[Linux-cluster] A few GFS newbie questions: journals, etc
Lon Hohberger
lhh at redhat.com
Fri Jun 24 21:37:39 UTC 2005
On Fri, 2005-06-24 at 15:12 -0500, Nate Carlson wrote:
> On Wed, 8 Jun 2005, Lon Hohberger wrote:
> > (a) a totally asymmetric setup: one node having 21 votes, all others
> > having 1. If the node with 21 votes goes down, everyone loses quorum
> > though, and no one can access the file system.
>
> Y'know, coming back to this.. instead of using gulm, would it be possible
> for me to set up a cluster where the physical nodes (4) have like 50 votes
> each, and the VM's have 1 vote each? That way, I could lose one of the
> physical nodes, and still have a quorum, right?
Yes, as long as more than half the VMs were on the surviving node as
well...
If exactly half of the nodes votes disappear, a quorum no longer exists
(except in the 2-node special case). Suppose there were 4 VMs:
2 x 50 votes = 100 votes
4 x 1 vote = 4 votes
Total = 104 votes
---------------------------
Need for quorum = 53 votes
-- Lon
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