====== Two Mysql Instances ======

  - install mysql
  - copy the mysql data directory to say mysql1
  
So you have /var/db/mysql and /var/db/mysql1

  - Open the first mysql /var/db/mysql/my.cnf
    
    Change
    <code text>
    port = <The port you want the first mysql to listen to>
    bind-address = <The ip you want the first mysql to bind to>
    </code>

  - start the first mysql server

  - Open the second mysql /var/db/mysql1/my.cnf

    Change
<code text>
port = <The port you want the second mysql to listen to>
bind-address = <The ip you want the second mysql to bind to>
</code>

  - Write the startup command for the second mysql server
<code bash>
/usr/local/bin/mysqld_safe --bind-address=<The ip address you want to bind
the second mysql server to> --user=mysql --socket=/tmp/mysql1.sock
--datadir=/var/db/mysql1 --pid-file=/var/run/mysql1.pid &
</code>

This works great for n number of mysql servers. Tested and working on one of
my live servers. 


[[http://dev.mysql.com/doc/refman/5.1/en/multiple-servers.html | further reference]]