mysql使用mysqld_multi部署单机多实例的方法教程_Mysql

一、mysql编译安装：
二、准备第一个多实例3307
三、准备第二个多实例3308
四、启动多实例
五、查看启动状态
六、停止多实例
七、各自登录mysql实例

前言

大家应该都有所体会，随着硬件层面的发展，linux系统多核已经是普通趋势，而mysql是单进程多线程，所以先天上对多进程的利用不是很高，虽然5.6版本已经在这方面改进很多，但是也没有达到100%，所以为了充分的利用系统资源，mysql有自己的补充，那就是可以部署多实例，一个实例一个端口。

mysqld_multi设计用于管理在同一台机器上运行的多个mysqld进程，这些进程使用不同的socket文件并监听在不同的端口上。mysqld_multi可以批量启动、关闭、或者报告这些mysqld进程的状态。

下面话不多说了，来一起看看详细的介绍吧。

一、mysql编译安装：

									cd /usr/local/src

									wget http://mirrors.sohu.com/mysql/MySQL-5.6/mysql-5.6.35-linux-glibc2.5-x86_64.tar.gz 

									tar zxvf mysql-5.6.35-linux-glibc2.5-x86_64.tar.gz

									mv mysql-5.6.35-linux-glibc2.5-x86_64 /usr/local/mysql

									cd /usr/local/mysql

									useradd mysql

									mkdir -p /data/mysql

									chown -R mysql:mysql /data/mysql

									./scripts/mysql_install_db --user=mysql --datadir=/data/mysql

									cp support-files/my-default.cnf /etc/my.cnf

									cp support-files/mysql.server /etc/init.d/mysqld

二、准备第一个多实例3307

2.1 创建目录：

									mkdir /usr/local/mysql3307

									chown -R mysql.mysql /usr/local/mysql3307/

									mkdir -p /data/mysql3307

									chown -R mysql.mysql /data/mysql3307

									mkdir -p /home/data/mysql3307/binlog

									chown -R mysql.mysql /home/data/mysql3307

2.2 配置文件

									[root@zhdya01 ~]# vim /etc/my.cnf

									# For advice on how to change settings please see

									# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html

									# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the

									# *** default location during install, and will be replaced if you

									# *** upgrade to a newer version of MySQL.

									[mysqld_multi]

									mysqld = /usr/local/mysql/bin/mysqld_safe

									mysqladmin =/usr/local/mysql/bin/mysqladmin

									log =/var/log/mysqld_multi.log

									[mysqld1]

									socket = /usr/local/mysql3307/mysql.sock

									port = 3307

									pid-file = /usr/local/mysql3307/mysql.pid

									datadir = /data/mysql3307

									log_bin=/home/data/mysql3307/binlog

									server-id = 1

									innodb_buffer_pool_size = 128M

									innodb_flush_log_at_trx_commit = 0

2.3 初始化数据库

1	`/usr/local/mysql/scripts/mysql_install_db` `--user=mysql --basedir=/usr/local/mysql` `--datadir=/data/mysql3307`

三、准备第二个多实例3308

3.1 创建目录：

									mkdir /usr/local/mysql3308

									chown -R mysql.mysql /usr/local/mysql3308/

									mkdir -p /data/mysql3308

									chown -R mysql.mysql /data/mysql3308

									mkdir -p /home/data/mysql3308/binlog

									chown -R mysql.mysql /home/data/mysql3308

3.2 配置文件

									[root@zhdya01 ~]# vim /etc/my.cnf

									# For advice on how to change settings please see

									# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html

									# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the

									# *** default location during install, and will be replaced if you

									# *** upgrade to a newer version of MySQL.

									[mysqld_multi]

									mysqld = /usr/local/mysql/bin/mysqld_safe

									mysqladmin =/usr/local/mysql/bin/mysqladmin

									log =/var/log/mysqld_multi.log

									[mysqld1]

									socket = /usr/local/mysql3307/mysql.sock

									port = 3307

									pid-file = /usr/local/mysql3307/mysql.pid

									datadir = /data/mysql3307

									log_bin=/home/data/mysql3307/binlog

									server-id = 1

									innodb_buffer_pool_size = 128M

									innodb_flush_log_at_trx_commit = 0

									[mysqld2]

									socket = /usr/local/mysql3308/mysql.sock

									port = 3308

									pid-file = /usr/local/mysql3308/mysql.pid

									datadir = /data/mysql3308

									log_bin=/home/data/mysql3308/binlog

									server-id = 2

									innodb_buffer_pool_size = 128M

									innodb_flush_log_at_trx_commit = 0

3.3 初始化数据库

1	`/usr/local/mysql/scripts/mysql_install_db` `--user=mysql --basedir=/usr/local/mysql` `--datadir=/data/mysql3308`

四、启动多实例

									/etc/init.d/mysqld start

									mysqld_multi --defaults-extra-file=/etc/my.cnf start 1,2

									[root@zhdya01 bin]# !net

									netstat -lntp -lntp

									Active Internet connections (only servers)

									Proto Recv-Q Send-Q Local Address  Foreign Address  State PID/Program name 

									tcp 0 0 0.0.0.0:22  0.0.0.0:*  LISTEN 1241/sshd

									tcp 0 0 127.0.0.1:25  0.0.0.0:*  LISTEN 2087/master

									tcp6 0 0 :::3306   :::*   LISTEN 4406/mysqld

									tcp6 0 0 :::3307   :::*   LISTEN 4197/mysqld

									tcp6 0 0 :::3308   :::*   LISTEN 3359/mysqld

									tcp6 0 0 :::8080   :::*   LISTEN 2222/java

									tcp6 0 0 :::22   :::*   LISTEN 1241/sshd

									tcp6 0 0 ::1:25   :::*   LISTEN 2087/master

五、查看启动状态

									[root@zhdya01 bin]# mysqld_multi --defaults-extra-file=/etc/my.cnf report

									Reporting MySQL servers

									MySQL server from group: mysqld1 is running

									MySQL server from group: mysqld2 is running

六、停止多实例

									[root@zhdya01 bin]# mysqld_multi --defaults-extra-file=/etc/my.cnf stop 1,2

									[root@zhdya01 bin]# mysqld_multi --defaults-extra-file=/etc/my.cnf report

									Reporting MySQL servers

									MySQL server from group: mysqld1 is not running

									MySQL server from group: mysqld2 is not running

七、各自登录mysql实例

									[root@zhdya01 bin]# mysql --socket=/usr/local/mysql3307/mysql.sock

									Welcome to the MySQL monitor. Commands end with ; or \g.

									Your MySQL connection id is 1

									Server version: 5.6.35-log MySQL Community Server (GPL)

									Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.

									Oracle is a registered trademark of Oracle Corporation and/or its

									affiliates. Other names may be trademarks of their respective

									owners.

									Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

									mysql>