Clustering and replication
janne.peltonen at helsinki.fi
Fri Jan 26 03:56:09 EST 2007
On Fri, Jan 26, 2007 at 12:07:49AM -0800, Tom Samplonius wrote:
> ----- Janne Peltonen <janne.peltonen at helsinki.fi> wrote:
> > Hi!
> > As a part of our clustering Cyrus system, we are considering using
> > replication to prevent a catastrophe in case the volume used by the
> > cluster gets corrupted. (We'll have n nodes each accessing the same GFS,
> > and yes, it can be done, see previous threads on the subject.)
> I really doubt this. Even if GFS works the way it says it does,
> Cyrus does not expect to see other instances modifying the same
> message, and does not lock against itself.
I'm not entering this discussion again. ;) There are long threads on
this subject, especially since last October. See the archives.
> The Cyrus master builds a replication log as changes are made by
> imapd, pop3d, and lmtpd. The log contents are pushed to the
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