fault tolerance/redundancy/load balancing

[Martin Hepworth]

Mack

Steve Freeguard and Steve Swaney (apologies if I get names wrong) and
done quite a bit of work to get a cluster of machines to use the
Mailwatch interface for stats/ releasing emails etc.

as to the basics, have both machine share the same MX value. dns will
automagically load balance across the two, if one machine goes down the
other will just the load.

There's fun things that need to go on with the mysql DB under these
failed circumstances and I think the Steves and figiured out some way of
handling this - check with the MailWatch mailing list.


--
Martin Hepworth
Snr Systems Administrator
Solid State Logic
Tel: +44 (0)1865 842300


Mack Ragan wrote:
> Hi, all:
>
> Hope this isn't off topic too much.  I am about to do an overhaul on our
> email system.  We currently have a Dell Poweredge 4600 running RH9 with
> Sendmail/MailScanner. We have an in-house web app that reads the mail logs
> to generate email stats, and allows access to the quarantine.  No user mail
> folders are located on this server...it merely acts as a gateway for
> filtering the mail, and delivers clean mail to it's ultimate destination.
>
> I have the opportunity to get another PowerEdge 4600 for use with the email
> system, and would like to redo everything with fault
> tolerance/redundancy/load balancing in mind between the two servers.  My
> plan is to install Gentoo/Sendmail/MailScanner on both boxes.  I have my own
> ideas about some possible scenarios to achieve fault
> tolerance/redundancy/load balancing, but I wanted to give the list an
> opportunity to make suggestions and to offer any similar solutions you
> currently have in place.
>
> My final hardware config will look like this for each of the 2 servers:
> Dell PowerEdge 4600
> Dual P4-2.4Ghz
> 3GB RAM
> 180GB drive space (after RAID5)
> 1GB NIC (copper)
>
> Thanks for the help!
>
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