OSEC

Neohapsis is currently accepting applications for employment. For more information, please visit our website www.neohapsis.com or email hr@neohapsis.com
 
Subject: Clustering for a POP server
From: Francisco Reyes (franreyes.somos.net)
Date: Wed Jul 05 2000 - 00:39:40 CDT

It must be my lucky week. I have been talking to my boss about
running our SMTP servers off Postfix. I have been reading and
printing notes/emails.

Today the POP3 server crashed. And from what I hear it has been
crashing constantly (I am new at the job.. 2 weeks). I may
mention to my boss that if he gives me a decent computer I may
volunteer to do his POP machine.

I am going to be trying a product called Understudy from a
compay called Polyserve.
With this I could setup the POP3 computer in a failover cluster.
My only concern is how could I copy all incoming mail to the
second computer so if the primary fails the secondary would
continue.?

This differs from a "DNS MX backup machine" (i.e. next in MX
priority) in that the users will be able to continue getting
their emails, including the ones that were on the failed POP3
computer. The users will also be able to right away have acces
to their email instead of having to wait for the primary
computer to be brought back up so the email is forwarded from
the secondary.

Is there a way to setup all emails to be delivered locally AND
forwarded to a separate computer?
Could this be done with an alias?

I am not sure yet how this clustering software works so I may
not have the "name" of the other computer, possibly only the
IP. Can I mail to an IP address?