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Old 01-26-2007, 07:35 AM   #1
BarryLinux
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Registered: Nov 2006
Posts: 7

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Mysql two inastance on same server


Hello,
I am trying to create two instances of mysql on the same server. I am running fedora core 6 mysql 5.0.22. I have amended the my.cnf, but both instances are not running. It creates the mysql tables in the default /var/lib/mysql ignoring the my.cnf file. Can anyone tell what I should add to my.cnf to get 2 instances of mysql on the same server in /var/lib/mysql1 and /var/lib/mysql2

my.cnf :-

[mysqld_multi]
mysqld = /usr/bin/mysqld_safe
mysqladmin = /usr/bin/mysqladmin
user = mysql

[mysqld1]
socket = /var/lib/mysql1/mysql.sock1
port = 3307
pid-file = /var/lib/mysql1/mysql.pid1
datadir = /var/lib/mysql1/data
basedir = /var/lib/mysql1
user = mysql

[mysqld2]
socket = /var/lib/mysql2/mysql.sock2
port = 3308
pid-file = /var/lib/mysql2/mysql.pid2
datadir = /var/lib/mysql2/data
basedir = /var/lib/mysql2
user = mysql

ps info :-

root 7458 1 0 11:59 pts/3 00:00:00 /bin/sh /usr/bin/mysqld_safe --defaults-file=/etc/my.cnf --pid-file=/var/lib/mysql2/mysql.pid2 --log-error=/var/log/mysqld.log
mysql 7482 7458 1 11:59 pts/3 00:00:00 /usr/libexec/mysqld --defaults-file=/etc/my.cnf --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/lib/mysql2/mysql.pid2 --skip-locking

thanks
Barry
 
Old 01-27-2007, 12:04 AM   #2
gilead
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Registered: Dec 2005
Location: Brisbane, Australia
Distribution: Slackware64 14.0
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Would getting a second instance running give you anything that creating 2 databases in the one instance wouldn't? It's a simple process to create a second database...
 
Old 01-30-2007, 04:43 AM   #3
BarryLinux
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Registered: Nov 2006
Posts: 7

Original Poster
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Thanks for reply steve. We are trying to create a test and a live environment. The apache web server has two virtual host a dev and live url. The live url I want to point to the live instance. ie port 3307 datadir /var/lib/mysql1/data. The second instance is used by the test url ie port 3308 /var/lib/mysql2/data.

Has anyone setup anything like this before?
 
Old 05-01-2007, 05:30 AM   #4
BarryLinux
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Registered: Nov 2006
Posts: 7

Original Poster
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We got the 2 mysql instances working in the end. Instead of using two port numbers. We decided to use a virtual IP. If anyone else has the same problem, below is our new my.cnf which works fine.

[mysqld_multi]
mysqld = /usr/bin/mysqld_safe
mysqladmin = /usr/bin/mysqladmin
user = mysql

[mysqld1]
socket = /var/lib/mysql1/mysql.sock1
bind-address = 10.10.1.5
pid-file = /var/lib/mysql1/mysql.pid1
datadir = /var/lib/mysql1/data

[mysqld2]
socket = /var/lib/mysql2/mysql.sock2
bind-address = 10.10.2.5
pid-file = /var/lib/mysql2/mysql.pid2
datadir = /var/lib/mysql2/data
 
  


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