[Linux-cluster] GFS locks wnen a node fails

[Balagopal Pillai]

On Fri, 20 Jul 2007, Maciej Bogucki wrote:
Hi,

      I saw this problem when i was looking at gfs as an option for an 
hpc cluster. Did you mount with oopses_ok? With that option, if one node 
has a problem, gfs mounts on other nodes too tend to hang needing a total 
cluster restart. Ideally, the nodes should panic when they have gfs 
problems and the other nodes would stay unaffected.

Regards
Balagopal


> Hal napisa?(a):
> > Hallo everybody,
> > I have a test cluster of 4 machines. node0 - gnbd server and gnbd fence server
> > and 3 nodes to mount gfs. The problem is that when I unplug one of the nodes,
> > gfs locks and no one can access it until the node is reconnected. 
> > 
> > How can this lock be avoided if one node fails? 
> > How can I tell that gnbd-fencing is working at all?
> > 
> > "gnbd_import -c node0" says nothing even if I do "fence_node node2" I assume 
> > fencing is not working am I right?
> 
> Hello,
> 
> It looks like You don't hava fencing properly configured.
> You have to check Your logs, to see what is going on.
> If Your fence agent failed, GFS filesystem will be freezed(no ro/rw
> operations permited) until You perform manual fencing.
> 
> Best Regards
> Maciej Bogucki
> 
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