Charles Marcus a écrit :
On 8/11/2008, Mathieu Kretchner (mathieu.kretchner@sophia.inria.fr) wrote:
So here is my next environment :
how many mailbox ? 5000
with adequate hardware/RAM, no problem
how many users ? 6000
again - with adequate hardware/RAM, no problem
Ok it seems to be great, but wath do you consider to be an adequate hardware/RAM for this kind of environment ?
Concurrent access/usage will dictate if you need more than one server.
what kind of access ? IMAP(s), POP3(s), webmail
no problem - webmail is separate of course, use whichever webmail app you like
yes, of course, this will be an other discussion :)
how many server ? 2 (how to configure this with dovecot ? hearthbeat ? is it better with 1 big hardware ? )
Timo is working on integrated replication right now, but it does currently have proxy capability that I understand works well and makes this fairly painless, although I haven't used it...
But I'm not sure if you are talking about 2 REDUNDANT servers (for fail-over in the event the primary fails), or 2 active/load-balanced servers... proxy would work for load-balancing, and you can configure anything to use heartbeat, no?
I've explicitly post a fuzzy question to have this kind of answer ! Thanks I've a better global view of dovecot now.
Database user ? LDAP
Here is an other problem : we don't have uid/gid stored in our LDAP database. Do we have to configure dovecot with a dovecot specific user/group ?
no problem
Mail DB ? Cyrus maildir
You'll have to convert to standard maildir:
Thanks for the url, I've already seen it before and the script cyrus2courrier seems good but we wonder why you didn't mention imapsync ? (maybe because for mass migration we must have a clear password file?)
Capability ? Sieve / Quota
On latest version (1.1.2 currently), no problem, but a newer/full rewrite to provide native sieve capability is in progress, which will provide much better control
High Performance without hacking conf files !
this is one of dovecots strongest points imo...
Indeed, we bench cyrus and dovecot from scratch and dovecot seems to be realy fast !