[CentOS] clustered mail server?
John R Pierce
pierce at hogranch.com
Sun May 18 06:08:10 UTC 2008
Christopher Chan wrote:
>
>> re: mail servers specifically, there are two seperate classes of
>> storage that would need replication... One is the mail spools and
>> queues as used by the MTA (postfix, sendmail, etc), and the other are
>> the user mail folder(s) as used by the local delivery agent (procmail
>> or whattever), and read by the mail client (pop, imap).
>
> No, mail spools/queues do not need replication. Stuff in the queue are
> usually deleted in a second and such dynamic change is not worth
> replicating. If you do put the queue on a distributed filesystem, in
> most cases you cannot have more than one instance running save for
> sendmail.
>
outbound mail can sit in queues retrying for hours negotiating their way
into the greylists of the likes of Yahoo. I guess if you don't mind
the possibility of messages getting lost around a server failure event,
then its no big deal, for sure.
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