Re: [Linux-cluster] RHEL4 U4's qdiskd without disk or partition

[Lon Hohberger <lhh redhat com>]

On Fri, Mar 30, 2007 at 04:12:09PM +1000, Isauro Michael Napolis wrote:
> hi all,
> 
> i have a question regarding using ping for tie
> breaker in a redundant NIC with a crossover for the qdisk daemon WITHOUT
> the use of a disk/ partition.  Has anybody made this work in RHEL4 U4?

It doesn't work right now, but there's no really good reason it *couldn't*
work.

The thing is that, of course, if you have a network partition caused by
a network anomaly - say an ARP storm (caused by maybe a switch loop, for
example) - where you can see the router, but not the other node, both
nodes will think they are quorate.

This isn't a problem - because one node will fence the other node first
;)  So, in the worst case, it becomes a race-to-fence.

Anyone else see any problems with doing this?

-- Lon

-- 
Lon Hohberger - Software Engineer - Red Hat, Inc.