[Linux-cluster] Restarting GFS2 without reboot

[Steven Whitehouse]

Hi,

On Tue, 2013-11-26 at 14:29 +0200, Vladimir Melnik wrote:
> On Tue, Nov 26, 2013 at 12:15:31PM +0000, Steven Whitehouse wrote:
> > Well the logs appear to suggest that one of the nodes at least has been
> > fenced at some stage.
> 
> I have to admit that fencing hasn't been enabled in this cluster, 90% of
> jobs on these 2 nodes are working with other storage that is accessible
> by NFS. So it wouldn't be okay to reboot a node due to any problems with
> GFS2.
> 
In which case, get fencing configured first. Otherwise the first time
there is a problem, you risk data corruption. There is a very good
reason that fencing is required. It sounds like your overall config
needs a bit of a rethink,

Steve.

> > > It seems that it has happened due to some traffic congestion.
> > Do you have separate networks for cluster traffic and other traffic?
> > That will help to prevent this kind of thing. Also you can use tc to
> > ensure that the cluster traffic will always get through.
> 
> Oh, yes, I'm going to use a separate physical NICs for interaction with
> that storage, but it hasn't been implemented yet.
> 
> Thank you.
>