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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 
  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)?


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

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