Aleksandar Milivojevic wrote:
Quoting Feizhou feizhou@graffiti.net:
a courier-imap/dovecot box would only just have to access a SAN and that is all there is to clustering. Multiple courier-imap/dovecot boxes hitting a database for user info and mailbox location and then hitting the san for the files. simple.
I think SAN is way out of reach of somebody who is left to build mail server for 2000 users with only 40GB drive.
Whoa, we were on the topic of clustering...this thread is not quite all about the guy with 2k users anymore...
Anyhow, what if your SAN storage or NFS server goes down? Your mailboxes go down with it. Hm, not much difference there. You are just replacing one component that might fail, with another component that might equally fail. This is a rahter complicated issue, and there is no single way to implement it.
SAN != NFS. SAN's provide multiple paths to the data where data is mirrored across different disks and accessible through more than on channel.
Courier works for some folks. Cyrus works for some folks. They are both good. You choose one and after some time learn to live with its limitations.
I am out to find out those limitations and their environments.