MySQL multi-instance learning notes

MySQL Multi-instance

The simple thing is to open several different service ports (such as 3306,3307, etc.) on a single machine to run multiple MySQL service processes, which provide their own services through different sockets that listen to different service ports

The function and problem of multi-instance

1. Efficient Use of servers

2. Conserve server resources

3, the resource of mutual preemption problem

Multi-instance application scenarios

1. Fund-tight Companies

2, concurrent access is not a particularly large business

3, the portal site application MySQL multi-instance scene

1. Create a MySQL multi-instance data file directory

First, turn off the single instance we started before.

[[email protected] ~]#/etc/init.d/mysqld stop

[Email protected] ~]# Mv/etc/init.d/mysqld/etc/init.d/dan.mysqld

[Email protected] ~]# mkdir-p/data/{3306,3307}/data

[Email protected] ~]# Tree/data

/data

|--3306

| '--data

'--3307

'--data

4 directories, 0 files

The multi-instance is done on the basis of our previous work order example, only in a single instance to

Ln-s/application/mysql-5.5.32//application/mysql This step is no longer to the following operation, this is not clear words can refer to the previous article installation, here will not repeat the operation

2. Create a MySQL multi-instance configuration file

[[email protected] ~]# vim /data/3306/my.cnf[client]port             = 3306socket           = /data/3306/mysql.sock[mysql]no-auto-rehash[mysqld]user    =  mysqlport    = 3306socket  = /data/3306/mysql.sockbasedir =  /application/mysqldatadir = /data/3306/dataopen_files_limit    = 1024back_ log = 600max_connections = 800max_connect_errors = 3000table_cache =  614external-locking = falsemax_allowed_packet =8msort_buffer_size = 1mjoin_buffer_ size = 1mthread_cache_size = 100thread_concurrency = 2query_cache_size =  2mquery_cache_limit = 1mquery_cache_min_res_unit = 2k#default_table_type =  innodbthread_stack =  192k#transaction_isolation = read-committedtmp_table_size = 2mmax_heap_table_size =  2mlong_query_time = 1#log_long_format#log-error = /data/3306/error.log# log-slow-queries = /data/3306/slow.logpid-file = /data/3306/mysql.pidlog-bin = / data/3306/mysql-binrelay-log = /data/3306/relay-binrelay-log-info-file = /data/3306/ relay-log.infobinlog_cache_size = 1mmax_binlog_cache_size = 1mmax_binlog_size =  2mexpire_logs_days = 7key_buffer_size = 16mread_buffer_size = 1mread_rnd_buffer_ size = 1mbulk_insert_buffer_size = 1mlower_case_table_names =  1skip-name-resolveslave-skip-errors = 1032,1062replicate-ignore-db=mysqlserver-id =  1innodb_additional_mem_pool_size = 4minnodb_buffer_pool_size = 32minnodb_data_file_path  = ibdata1:128m:autoextendinnodb_file_io_threadS = 4innodb_thread_concurrency = 8innodb_flush_log_at_trx_commit = 2innodb_log_ Buffer_size = 2minnodb_log_file_size = 4minnodb_log_files_in_group = 3innodb_max _dirty_pages_pct = 90innodb_lock_wait_timeout = 120innodb_file_per_table = 0[ Mysqldump]quickmax_allowed_packet = 2m[mysqld_safe]log-error=/data/3306/mysql_martin3306.errpid-file =/data/3306/mysqld.pidvim /data/3307/my.cnf[client]port             = 3307socket          = / data/3307/mysql.sock[mysql]no-auto-rehash[mysqld]user    = mysqlport     = 3307socket  = /data/3307/mysql.sockbasedir = /application/ mysqldatadir = /data/3307/dataopen_files_limit    = 1024back_log =  600max_connections =&nbSp;800max_connect_errors = 3000table_cache = 614external-locking = falsemax_ allowed_packet =8msort_buffer_size = 1mjoin_buffer_size = 1mthread_cache_size =  100thread_concurrency = 2query_cache_size = 2mquery_cache_limit = 1mquery_ cache_min_res_unit = 2k#default_table_type = innodbthread_stack = 192k# transaction_isolation = read-committedtmp_table_size = 2mmax_heap_table_size =  2m#long_query_time = 1#log_long_format#log-error = /data/3307/error.log#log-slow-queries  = /data/3307/slow.logpid-file = /data/3307/mysql.pid#log-bin = /data/3307/ mysql-binrelay-log = /data/3307/relay-binrelay-log-info-file = /data/3307/ relay-log.infobinlog_cache_size = 1mmax_binlog_cache_size = 1mmax_binlog_size =  2mexpire_logs_days = 7key_buffer_size = 16mread_buffer_size = 1mread_rnd_buffer_size = 1mbulk_insert_buffer_size  = 1mlower_case_table_names = 1skip-name-resolveslave-skip-errors =  1032,1062replicate-ignore-db=mysqlserver-id = 3innodb_additional_mem_pool_size = 4minnodb_ Buffer_pool_size = 32minnodb_data_file_path = ibdata1:128m:autoextendinnodb_file_io_ Threads = 4innodb_thread_concurrency = 8innodb_flush_log_at_trx_commit = 2innodb _log_buffer_size = 2minnodb_log_file_size = 4minnodb_log_files_in_group =  3innodb_max_dirty_pages_pct = 90innodb_lock_wait_timeout = 120innodb_file_per_table =  0[mysqldump]quickmax_allowed_packet = 2m[mysqld_safe]log-error=/data/3307/mysql_ Martin3307.errpid-file=/data/3307/mysqld.pid

