Re: xfs on ceph RBD resizing

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On Sat, 20 Jul 2013, Wido den Hollander wrote:
> On 07/20/2013 06:56 AM, Jeffrey 'jf' Lim wrote:
> > On Fri, Jul 19, 2013 at 12:54 PM, Jeffrey 'jf' Lim <jfs.world@xxxxxxxxx>
> > wrote:
> > > hey folks, I was hoping to be able to use xfs on top of RBD for a
> > > deployment of mine. And was hoping for the resize of the RBD
> > > (expansion, actually, would be my use case) in the future to be as
> > > simple as a "resize on the fly", followed by an 'xfs_growfs'.'
> > > 
> > > I just found a recent post, though
> > > (http://lists.ceph.com/pipermail/ceph-users-ceph.com/2013-June/002425.html),
> > > that seems to indicate that what I have in mind may not be possible?
> > > is this true? Do I have to unmount the system (or worse, do a reboot?)
> > > before I can do an effective resize?
> > > 
> > 
> > another question that just came to mind: would you recommend skipping
> > partitioning, and then making an xfs out of the entire drive? I'm just
> > thinking how you would have to deal with partitioning upon an RBD
> > resize.
> > 
> 
> Yes, skip the partitioning, otherwise you will have to expand the partition
> first prior to expanding the filesystem.
> 
> I also just did a quick test with the 3.8 kernel and XFS directly on top of
> the RBD device, but the new size won't get detected while XFS is mounted.

Hrm.  Do you know if this works with LVM?

sage
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