows affected (0.00 sec)
Mysql> select * from t1;
+ ------ +
| Id |
+ ------ +
| 1 |
| 2 |
+ ------ +
2 rows in set (0.00 sec)
2. Slave database operations
Mysql> select * from t1;
+ ------ +
| Id |
+ ------ +
| 1 |
+ ------ +
1 row in set (0.00 sec)
3. The slave database is not synchronized, But I operate flush logs in the slave database. The command can be synchronized!
4. Check the parameters of the master database:
Mysql> show variables like '% autocommit % ';
+ --------------- + ------- +
| Variable_name | Value |
+ --------------- + ------- +
| Autocommit | ON |
+ --------------- + ------- +
1 row in set (0.00 sec)
Mysql> show variables like '% innodb_flush_metho % ';
+ --------------------- + ---------- +
| Variable_name | Value |
+ --------------------- + ---------- +
| Innodb_flush_method | O_DIRECT |
+ --------------------- + ---------- +
1 row in set (0.00 sec)
Mysql> show variables like '% sync_binlog % ';
+ --------------- + ------- +
| Variable_name | Value |
+ --------------- + ------- +
| Sync_binlog | 100 |
+ --------------- + ------- +
1 row in set (0.00 sec)
5. Find the cause: sync_binlog = 100. Set the parameter sync_binlog to 1 in the master database !!!
Set global sync_binlog = 1; --- it is best to change the my. cnf configuration file permanently.
6. Write down several common commands
Reset master;
Show master status \ G;
Show binlog events in 'binlog. 100 ';
Flush logs;
