[Linux-cluster] GFS 6.0 node without quorum tries to fence

AJ Lewis alewis at redhat.com
Tue Aug 3 18:03:07 UTC 2004


On Tue, Aug 03, 2004 at 12:58:12PM -0500, Michael Conrad Tadpol Tilstra wrote:
> On Tue, Aug 03, 2004 at 09:22:59AM -0700, Steve Landherr wrote:
> > In a netsplit, what does fencing achieve when done by a node that
> > doesn't have quorum?  It still won't have quorum.  It should probably
> > just clean up as best it can and leave the rest of the cluster alone.
> 
> Think of the world as the nodes see it, not as you see it.  You cannot
> tell if it is a netsplit or truely nodes dieing.  It looks the same.

Or in other words, if 2 of 3 nodes go AWOL, do you really want your cluster
to stop until someone comes in an manually starts things up again -
especially if in the meantime, the 2 bad nodes can write to the disks?  The
fact that a single node can kill of the other nodes is a good thing!

-- 
AJ Lewis                                   Voice:  612-638-0500
Red Hat Inc.                               E-Mail: alewis at redhat.com
720 Washington Ave. SE, Suite 200
Minneapolis, MN 55414

Current GPG fingerprint = D9F8 EDCE 4242 855F A03D  9B63 F50C 54A8 578C 8715
Grab the key at: http://people.redhat.com/alewis/gpg.html or one of the
many keyservers out there...
-----Begin Obligatory Humorous Quote----------------------------------------
Behind every good computer -- is a jumble of wires 'n stuff.
-----End Obligatory Humorous Quote------------------------------------------
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
URL: <http://listman.redhat.com/archives/linux-cluster/attachments/20040803/86ebba14/attachment.sig>


More information about the Linux-cluster mailing list