1.1 MySQL實例---多實例配置
1.1.1 多實例概述
多套後臺進程+線程+內存結構
多個端口，多個配置文件，多個日誌文件，多個socket，多個server_id
多套數據
##PS:安裝多實例前，首先確保MySQL數據庫已安裝，mysql安裝參考：http://blog.51cto.com/zhuzhiwei/2140683
1.1.2 準備多套配置文件
mkdir -p /data/330{7..9} #<=====創建多個目錄
================第一個實例===================
vim /data/3307/my.cnf
[mysqld]
basedir=/application/mysql
datadir=/data/3307/data
socket=/data/3307/mysql.sock
log-error=/data/3307/mysql.log
log-bin=/data/3307/mysql-bin
server-id=7
port=3307
[client]
socket=/data/3307/mysql.sock
================第二個實例===================
vim /data/3308/my.cnf
[mysqld]
basedir=/application/mysql
datadir=/data/3308/data
socket=/data/3308/mysql.sock
log-error=/data/3308/mysql.log
log-bin=/data/3308/mysql-bin
server-id=8
port=3308
[client]
socket=/data/3308/mysql.sock
================第三個實例===================
vim /data/3309/my.cnf
[mysqld]
basedir=/application/mysql
datadir=/data/3309/data
socket=/data/3309/mysql.sock
log-error=/data/3309/mysql.log
log-bin=/data/3309/mysql-bin
server-id=9
port=3309
[client]
socket=/data/3309/mysql.sock
=========================================
chown -R mysql.mysql /data/330* #<======將3個目錄授權給mysql用戶
1.1.3 初始化多套數據
/application/mysql/scripts/mysql_install_db --user=mysql --basedir=/application/mysql --datadir=/data/3307/data
=================================================================================
/application/mysql/scripts/mysql_install_db --user=mysql --basedir=/application/mysql --datadir=/data/3308/data
=================================================================================
/application/mysql/scripts/mysql_install_db --user=mysql --basedir=/application/mysql --datadir=/data/3309/data
=================================================================================
1.1.4 啓動多個實例
mysqld_safe --defaults-file=/data/3307/my.cnf &
====================================================================
mysqld_safe --defaults-file=/data/3308/my.cnf &
====================================================================
mysqld_safe --defaults-file=/data/3309/my.cnf &
====================================================================
1.1.5 啓動失敗處理
touch /data/3309/mysql.log
touch /data/3308/mysql.log
touch /data/3307/mysql.log
chown -R mysql.mysql /data/330*
再次啓動多個實例即可。
===============進入實例===============================
mysql -s /data/3307/mysql.sock #首次進入無密碼
mysql -s /data/3308/mysql.sock
mysql -s /data/3309/mysql.sock