Am 13.01.2011 08:22, schrieb Jonathan Tripathy:
Hi Everyone,
I wish to create a Postfix/Dovecot active-active cluster (each node will run Postfix *and* Dovecot), which will obviously have to use central storage. I'm looking for ideas to see what's the best out there. All of this will be running on multiple Xen hosts, however I don't think that matters as long as I make sure that the cluster nodes are on different physical boxes.
Here are my ideas so far for the central storage:
NFS Server using DRBD+LinuxHA. Export the same NFS share to each mail server. Which this seems easy, how well does Dovecot work with NFS? I've read the wiki page, and it doesn't sound promising. But it may be outdated..
Export block storage using iSCSI from targets which have GFS2 on DRBD+LinuxHA. This is tricky to get working well, and it's only a theory.
GlusterFS. Easy to set up, but apparently very slow to run.
So what's everybody using? I know that Postfix runs well on NFS (according to their docs). I intend to use Maildir
Thanks
i have drbd and ocfs with keepalive on ubuntu lucid, 2 loadbalancers, 2 mailservers with postfix and dovecot2 maildirs,clamav-milter,spamass-milter,sqlgrey, master-master mysql additional horde webmail on apache at both servers no problem so far, but for now i have only ca 100 mailboxes yet
i wouldnt recommend nfs for mailstore if you want use gfs you might use better some redhat (clone) last time i tested it on ubuntu , i couldnt get it running as i expected it ( this may changed now...)
i dont think there is some best solution depends on you hardware, finance resources, number of wanted mailboxes etc
-- Best Regards
MfG Robert Schetterer
Germany/Munich/Bavaria