On 03/14/2012 04:19 PM, Miles Fidelman wrote:
> Hi Folks,
>
> I'm currently running a pretty basic high-availability configuration
> for our mail server (postfix) - it simply runs in a Xen virtual
> machine, with mirrored disks across two machines (DRBD), and failover
> of the VM if something goes wrong (pacemaker).
>
> I'm thinking about migrating the failover host to a 2nd datacenter -
> which makes disk mirroring and VM migration a bit trickier, and I
> really don't like how brittle all that infrastructure is, so I'm
> starting to think about application layer redundancy - two
> mailservers, at remote locations, multiple DNS records, and doing
> something to replicate ques, configurations, and local delivery. The
> goal is the same: keep processing mail if a machine goes down, and
> don't lose any data to machine or disk crashes.
>
> Which leads to a question: Are any of you running such a
> configuration? If so, can you describe what you're doing? And.. are
> there any good references, presentations, etc. that anybody knows
> about re. building high-availability, scalable, distributed mail
> processing infrastructure?
>
> Thank you very much,
>
> Miles Fidelman
>
SMTP is designed to be redundant from the ground up; that's why you have
multiple MX records.
Any reasonable arguments why just running multiple MTAs does not work
for you ?
--
J.
