一台服务器上的mysql多实例

使用不同的配置文件,启动文件,数据文件,日志文件。

一般用法是在/data目录下按照端口来配置多实例:/data/{3306,3307}/data


vim /data/3306/my.cnf

<code>

[client]

port = 3306

socket = /data/3306/mysql.sock


[mysql]

no-auto-rehash


[mysqld]

user = mysql

port = 3306

socket = /data/3306/mysql.sock

basedir = /application/mysql

datadir = /data/3306/data

open_files_limit = 1024

back_log = 600

max_connections = 800

max_connect_errors = 3000

table_cache = 614

external-locking = FALSE

max_allowed_packet = 8M

sort_buffer_size = 1M

join_buffer_size = 1M

thread_cache_size = 100

thread_concurrency = 2

query_cache_size = 2M

query_cache_limit = 1M

query_cache_min_res_unit = 2K

default_table_type = InnoDB

thread_stack = 192K

transaction_isolation = READ-COMMITTED

tmp_table_size = 2M

max_heap_table_size = 2M

long_query_time = 1

log_long_format

log-error = /data/3306/error.log

log-slow-queries = /data/3306/slow.log

pid-file = /data/3306/mysql.pid

log-bin = /data/3306/mysql-bin

relay-log = /data/3306/relay-bin

relay-log-info-file = /data/3306/relay-log.info

binlog_cache_size = 1M

max_binlog_cache_size = 1M

max_binlog_size = 2M

expire_logs_days = 7

key_buffer_size = 16M

read_buffer_size = 1M

read_md_buffer_size = 1M

bulk_insert_buffer_size = 1M

myisam_sort_buffer_size = 1M

myisam_max_sort_file_size = 10G

myisam_max_extra_sort_file_size = 10G

myisam_repair_threads = 1

myisam_recover

lower_case_table_names = 1

skip-name-resolve

slave-skip-errors = 1032,1062

replicate-ignore-db=mysql


server-id = 1


innodb_additional_mem_pool_size = 4M

innodb_buffer_pool_size = 32M

innodb_data_file_path = ibdata1:128M:autoextend

innodb_file_io_threads = 4

innodb_thread_concurrency = 8

innodb_flush_log_at_trx_commit = 2

innodb_log_buffer_size = 2M

innodb_log_file_size = 4M

innodb_log_files_in_group = 3

innodb_max_dirty_pages_pct = 90

innodb_lock_wait_timeout = 120

innodb_file_per_table = 0


[mysqldump]

quick

max_allowed_packet = 2M


[mysqld_safe]

log-error = /data/3306/mysql_3306.err

pid-file = /data/3306/mysqld.pid

</code>



vim /data/3307/my.cnf

<code>

[client]

port = 3307

socket = /data/3307/mysql.sock


[mysql]

no-auto-rehash


[mysqld]

user = mysql

port = 3307

socket = /data/3307/mysql.sock

basedir = /application/mysql

datadir = /data/3307/data

open_files_limit = 1024

back_log = 600

max_connections = 800

max_connect_errors = 3000

table_cache = 614

external-locking = FALSE

max_allowed_packet = 8M

sort_buffer_size = 1M

join_buffer_size = 1M

thread_cache_size = 100

thread_concurrency = 2

query_cache_size = 2M

query_cache_limit = 1M

query_cache_min_res_unit = 2K

default_table_type = InnoDB

thread_stack = 192K

transaction_isolation = READ-COMMITTED

tmp_table_size = 2M

max_heap_table_size = 2M

#long_query_time = 1

log_long_format

#log-error = /data/3307/error.log

#log-slow-queries = /data/3307/slow.log

pid-file = /data/3307/mysql.pid

#log-bin = /data/3307/mysql-bin

relay-log = /data/3307/relay-bin

relay-log-info-file = /data/3307/relay-log.info

binlog_cache_size = 1M

max_binlog_cache_size = 1M

max_binlog_size = 2M

expire_logs_days = 7

key_buffer_size = 16M

read_buffer_size = 1M

read_md_buffer_size = 1M

bulk_insert_buffer_size = 1M

myisam_sort_buffer_size = 1M

myisam_max_sort_file_size = 10G

myisam_max_extra_sort_file_size = 10G

myisam_repair_threads = 1

myisam_recover

lower_case_table_names = 1

skip-name-resolve

slave-skip-errors = 1032,1062

replicate-ignore-db=mysql


server-id = 3


innodb_additional_mem_pool_size = 4M

innodb_buffer_pool_size = 32M

innodb_data_file_path = ibdata1:128M:autoextend

innodb_file_io_threads = 4

innodb_thread_concurrency = 8

innodb_flush_log_at_trx_commit = 2

innodb_log_buffer_size = 2M

innodb_log_file_size = 4M

innodb_log_files_in_group = 3

innodb_max_dirty_pages_pct = 90

innodb_lock_wait_timeout = 120

innodb_file_per_table = 0


[mysqldump]

quick

max_allowed_packet = 2M


[mysqld_safe]

log-error = /data/3307/mysql_3307.err

pid-file = /data/3307/mysqld.pid

</code>



vim /data/3306/mysql

<code>

#!/bin/bash

# this scripts is created by swolice


#init

port=3306

mysql_user="root"

mysql_pwd="root"

CmdPath="/application/mysql/bin"

mysql_sock="/data/${port}/mysql.sock"

#startup function

function_start_mysql()

{

    if [ ! -e "$mysql_sock" ]; then

        printf "Starting MYSQL....\n"

        /bin/sh ${CmdPath}/mysqld_safe --defaults-file=/data/${port}/my.cnf 2>&1 >/dev/null &

    else

        printf "MySQL is running...\n"

        exit

    fi

}


#stop function

function_stop_mysql()

{

    if [ ! -e "$mysql_sock" ]; then

        printf "MySQL is stopped....\n"

        exit

    else

        printf "Stoping MySQL....\n"

        #{CmdPath}/mysqladmin -u ${mysql_user} -p${mysql_pwd} -S /data/${port}/mysql.sock shutdown

    fi

}


#restart funciton

function_restart_mysql()

{

    function_stop_mysql

    sleep 2

    function_start_mysql

}


case $1 in

    start)

        function_start_mysql

        ;;

    stop)

        function_stop_mysql

        ;;

    restart)

        function_restart_mysql

        ;;

    *)

        printf "Usage: /data/${port}/mysql {start|stop|restart}\n"

esac

</code>



启动mysql的实质是:

mysqld_safe --defaults-file=/data/3306/my.cnf 2>&1 > /dev/null &

mysqladmin -u root -pPassword -S /data/3306/mysql.sock shutdown



chown -R mysql:mysql /data

find /data -type f -name mysql -exec chmod 700 {} \;

find /data -name mysql | xargs chmod 700


/application/mysql/scripts/mysql_install_db --basedir=/application/mysql --datadir=/data/3306/data --user=mysql

/application/mysql/scripts/mysql_install_db --basedir=/application/mysql --datadir=/data/3307/data --user=mysql


初始化数据库的主要目的就是创建基础的数据库我呢见,生成mysql数据库表等。。。


初始化数据库错误处理:

/usr/libexec/mysqld:unknown variable 'table_open_cache=4'

Installaton of system tables failed!

使用错了初始化数据库的命令,用了系统自带的/usr/bin/mysql_install_db出现的错误。


一个主机的多实例的mysql登录只能使用sock登录:

mysql -S /data/3306/mysql.sock -uroot -proot



mysqladmin -uroot -S /data/3306/mysql.sock password 'new password'


远程连接mysql使用方法:

mysql -uroot -proot -P3308 -h 10.0.55.61
























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