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Re: [Xen-users] remus vs. pacemaker/drbd?

Subject: Re: [Xen-users] remus vs. pacemaker/drbd?
From: Miles Fidelman <mfidelman@xxxxxxxxxxxxxxxx>
Date: Tue, 07 Sep 2010 12:46:58 -0400
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Greg Woods wrote:
On Tue, 2010-09-07 at 09:28 -0600, Nick Couchman wrote:
Pacemaker/DRBD, on the other hand, just synchronizes the data,
and if it detects that one of the domUs has died, starts it up somewhere else.
  So, with Remus, the theory/goal is 0 downtime of your domU, whereas Pacemaker
simply minimizes downtime to a certain point - the time it takes to detect 
failure
  and boot the new domU.
Actually, pacemaker can do live migrations with some limitations. If the

I have no experience with Remus, but from Nick's description of it, it
sounds like Remus might be a whole lot easier to set up and may be a
good way to go if all you care about is failover for your domU's, or if
you really need instantaneous failover in the event of a server crash.
All of this is well and good, but not to the point.

I'm using pacemaker and DRBD.  It works.  it's just a pain.

Has anybody on this list actually used Remus in production? Is it ready for prime time? Or is it still beta (or alpha)?

Miles

--
In theory, there is no difference between theory and practice.
In<fnord>  practice, there is.   .... Yogi Berra



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