[Linux-cluster] Cluster with shared storage on low budget

[Jeff Sturm]

> -----Original Message-----
> From: linux-cluster-bounces at redhat.com
[mailto:linux-cluster-bounces at redhat.com]
> On Behalf Of Bob Peterson
> Sent: Tuesday, February 15, 2011 11:24 AM
> To: linux clustering
> Subject: Re: [Linux-cluster] Cluster with shared storage on low budget
> 
> ----- Original Message -----
> | We don't want to allocate too more storage in advance, simply
because
> | it's easier to grow than to shrink. Stop the host, grow the volume,
> | e2fsck/resize2fs, start up and go. Much nicer than increasing disk
> | capacity on physical hosts.
> 
> These might be good for ext3/4, but with gfs and gfs2 you can lvresize
and gfs2_grow
> while the lv is mounted.  In fact, we expect it.
> Just make sure the vg has the clustered bit set (vgchange -cy) first.

You know, that's a good point.  We don't use GFS2 for any non-clustered
fs, right now, but why not?  Are you saying I can do an online gfs2_grow
even with lock_nolock?

-Jeff