[Linux-HA] cluster freezing

Joseph Smith smithj at iivip.com
Mon Oct 24 01:09:55 MDT 2005


Quorum means the majority. Falling below 3 nodes in a 4 node configuration 
would leave less than the majority of the nodes up. For an active/active, 
according to what i've read it seems you have to have quorum.

Joe


On Monday 24 October 2005 14:00, Scott Farwell wrote:
> What is "quorum" and why dos it fail below 3 active nodes ?  Can this
> behavior be changed ?
>
> Is there somewhere I can read up on the idea of "quorum" to see why it's
> implemented this way ?
>
> ----- Original Message -----
> From: "Alan Robertson" <alanr at unix.sh>
> To: "General Linux-HA mailing list" <linux-ha at lists.linux-ha.org>
> Cc: <scott at iivip.com>
> Sent: Monday, October 24, 2005 1:28 PM
> Subject: Re: [Linux-HA] cluster freezing
>
> > Joseph Smith wrote:
> >> Hello List!
> >>
> >> I am having an issue with heartbeat 2.02.
> >>
> >> I have a 4 node active/active cluster. When I reboot 2 of the nodes the
> >> cluster freezes (ie, I cannot connect to any machine on the cluster). If
> >> I reboot or remove network connectivity to one machine it fails over as
> >> it should. The logs look like you would expect- they report the machines
> >> as dead. I want to rule out a configuration mistake.
> >> Here is the cib.xml file included on all 4 machines before all the
> >> automatically added stuff is added:
> >
> > When you drop below 3 nodes active in the cluster, you lose quorum.  By
> > default, this causes resources to not be run.
> >
> > --
> >     Alan Robertson <alanr at unix.sh>
> >
> > "Openness is the foundation and preservative of friendship...  Let me
> > claim from you at all times your undisguised opinions." - William
> > Wilberforce

-- 
--
Joseph Smith
Interact Incorporated
smithj at iivip.com
(402)476-8786 x391




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