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Mirrored Servers

Posted on 2003-02-26
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We are about to set up a mirrored server at another location.

We are planning this next step to a) share the load on our servers and b) increase our redundancy.

At the moment we run Slackware 8.1, Apache 1.3, eXtremail (mail server), mySQL, php, cold fusion, perl.....

Can anyone give me any advice that will make this next step (a bit less painful).

do both systems need to be identical?
or just the file content?
are there any tricks to the dns?


Steve
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Question by:iredlands
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heskyttberg earned 800 total points
ID: 8029806
Hi!

With DNS you can set up two IP for the www.mydomain.com address. That way you get 50% web traffic to each server.

There might be som issues, unless you plan to set an hardware load balancer in front of the servers.

If you do DNS round robbin and have an PHP, cold fusin or perl app that uses sessions there might be some unwanted side effects.

Both systems don't have to be identical, you just need same file conetent when it comes to webpages, sql DB, you should consider setting up som sort of replication scheme.

It would be easier to maintain if you have two identical systems.

Condier trying some of the HA-Linux packages in order to get that setup to function well.

Regards
/Hans - Erik Skyttberg
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