3. Create a multi-instance startup script

[[email protected] ~]# vim /data/3306/mysql#!/bin/sh#initport=3306mysql_user= "Root" mysql_ Pwd= "123456" cmdpath= "/application/mysql/bin" mysql_sock= "/data/${port}/mysql.sock" #startup   Functionfunction_start_mysql () {    if [ ! -e  "$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   Functionfunction_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  functionfunction_restart_mysql () {     printf  "restarting mysql...\n"     function_stop_mysql     sleep 2    function_start_mysql}case $1 instart)     function_start_mysql;; Stop)     function_stop_mysql;; Restart)     function_restart_mysql;; *)     printf  "usage: /data/${port}/mysql {start|stop|restart}\n" Esac[[email  protected] ~]# vim /data/3307/mysql#!/bin/sh#initport=3307mysql_user= "root" mysql_pwd= " 123456 "cmdpath="/application/mysql/bin "mysql_sock="/data/${port}/mysql.sock "#startup  functioNfunction_start_mysql () {    if [ ! -e  "$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   Functionfunction_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&nbSP;/DATA/${PORT}/MYSQL.SOCK SHUTDOWN   FI} #restart  functionfunction_restart_mysql () {     printf  "restarting mysql...\n"     function_stop_mysql     sleep 2    function_start_mysql}case $1 instart)     function_start_mysql;; Stop)     function_stop_mysql;; Restart)     function_restart_mysql;; *)     printf  "usage: /data/${port}/mysql {start|stop|restart}\n" Esac[[email  protected] ~]# tree /data/data|-- 3306|   |-- data|    |-- my.cnf|    '-- mysql '-- 3307    |-- data     |-- my.cnf     '-- mysql4 directories, 4 files[[ Email protected] ~]# chown -r mysql.mysql /data[[email protected] ~]# find /data -type f -name  "MySQL" |xargs ls - L-rw-r--r--.  1 mysql mysql 1018 jun 14 01:04 /data/3306/ Mysql-rw-r--r--.  1 mysql mysql 1017 jun 14 01:01 /data/3307/mysql[[ email protected] ~]# find /data -type f -name  "MySQL" |xargs chmod  700 [[email protected] ~]# find /data -type f -name  "MySQL" |XARGS LS -L     -RWX------.  1 mysql mysql 1018  JUN 14 01:04 /DATA/3306/MYSQL-RWX------.  1 mysql mysql 1017 Jun  14 01:01 /data/3307/mysql

4. Initialize the database

[Email protected] mysql-5.5.32]# Cd/application/mysql/scripts/[[email protected] scripts]#./mysql_install_db-- basedir=/application/mysql/--datadir=/data/3306/data/--user=mysql[[email protected] scripts]#./mysql_install_db- -basedir=/application/mysql/--datadir=/data/3307/data/--user=mysql

5. Start the database

[[Email protected] scripts]# /data/3306/mysql startstarting mysql ... [[Email protected] scripts]# /data/3307/mysql start starting mysql ... [[Email protected] scripts]# ss -lantup|grep 330tcp    listen      0      128                     *:3306                   *:*        users: (("mysqld", 20906,12)) tcp    listen      0      128                     *:3307                   *:*       users: (("mysqld", 21624,11) 

6. Login Database Test

[[Email protected] scripts]# mysql -s /data/3306/mysql.sock welcome to  the MySQL monitor.  Commands end with ; or \g.Your  mysql connection id is 1server version: 5.5.32-log source  distributioncopyright  (c)  2000, 2013, Oracle and/or its affiliates.  All rights reserved. oracle is a registered trademark of oracle corporation and/or  Itsaffiliates. other names may be trademarks of their respectiveowners . type  ' help; '  or  ' \h '  for help. Type  ' \c '  to clear the current input  statement.mysql> [[email protected] scripts]# mysql -s /data/3307/ Mysql.sock  welcome to the mysql monitor.  commands end&nBsp;with ; or \g.your mysql connection id is 1server version:  5.5.32 Source distributionCopyright  (c)  2000, 2013, oracle and/or  its affiliates. all rights reserved. oracle is a registered trademark of oracle corporation and/or  Itsaffiliates. other names may be trademarks of their respectiveowners . type  ' help; '  or  ' \h '  for help. Type  ' \c '  to clear the current input  statement.

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7, two databases are successful, you can create an instance 3308, here is no longer operation, simple look at the final effect

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This article from "Thick tak" blog, declined reprint!

MySQL multi-instance learning notes