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Mysql的实时同步

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Release: 2016-06-07 15:19:43
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欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入 设置方法: 步一 设 A 服务服 (192.168.1.43) 上 用户为 backup, 123456 , 同步的数据库为test; B 服务服 (192.168.1.23) 上 用户为 root, 123456, 同步的数据库为test; 步二 配置 mysql.ini: A服务

欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入

  设置方法:

  步一 设

  A 服务服 (192.168.1.43) 上 用户为 backup, 123456 , 同步的数据库为test;

  B 服务服 (192.168.1.23) 上 用户为 root, 123456, 同步的数据库为test;

  步二 配置 mysql.ini:

  A服务器

  #Replication master

  server-id = 10

  log-bin="E:/MySQL/logs/mysql_binary_log"

  binlog-do-db=test

  binlog-Ignore-db=information_schema

  # 单向备份时 A只需上面部分 B只需下面部分 下面部分同样需加server-id

  # Replication slave

  master-host="192.168.1.23"

  master-user=root

  master-password="123456"

  master-port=3306

  master-connect-retry=60

  replicate-do-db=test

  replicate-Ignore-db=information_schema

  B服务器

  #Replication master

  server-id = 2

  log-bin="c:/mysql5/logs/mysql_binary_log"

  binlog-do-db=test

  binlog-Ignore-db=information_schema

  # Replication slave

  master-host="192.168.1.43"

  master-user=backup

  master-password=123456

  master-port=3306

  master-connect-retry=60

  replicate-do-db=test

  replicate-Ignore-db=information_schema

  =============================================================

  解释:

  3)binlog-do-db=test 表示需要备份的数据库是test这个数据库,

  如果需要备份多个数据库,那么应该写多行,如下所示:

  binlog-do-db=backup1

  binlog-do-db=backup2

  binlog-do-db=backup3

  解释:

  1) server-id=2表示本机器的序号, A,B的server-id 不能相同;

  2)log-bin表示打开binlog,打开该选项才可以通过I/O写到Slave的relay-log,也是可以进行replication的前提;

  其中mysql_binary_log是日志文件的名称,mysql将建立不同扩展名,文件名为mysql_binary_log的几个日志文件.

  3) master-host="192.168.1.23" 表示A做slave时的master为192.168.1.23;

  4) master-user=root 这里表示master上开放的一个有权限的用户,使其可以从slave连接到master并进行复制;

  5) master-password=123456 表示授权用户的密码;

  6) master-port=3306 master上MySQL服务Listen3306端口;

  7) master-connect-retry=60 同步间隔时间;

  8) replicate-do-db=test 表示同步backup数据库;

  最后重新启动两台机器的mysql.

  ------------------------------------------------

  查看状态 及调试

  1,查看master的状态

  SHOW MASTER STATUS;

  Position 不应为0

  2,查看slave的状态

  show slave status;

  Slave_IO_Running | Slave_SQL_Running 这两个字段 应为 YES|YES.

  show processlist;

  会有两条记录与同步有关 state为 Has read all relay log; waiting for the slave I/O thread to update it

  和s Waiting for master to send event .

  3,错误日志

  MySQL安装目录dataHostname.err

  主服务器上的相关命令:

  show master status

  show slave hosts

  show {master|binary} logs

  show binlog events

  purge {master|binary} logs to ’log_name’

  purge {master|binary} logs before ’date’

  reset master(老版本flush master)

  set sql_log_bin={0|1}

  -----------------------------------------------------------------------------------

  从服务器上的相关命令:

  slave start

  slave stop

  SLAVE STOP IO_THREAD //此线程把master段的日志写到本地

  SLAVE start IO_THREAD

  SLAVE STOP SQL_THREAD //此线程把写到本地的日志应用于数据库

  SLAVE start SQL_THREAD

  reset slave

  SET GLOBAL SQL_SLAVE_SKIP_COUNTER

  load data from master

  show slave status(SUPER,REPLICATION CLIENT)

  CHANGE MASTER TO MASTER_HOST=, MASTER_PORT=,MASTER_USER=, MASTER_PASSWORD= //动态改变master信息

  PURGE MASTER [before ’date’] 删除master端已同步过的日志

Mysql的实时同步

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