Re: Playing with replicated murder

From: Michael Loftis (no email)
Date: Thu Mar 03 2005 - 15:39:30 EST

  • Next message: Ken Murchison: "Re: Playing with replicated murder"

    --On Thursday, March 03, 2005 16:59 +0100 Christoph Moench-Tegeder
    <> wrote:

    > Hi,
    > 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.

    Cyrus Home Page:
    Cyrus Wiki/FAQ:
    List Archives/Info:

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