Quoting Ed W <[email protected]>:
On 17/02/2011 15:29, Donny Brooks wrote:
We are looking to migrate from our current mail server running
dovecot-1.2.11-3 to a new mail server running the latest dovecot
(2.0.9?). So this would not only be a version change but also a
machine change. We currently use Maildir for storing mail and would
like to stay that way.
Has anyone preformed such a feat and it worked? Looking for any input.
I've done it two ways - Rsync and ZFS snapshots. Both methods are
pretty much the same.
I have multiple satellites doing SMTP incoming/outgoing and dovecot on
a primary 'file server' with NFS exports.
1. replicate all data
2. replicate diff data (do this until the update window is small)
3. disable deliveries (for me, disable qmail-send, umount NFS mounts)
4. replicate diff data
5. turn off IMAP/POP
6. replicate diff data
7. Migrate IP address/Change FW rules/etc
8. Turn on IMAP/POP
9. Turn on deliveries
For my last ZFS migration I only had 2 minutes of 'downtime' from the
user's perspective (Step 5 -> Step 8), as the necessary changes were
already staged.
Rick
