Answer by gohdan for How can we create two instances of memcached server in same server in different port?

Simple solution to Centos 6

First copy /etc/sysconfig/memcached to /etc/sysconfig/memcached2 and write new settings to the new file.

Then copy /etc/init.d/memcached to /etc/init.d/memcached2 and change in the new file:

• PORT to your new port (it should be reset from /etc/sysconfig/memcached2, so we do it just in case)
• /etc/sysconfig/memcached to /etc/sysconfig/memcached2
• /var/run/memcached/memcached.pid to /var/run/memcached/memcached2.pid
• /var/lock/subsys/memcached to /var/lock/subsys/memcached2

Now you can use service memcached2 start, service memcached2 stop etc. Don't forget chkconfig memcached2 on to run it when machine boots up.