Comments on: Setting up mutiple MySQL Database servers on a single linux machine

By: den led chieu sang

den led chieu sang — Sun, 11 Dec 2011 08:16:42 +0000

den led chieu sang…

[...]Setting up mutiple MySQL Database servers on a single linux machine | Linux Admin Zone[...]…

By: imran

imran — Wed, 27 Oct 2010 13:21:33 +0000

hi pawan gupta how you resolved this issue sandbox server not started yet ? any body know kindly reply me at is@mobileweaver.dk i am waiting.

By: imran

imran — Wed, 27 Oct 2010 12:02:00 +0000

i am unable to fine where it is logging as i want to see why ./start is not working? where are log files?

By: jagbir

jagbir — Fri, 19 Mar 2010 17:41:55 +0000

@Sharninder
Good question Sharninder.. there are few cases where this type of setup can be helpful. like in my case, we have a slave server from very critical production db servers (2 master-master hosts). Slave is read-only you know because if we try to manipulate data in a slave, replication will break. Slave is needed to provide general purpose read-only access and to take data backup.

We have another heavy internal application which requires same data to generate reports and require read/write access which we can’t provide in slave and due to critical nature, dont want to bog down our production hosts for this. Solution? either purchase a new server or run two instances on same slave server. One instance will run as slave, provide backup also and another instance fetch data from slave (not replication) then provide read/write access to application generating reports. 2nd instance is experimental so it can break and repaired any time by fetching data from slave. such experiments can’t be done with slave or production servers.

Hope this will give you an idea about such setup.

By: Sharninder

Sharninder — Fri, 19 Mar 2010 17:07:30 +0000

So, I understand that you can do this. But, my question is why would you want to ? Can’t you just have multiple databased within the same mysql instance ? I understand if this is for purely academic purposes, but setting up replication/FT on this just doesn’t make sense.