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On Thu, 21 Jun 2007, Rio wrote:
> i assume here you mean because there would be 2 copies of
> each mailbox with no control over which copy a user reads.
yes
> the mail server software (surgemail) has built-in 2-way
> mirroring that updates each other within milliseconds of a
> change..
This has always been a bit of a problem. I didn't know about
surgemail. I see it's not GPL/FOSS. I can't imagine it would
be too hard to add this to GPL mailservers.
>> You'll need two if you want failover.
>
> failovers of directors, but if, say, one director handles
> 2 ips for 2 identical services on 2 servers, if one server
> goes down does that not do auto-failover for the real
> server portion?
there's too many "servers" in there. You can failover
one-by-one individual services running on the realservers
too if that's what you're asking. That is also handled by
external packages like mon, ldirectord and keepalived.
Joe
--
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
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