Re: File system mirroring for SMTP/POP Servers

[kami petersen <kokamomi_(_at_)_gueststars_(_dot_)_net>]

> > but when it comes to the mail 
> > repository, as far as i know maildir storage is *not* the choice for 
> > replication.
>
>
> Why?
>
> Or are you implying that mbox storage is? 

no

> Or that neither is?

neither, it's not a problem with maildir, it's a general problem of 
maintaining files synchronized.

> Basis for the theory?

ok, unison seems to be an option (as in: somebody on google seems to 
have gotten it to work reasonably). however i prefer to think of 
replicated instances as being constantly and correctly synchronized. the 
whole point of qmail and maildirs are that there is never any doubt 
about what messages exist or not. having something go off on cron even 
once every five minutes will negate this as well as piss off this 
particular sysop's overdemanding users. imagine, getting the same spam, 
twice! this guy uses pop, a imap/webmail service would be even worse off.

i regard reliability more important than availability as it comes to my 
mail, userland arrangements like these give me the creeps. i'm 
suggesting that he should try mitigating the reasons for his 
unavailability first. users should get used to 99.9% availability, and 
that's a reasonable figure for a non-replicated system. or look into 
some database system with built-in replication functionality.

anyway, have you any good examples to throw back at me?

/k