Somewhat OT: Clustering and HA

[Vlad Mazek]

Keep in mind that if you have more than 4 MX records in round robin the
lookup will only return four, throwing the load balancing a bit out of
skew.  Linux HA with lvs is dead easy to configure and can do quite a bit
with cheap hardware.

-Vlad

On 2/26/08, Julian Field <MailScanner at ecs.soton.ac.uk> wrote:
>
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> You don't need NFS and locking to run a MailScanner cluster. You just
> have n independent MX servers all with the same MX priority (or 1 MX
> record pointing to multiple A records), and have them deliver onwards to
> the same mail servers for client email access.
> Don't start trying to share queues between multiple machines: it's
> asking for trouble, a nightmare to manage reliably and unnecessary.
> That's my opinion, anyway :-)
>
>
> Alex Neuman wrote:
> > Dear list,
> >
> > From time to time people have been discussing how to set up
> > MailScanner so that you can get a highly-available configuration. NFS
> > and locking have been discussed along with other details regarding how
> > "shared" the configuration is between clusters.
> >
> > I'd like to see if it would be possible to use a "pretty standard"
> > config of centos(or
> > rh)+ms+sendmail+dovecot+clamav+spamassassin+mailwatch(maybe)/etc. and
> > how I could either "install from scratch" as a cluster or possibly
> > "upconvert" one.
> >
> > Any docs you might suggest where one would look at different Linux
> > clustering scenarios, so I can pick it up from there? I could document
> > my progress on the list or the wiki.
>
>
> Jules
>
> - --
> Julian Field MEng CITP CEng
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-- 

-Vlad
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