Mysql 5.6 Master-Slave synchronization configuration and solution

Main Library ip:192.168.1.10

From library ip:192.168.1.11

1, the main library configuration Editor my.cnf:

= mysql-binserver-ID111log-bin-index=mysql-bin.indexsync_binlog= 1 Binlog_format=mixedbinlog-do-db =  testdb//Synchronize database Binlog-ignore-db = Mysqlbinlog-ignore-db = performance_schemabinlog-ignore-db = Information_schemabinlog_ Checksum=none

2. Create a Sync Account

mysql> grant replication Slave on * * to [email protected]192.168. 1.11 ' 123456 '

3. Main Library status

mysql> flush Privileges;mysql> show Master Status; +------------------+----------+--------------+------------------+| File             | Position | binlog_do_db | binlog_ignore_db |+------------------+----------+--------------+------------------+| Mysql-bin. 000008 |      337 |              |                  | +------------------+----------+--------------+------------------+

Record the binary log file name and location

4. configuration file from library

# [must] enable binary log-bin=mysql-bin   # [must] server unique ID, default is 1, usually take IP last segment server-id=222 relay-log-index = slave-relay-bin.indexrelay-log = slave-relay-1  1  1

5. Configure the connection main Library

mysql> Change Master to master_host='192.168.1.10', master_user='slave  ', master_password='123456', master_log_file='  mysql-bin.000008', master_log_pos=337;

6. Start syncing

mysql> start slave;mysql> show slave status\g;

7. Normal state

Slave_IO_Running:YesSlave_SQL_Running:Yes

8, solve the master never sync

First on the Master library:

Mysql>show processlist; See if the next process is too much sleep. Found to be normal.

Show master status; also normal.

Mysql> Show master status;
+-------------------+----------+--------------+-------------------------------+
| File | Position | binlog_do_db | binlog_ignore_db |
+-------------------+----------+--------------+-------------------------------+
|     mysqld-bin.000001 |              3260 | | Mysql,test,information_schema |
+-------------------+----------+--------------+-------------------------------+
1 row in Set (0.00 sec)

Go to the slave and check it out.

Mysql> Show Slave Status\g

Slave_io_running:yes

Slave_sql_running:no

Visible is slave different steps

Two workarounds are described below:

Method one: After ignoring the error, continue syncing

This method is applicable to the case that the data of master-slave database is not very different, or the data can not be completely unified, the data requirements are not strict.

Solve:

Stop slave;

#表示跳过一步错误, the following numbers are variable

Set global sql_slave_skip_counter = 1;

Start slave;

Then use mysql> Show slave status\g to view:

Slave_io_running:yes

Slave_sql_running:yes

OK, now the master-slave synchronization status is normal

Mode two: Re-master from, fully synchronized

This method is suitable for the case that the master-slave database data is large or the data is completely unified.

The steps to resolve are as follows:

1. Advanced Master Library, lock table, prevent data write

Use the command:

Mysql> flush tables with read lock;

Note: This is locked to a read-only state, and the statement is case insensitive

2. Perform data backup

#把数据备份到mysql. bak.sql file

[[email protected] MySQL] #mysqldump-uroot-p-hlocalhost > Mysql.bak.sql

Note here: Database backups must be done regularly to ensure that data is foolproof

3. View Master Status

Mysql> Show master status;
+-------------------+----------+--------------+-------------------------------+
| File | Position | binlog_do_db | binlog_ignore_db |
+-------------------+----------+--------------+-------------------------------+
|     mysqld-bin.000001 |              3260 | | Mysql,test,information_schema |
+-------------------+----------+--------------+-------------------------------+
1 row in Set (0.00 sec)

4. Upload the MySQL backup file to the slave library for data recovery

#使用scp命令

[Email protected] mysql]# SCP mysql.bak.sql [email protected]:/tmp/

5. Stop the state from the library

mysql> stop Slave;

6. Then run the MySQL command from the library, import the data backup

Mysql> Source/tmp/mysql.bak.sql

7. Set synchronization from the library, note that the synchronization point is in the main library show Master status information | file| Position two items

Change Master to Master_host = ' 192.168.128.10 ', master_user = ' slave ', master_port=3306, master_password= ' 123456 ', maste R_log_file = ' mysqld-bin.000001 ', master_log_pos=3260;

8. Re-open from sync

mysql> start slave;

9. View sync Status

Mysql> Show slave status\g View:

Slave_io_running:yes

Slave_sql_running:yes

Mysql 5.6 Master-Slave synchronization configuration and solution