Mysqld_multi configure multiple MySQL instances

# This is an example of a my. cnf file for mysqld_multi.
# Usually this file is located in home dir ~ /. My. cnf or/etc/my. cnf
#
# Some important notes follow:
#
#1. COMMON USER
#
# Make sure that the MySQL user, who is stopping the mysqld services, has
# The same password to all MySQL servers being accessed by mysqld_multi.
# This user needs to have the 'shutdown _ priv'-privilege, but for security
# Reasons shoshould have no other privileges. It is advised that you create
# Common 'multi _ admin' user for all MySQL servers being controlled
# Mysqld_multi. Here is an example how to do it:
#
# Grant shutdown on *. * TO multi_admin @ localhost identified by 'Password'
#
# You will need to apply the above to all MySQL servers that are being
# Controlled by mysqld_multi. 'multi _ admin' will shutdown the servers
# Using 'mysqladmin'-binary, when' mysqld _ multi stop' is being called.
#
#2. PID-FILE
#
# If you are using mysqld_safe to start mysqld, make sure that every
# MySQL server has a separate pid-file. In order to use mysqld_safe
# Via mysqld_multi, you need to use two options:
#
# Mysqld =/path/to/mysqld_safe
# Ledir =/path/to/mysqld-binary/
#
# Ledir (library executable directory), is an option that only mysqld_safe
# Accepts, so you will get an error if you try to pass it to mysqld directly.
# For this reason you might want to use the above options within [mysqld #]
# Group directly.
#
#3. DATA DIRECTORY
#
# It is NOT advised to run your MySQL servers within the same data directory.
# You can do so, but please make sure to understand and deal with
# Underlying caveats. In short they are:
#-Speed penalty
#-Risk of table/data Partition uption
#-Data synchronising problems between the running servers
#-Heavily media (disk) bound
#-Relies on the system (external) file locking
#-Is not applicable with all table types. (Such as InnoDB)
# Trying so will end up with undesirable results.
#
# 4.TCP/ IP Port
#
# Every server requires one and it must be unique.
#
#5. [mysqld #] Groups
#
# In the example below the first and the second th mysqld group was
# Intentionally left out. You may have 'gaps 'in the config file. This
# Gives you more flexibility.
#
#6. MySQL Server User
#
# You can pass the user =... option inside [mysqld #] groups. This
# Can be very handy in some cases, but then you need to run mysqld_multi
# As UNIX root.
#
# 7.A Start-up Manage Script for mysqld_multi
#
# In the recent MySQL distributions you can find a file called
# Mysqld_multi.server.sh. It is a wrapper for mysqld_multi. This can
# Be used to start and stop multiple servers during boot and shutdown.
#
# You can place the file in/etc/init. d/mysqld_multi.server.sh and
# Make the needed symbolic links to it from various run levels
# (As per Linux/Unix standard). You may even replace
#/Etc/init. d/mysql. server script with it.
#
# Before using, you must create a my. cnf file either in/usr/my. cnf
# Or/root/. my. cnf and add the [mysqld_multi] and [mysqld #] groups.
#
# The script can be found from support-files/mysqld_multi.server.sh
# In MySQL distribution. (Verify the script before using)
#


[Mysqld_multi]
Mysqld =/usr/bin/mysqld_safe
Mysqladmin =/usr/bin/mysqladmin
User = multi_admin
Password = my_password


[Mysqld2]
Socket =/tmp/mysql. sock2
Port = 3307
Pid-file =/var/lib/mysql2/hostname. pid2
Datadir =/var/lib/mysql2
Language =/usr/share/mysql/english
User = unix_user1


[Mysqld3]
Mysqld =/path/to/mysqld_safe
Ledir =/path/to/mysqld-binary/
Mysqladmin =/path/to/mysqladmin
Socket =/tmp/mysql. sock3
Port = 3308
Pid-file =/var/lib/mysql3/hostname. pid3
Datadir =/var/lib/mysql3
Language =/usr/share/mysql/swedish
User = unix_user2


[Mysqld4]
Socket =/tmp/mysql. sock4
Port = 3309
Pid-file =/var/lib/mysql4/hostname. pid4
Datadir =/var/lib/mysql4
Language =/usr/share/mysql/estonia
User = unix_user3


[Mysqld6]
Socket =/tmp/mysql. sock6
Port = 3311
Pid-file =/var/lib/mysql6/hostname. pid6
Datadir =/var/lib/mysql6
Language =/usr/share/mysql/Japan
User = unix_user4