一、源码包下载：http://download.softagency.net/MySQL/Downloads/MySQL-5.1/
二、编译安装
groupadd mysql useradd -r -g mysql mysql mkdir /data/mysql_multi/mysql_exa1/ cd /data/mysql_multi/mysql_exa1/ mkdir data binlog log mkdir /data/mysql_multi/mysql_exa2/ cd /data/mysql_multi/mysql_exa2/ mkdir data binlog log chown -R mysql:mysql /data/mysql_multi/mysql_exa2/ /data/mysql_multi/mysql_exa1/ cd /data/installs/mysql-5.1.73 ./configure --prefix=/usr/local/mysql5.1 --with-plugins=innobase,innodb_plugin,myisam #编译参数参考：http://dev.mysql.com/doc/refman/5.1/en/source-configuration-options.html make make install cd /usr/local/mysql5.1/bin/ ./mysql_install_db --user=mysql --basedir=/usr/local/mysql5.1 --datadir=/data/mysql_multi/mysql_exa1/data/ ./mysql_install_db --user=mysql --basedir=/usr/local/mysql5.1 --datadir=/data/mysql_multi/mysql_exa2/data/ cp -rp ../share/mysql/mysqld_multi.server /etc/init.d/mysql_multi #复制启动文件 vim /etc/init.d/mysql_multi #修改basedir 和 datadir
三、配置多实例
[mysqld_multi] mysqld = /usr/local/mysql5.1/bin/mysqld_safe mysqladmin = /usr/local/mysql5.1/bin/mysqladmin user = root #管理实例时指定的用户名和密码 password = 1234 [client] #port = 3306 #socket = /data/mysql_multi/mysql_exa1/mysql.sock [mysqld3307] server-id = 3307 port = 3307 socket = /data/mysql_multi/mysql_exa1/mysql.sock pid-file = /data/mysql_multi/mysql_exa1/mysql.pid datadir = /data/mysql_multi/mysql_exa1/data log-error = /data/mysql_multi/mysql_exa1/log/error.log long_query_time = 1 slow_query_log_file = /data/mysql_multi/mysql_exa1/log/slow-query.log log-bin = /data/mysql_multi/mysql_exa1/binlog/mysql-bin log-bin-index = /data/mysql_multi/mysql_exa1/binlog/mysql-bin.index expire_logs_days = 2 binlog_format=mixed skip-locking key_buffer_size = 16M max_allowed_packet = 1M table_open_cache = 64 sort_buffer_size = 512K net_buffer_length = 8K read_buffer_size = 256K read_rnd_buffer_size = 512K myisam_sort_buffer_size = 8M
innodb_buffer_pool_size = 1G
innodb_additional_mem_pool_size = 2M
#Set .._log_file_size to 25 % of buffer pool size
innodb_log_file_size = 80M
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 2
innodb_lock_wait_timeout = 50
innodb_file_per_table = 1
innodb_flush_method = O_DIRECT
innodb_file_io_threads = 4
[mysqld3308] server-id = 3308 port = 3308 socket = /data/mysql_multi/mysql_exa2/mysql.sock pid-file = /data/mysql_multi/mysql_exa2/mysql.pid datadir = /data/mysql_multi/mysql_exa2/data log-error = /data/mysql_multi/mysql_exa2/log/error.log long_query_time = 1 slow_query_log_file = /data/mysql_multi/mysql_exa2/log/slow-query.log log-bin = /data/mysql_multi/mysql_exa2/binlog/mysql-bin log-bin-index = /data/mysql_multi/mysql_exa2/binlog/mysql-bin.index expire_logs_days = 2 binlog_format=mixed skip-locking key_buffer_size = 16M max_allowed_packet = 1M table_open_cache = 64 sort_buffer_size = 512K net_buffer_length = 8K read_buffer_size = 256K read_rnd_buffer_size = 512K myisam_sort_buffer_size = 8M
innodb_buffer_pool_size = 1G
innodb_additional_mem_pool_size = 2M
#Set .._log_file_size to 25 % of buffer pool size
innodb_log_file_size = 80M
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 2
innodb_lock_wait_timeout = 50
innodb_file_per_table = 1
innodb_flush_method = O_DIRECT
innodb_file_io_threads = 4
[mysqldump] quick max_allowed_packet = 16M [mysql] no-auto-rehash [myisamchk] key_buffer_size = 20M sort_buffer_size = 20M read_buffer = 2M write_buffer = 2M [mysqlhotcopy] interactive-timeout
四、启动多实例
root@192.168.100.246:/usr/local/mysql5.1/bin# /etc/init.d/mysqld_multi start 3307 root@192.168.100.246:/usr/local/mysql5.1/bin# /etc/init.d/mysqld_multi start 3308 root@192.168.100.246:/usr/local/mysql5.1/bin# netstat -lntp | grep mysql tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 26218/mysqld tcp 0 0 0.0.0.0:3307 0.0.0.0:* LISTEN 31910/mysqld tcp 0 0 0.0.0.0:3308 0.0.0.0:* LISTEN 32154/mysqld
五、关闭多实例
5.1 分别设置密码
root@192.168.100.246:/usr/local/mysql5.1/bin# mysql -uroot -p -S /data/mysql_multi/mysql_exa1/mysql.sock #指定sock文件路径登录 Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 1 Server version: 5.1.73-log Source distribution Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. This software comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to modify and redistribute it under the GPL v2 license Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> set password=password('1234'); Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) root@192.168.100.246:/usr/local/mysql5.1/bin# mysql -uroot -p -S /data/mysql_multi/mysql_exa2/mysql.sock Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 1 Server version: 5.1.73-log Source distribution Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. This software comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to modify and redistribute it under the GPL v2 license Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> set password=password('1234'); Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec)
5.2 关闭实例
root@192.168.100.246:/usr/local/mysql5.1/bin# /etc/init.d/mysqld_multi stop 3307 root@192.168.100.246:/usr/local/mysql5.1/bin# /etc/init.d/mysqld_multi stop 3308 root@192.168.100.246:/usr/local/mysql5.1/bin# netstat -lntp | grep mysql tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 26218/mysqld
六、注意事项
a. mysql_multi.log默认路径：/usr/local/mysql5.1/share/mysqld_multi.log
b. 新加实例时，只需要在配置文件加上实例相关配置，启动实例即可，停止实例也类似
c. 多实例mysql数据库在本机登录必须指定socket登录，而在其他机器上，可以通过指定port登录