標籤:設定 user int egrep 來講 value 主從 master event
1.Mysql雙主及多主同步實戰,互為主從
使用主主前提:
a.表的主鍵自增(M庫id1,3,5;M庫id 2,4,6)
準備:兩台機器,這裡用多執行個體來講解
第一台:
Ip:192.168.1.115
Port:3306
第二台:
Ip:192.168.1.115
Port:3307
1.1 第一台機器的操作
(1)配置3306的my.cnf設定檔添加開啟下面參數
[[email protected] ~]# egrep "\[mysqld]|auto_increment|log-bin|log-slave" /data/3306/my.cnf [mysqld]auto_increment_increment= 2 自增的間隔如1 3 5 間隔為2auto_increment_offset = 1 ID的初始位置log-bin = /data/3306/mysql-binlog-slave-updates
(2)重啟3306mysql資料庫服務
[[email protected] ~]# /data/3306/mysql stopStoping MySQL....[[email protected] ~]# /data/3306/mysql startStarting MySQL......
(3)配置同步參數
CHANGE MASTER TOMASTER_HOST=‘192.168.1.115‘, MASTER_PORT=3307,MASTER_USER=‘rep‘,MASTER_PASSWORD=‘123456‘;
提示:如果之前是主從同步想給改成雙主同步,我們要帶—master-data參數備份之前主庫的資料然後匯入到從庫。
例如,備份3306更新的資料
mysqldump -uroot -p123456 -S /data/3306/mysql.sock -A -B --master-data=2 --events >/opt/3306bak.sql
用—master-data 參數備份資料,在change master的時候就不用添加下面的參數了以及不用show master status;查看主庫的狀態查看binlog的位置了。
MASTER_LOG_FILE=‘mysql-bin.000004‘ MASTER_LOG_POS=1895
(4)啟動從庫同步開關並查看同步狀態
mysql> start slave;Query OK, 0 rows affected (0.00 sec)mysql> show slave status\G*************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.1.115 Master_User: rep Master_Port: 3307Connect_Retry: 60 Master_Log_File: mysql-bin.000004 Read_Master_Log_Pos: 1895 Relay_Log_File: relay-bin.000012Relay_Log_Pos: 1019Relay_Master_Log_File: mysql-bin.000004 Slave_IO_Running: YesSlave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: mysql 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: 1895 Relay_Log_Space: 1315 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: 0Master_SSL_Verify_Server_Cert: NoLast_IO_Errno: 0Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 21 row in set (0.00 sec)
1.2 第二台機器操作
第二台操作和第一台操作差不多
(1)配置3307的my.cnf設定檔添加開啟下面參數
[[email protected] ~]# egrep "\[mysqld]|auto_increment|log-bin|log-slave" /data/3307/my.cnf [mysqld]auto_increment_increment= 2auto_increment_offset = 2log-bin = /data/3307/mysql-binlog-slave-updates
(2)重啟3307mysql資料庫服務
[[email protected] ~]# /data/3307/mysql stopStoping MySQL....[[email protected] ~]# /data/3307/mysql startStarting MySQL......
(3)配置同步參數
CHANGE MASTER TOMASTER_HOST=‘192.168.1.115‘, MASTER_PORT=3306,MASTER_USER=‘rep‘,MASTER_PASSWORD=‘123456‘;
(4)啟動從庫同步開關並查看同步狀態
mysql> start slave;Query OK, 0 rows affected (0.00 sec)mysql> show slave status\G*************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.1.115 Master_User: rep Master_Port: 3306Connect_Retry: 60 Master_Log_File: mysql-bin.000015 Read_Master_Log_Pos: 1895 Relay_Log_File: relay-bin.000042Relay_Log_Pos: 1326Relay_Master_Log_File: mysql-bin.000015 Slave_IO_Running: YesSlave_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: 1895 Relay_Log_Space: 1622 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: 0Master_SSL_Verify_Server_Cert: NoLast_IO_Errno: 0Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 11 row in set (0.00 sec)
1.3 測試mysql資料庫主主(M-M)同步互為主從。
(1)3306主機資料庫操作
a.現在在linzhongniao庫裡建立student表
mysql> create table student(-> id int(4) not null AUTO_INCREMENT,-> name char(20) not null,-> primary key(id)-> );Query OK, 0 rows affected (0.01 sec)
b.在student表中插入三條資料
mysql> insert into student(name) values(‘nishishei‘);Query OK, 1 row affected (0.00 sec)mysql> insert into student(name) values(‘zhangsan‘);Query OK, 1 row affected (0.00 sec)mysql> insert into student(name) values(‘lisi‘);Query OK, 1 row affected (0.00 sec)
c.查看一下插入的資料
mysql> select * from student;+----+-----------+| id | name |+----+-----------+| 1 | nishishei || 3 | zhangsan || 5 | lisi |+----+-----------+1 rows in set (0.00 sec)
我們探索資料的ID的自增不是連續的,因為我們在3306主機的my.cnf設定了下面的參數,這兩個參數的意思是我ID欄位自增的開始位置為1以一次間隔為2的方式自增,所以我們上面插入的資料是以2為間隔自增的,那麼auto_increment_offset的值等於2 呢?當然auto_increment_increment參數的值也是可以設定的。
auto_increment_increment= 2 自增的間隔如1 3 5 間隔為2auto_increment_offset = 1 ID的初始位置
(2)接下來我們在3307主機的資料庫上也插入三條資料
mysql> use linzhongniao;Database changedmysql> insert into student(name) values(‘burenshi‘);Query OK, 1 row affected (0.00 sec)mysql> insert into student(name) values(‘liushishi‘);Query OK, 1 row affected (0.00 sec)mysql> insert into student(name) values(‘luhan‘);Query OK, 1 row affected (0.00 sec)
(3)查看一下插入的資料
mysql> select * from student;+----+-----------+| id | name |+----+-----------+| 1 | nishishei || 3 | zhangsan || 5 | lisi || 6 | burenshi || 8 | liushishi || 10 | luhan |+----+-----------+
我們看新插入的資料以6、8、10的形式自增,因為我們在3307主機的my.cnf設定檔中設定的auto_increment_increment參數的值等於2和auto_increment_offset的值等於2,設定這兩個參數的意思是以2為起始位置,2為間隔自增的。所以插入資料的id為6、8、10。
Mysql DBA 進階營運學習筆記-mysql雙主及多主同步過程