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On Thursday 16 October 2003 17:56, Matthias F. Brandstetter wrote:
> Hi all,
>
> I need a mailsystem for around 2.000 POP3 accounts (and SMTP for them of
> course) and and I want to implement that in a safe way. So I thougt I
> setup some kind of backup server with the same config and then make a new,
> but higher MX record for this domain to that backup mailserver, right?
>
> Question: Sure, I can make a 1:1 copy of the 1st server, but if that one
> goes down and the 2nd is handling all the mails, how can users reach their
> "old" mails from primary server? Is it possible somehow to implement a
> "fulltime" copy (so that both server have always the same content on
> them), or do I have to sync the mail data over night for example?
>
> Thx for all your answers and hints!
> Greetings, Matthias
We are planning something like that here at work now.
Basic premise is thus:
Primary:
Dual CPU, bucket loads of ram, big ass raid 5 array
Secondary/backup:
Single CPU, enough ram, big ass raid 5 array
Primary MX 10, secondary/backup MX 30
Now the kicker, D R B D ! Network raid 1, and heartbeat to watch over it.
It seems the guy planning it (windows code monkey) wants to use Exim, due to
native TLS, bleh. Oh, and debian, bleeeh.
Should things get bigger and bigger, it's painfully easy to add more upfront
mail servers and turn the old primary and secondary/backup into a failover
backend storage system, and do it all over NFS.
- --
Mike Williams
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