Replication: does it work in both directions?
dpc22 at cam.ac.uk
Tue Nov 13 05:04:16 EST 2007
On Sun, 11 Nov 2007, Rich Wales wrote:
> So, I would have replication set up going both directions between my two
> servers, but the sets of users handled in each direction would be
> disjoint. Each user would be assigned to one IMAP server (the master
> for their mailbox collection), and the other server would be their
> replica and act as their backup.
We do this. It is quite useful to be able to bounce users back and forth
between the two machines in a pair so that servers can be maintained
(patches, O/S upgrades, whatever) without any user visible downtime.
1) It won't work with shared mailboxes.
2) I'm not running the same replication code as the rest of you (though
replication in 2.3 is based on an old version of my code). I seem to
remember Ken raising an objection when this last discussed a year or
two back now. The objection may just have just been (1).
3) Sanity checks are good:
NO IMAP_INVALID_USER Attempt to update master for dpc22
David Carter Email: David.Carter at ucs.cam.ac.uk
University Computing Service, Phone: (01223) 334502
New Museums Site, Pembroke Street, Fax: (01223) 334679
Cambridge UK. CB2 3QH.
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