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This article mainly gives you a brief introduction to the mysql 5. 5. 17 configuration multi-instance tutorial. You can check the relevant professional terms on the Internet or find some related books to supplement it. We will not dabble here, so let's go straight to the topic. I hope that this article on mysql 5. 5. 17 configuration multi-instance tutorial can bring you some practical help.

1: create / data/3307/data

2:: modify my.cnf

# Example MySQL config file for medium systems.

#

# This is for a system with little memory (32m-64m) where MySQL plays

# an important part, or systems up to 128M where MySQL is used together with

# other programs (such as a web server)

#

# MySQL programs look for option files in a set of

# locations which depend on the deployment platform.

# You can copy this option file to one of those

# locations. For information about these locations, see:

# http://dev.mysql.com/doc/mysql/en/option-files.html

#

# In this file, you can use all long options that a program supports.

# If you want to know which options a program supports, run the program

# with the "--help" option.

# The following options will be passed to all MySQL clients

[client]

# password= your_password

Port= 3307

Socket= / data/3307/mysql.sock

# Here follows entries for some specific programs

# The MySQL server

[mysqld]

Port= 3307

Socket= / data/3307/mysql.sock

Basedir = / application/mysql

Datadir = / data/3307/data

Skip-external-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

# Don't listen on a TCP/IP port at all. This can be a security enhancement

# if all processes that need to connect to mysqld run on the same host.

# All interaction with mysqld must be made via Unix sockets or named pipes.

# Note that using this option without enabling named pipes on Windows

# (via the "enable-named-pipe" option) will render mysqld useless!

#

# skip-networking

# Replication Master Server (default)

# binary logging is required for replication

Log-bin=mysql-bin

# binary logging format-mixed recommended

Binlog_format=mixed

# required unique id between 1 and 2 ^ 32-1

# defaults to 1 if master-host is not set

# but will not function as a master if omitted

Server-id= 7

# Replication Slave (comment out master section to use this)

#

# To configure this host as a replication slave, you can choose between

# two methods:

#

# 1) Use the CHANGE MASTER TO command (fully described in our manual)-

# the syntax is:

#

# CHANGE MASTER TO MASTER_HOST=, MASTER_PORT=

# MASTER_USER=, MASTER_PASSWORD=

#

# where you replace, by quoted strings and

# by the master's port number (3306 by default)

#

# Example:

#

# CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306

# MASTER_USER='joe', MASTER_PASSWORD='secret'

#

# OR

#

# 2) Set the variables below. However, in case you choose this method, then

# start replication for the first time (even unsuccessfully, for example

# if you mistyped the password in master-password and the slave fails to

# connect), the slave will create a master.info file, and any later

# change in this file to the variables' values below will be ignored and

# overridden by the content of the master.info file, unless you shutdown

# the slave server, delete master.info and restart the slaver server.

# For that reason, you may want to leave the lines below untouched

# (commented) and instead use CHANGE MASTER TO (see above)

#

# required unique id between 2 and 2 ^ 32-1

# (and different from the master)

# defaults to 2 if master-host is set

# but will not function as a slave if omitted

# server-id = 2

#

# The replication master for this slave-required

# master-host =

#

# The username the slave will use for authentication when connecting

# to the master-required

# master-user =

#

# The password the slave will authenticate with when connecting to

# the master-required

# master-password =

#

# The port the master is listening on.

# optional-defaults to 3306

# master-port =

#

# binary logging-not required for slaves, but recommended

# log-bin=mysql-bin

# Uncomment the following if you are using InnoDB tables

# innodb_data_home_dir = / application/mysql/data

# innodb_data_file_path = ibdata1:10M:autoextend

# innodb_log_group_home_dir = / application/mysql/data

# You can set.. _ buffer_pool_size up to 50-80%

# of RAM but beware of setting memory usage too high

# innodb_buffer_pool_size = 16m

# innodb_additional_mem_pool_size = 2m

# Set.. _ log_file_size to 25% of buffer pool size

# innodb_log_file_size = 5m

# innodb_log_buffer_size = 8m

# innodb_flush_log_at_trx_commit = 1

# innodb_lock_wait_timeout = 50

[mysqld_safe]

Log-error=/data/3307/ilanni.err

Pid-file=/data/3307/ilanni.pid

[mysqldump]

Quick

Max_allowed_packet = 16m

[mysql]

No-auto-rehash

# Remove the next comment character if you are not familiar with SQL

# safe-updates

[myisamchk]

Key_buffer_size = 20m

Sort_buffer_size = 20m

Read_buffer = 2m

Write_buffer = 2m

[mysqlhotcopy]

Interactive-timeout

3: install multiple instances

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

This is because we initialize the option of adding-- user=mysql. Of course, this is also what we need, because it increases the security of mysql.

4: modify the database directory permissions of the mysql instance

Chown-R mysql:mysql / data/3307

5: start multiple instances

/ application/mysql/bin/mysqld_safe-defaults-file=/data/3307/my.cnf &

/ / stop multiple instances

/ application/mysql/bin/mysqladmin-uroot-p2017-S / data/3307/mysql.sock-P3308 shutdown

6: check whether the 3307 mysqld process is started

Ps aux | grep mysqld

7: log in to multiple instances

Mysql-uroot-p-S / data/3307/mysql.sock

Login succeeded

[root@test tmp] # mysql-uroot-p-S / data/3307/mysql.sock

Enter password:

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

Your MySQL connection id is 1

Server version: 5.5.17-log Source distribution

Copyright (c) 2000, 2011, 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 >

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