Playing with replicated murder
mloftis at wgops.com
Thu Mar 3 15:39:30 EST 2005
--On Thursday, March 03, 2005 16:59 +0100 Christoph Moench-Tegeder
<cmt at burggraben.net> wrote:
> my employer wants to spend some money and buy a cluster filesystem
> for our IMAP servers (not that we currently need it, with only about
> five thousand active users on the largest server).
> The powers that be want to have "high availability" and "load balancing"
> (what load?). This sounds like a replicated murder to me.
> We already do have a SAN (fiberchannel and some spare gigabytes on an EMC)
> and a cluster filesystem (currently we are evaluating Polyserve, has
> anyone had some experience with psfs?).
> I am a little confused over the location of configdirectory, some of its
> contents (like the DB environment, the socket und the proc directorys)
> should be kept per node (I believe), while others (as quota files)
> should be shared between nodes. What about the replicated mailboxes.db?
> What am I missing?
Two Cyrus can not use the spool concurrently at present. MURDER provides
only for load distribution. Replication/failover has to be done seperately
'somehow' Basically the only thing you can do is active/passive setup, as
active/active for a given backend is NOT supported in current MURDER.
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