Hello Edward,
It works since kernel 3.10 (rbd client), before the client not update
the size while filesystem is mount :
http://comments.gmane.org/gmane.comp.file-systems.ceph.devel/14314
Regards,
Laurent Barbe
Le 24/06/2013 20:33, Edward Huyer a écrit :
-----Original Message-----
From: John Nielsen [mailto:lists@xxxxxxxxxxxx]
Sent: Monday, June 24, 2013 1:24 PM
To: Edward Huyer
Cc: ceph-users@xxxxxxxx
Subject: Re: Resizing filesystem on RBD without
unmount/mount cycle
On Jun 24, 2013, at 9:13 AM, Edward Huyer <erhvks@xxxxxxx> wrote:
I'm experimenting with ceph 0.61.4 and RBD under Ubuntu 13.0x. I create
a RADOS block device (test), map it, format it as ext4 or xfs, and mount it. No
problem. I grow the underlying RBD. lsblk on both /dev/rbd/rbd/test and
/dev/rbd1 shows the new size, but the filesystem resize commands don't
see the new size until I unmount and then mount the block device again. "-o
remount" isn't good enough, nor is partprobe.
Is there a way to club the filesystem tools into recognizing that the RBD has
changed sizes without unmounting the filesystem?
I know this is possible with e.g. virtual machines (c.f. "virsh blockresize"), so I
agree it _ought_ to work. I don't know if the RBD kernel module has or needs
any special support for online resizing.
It may work the same as "partprobe", but have you tried "blockdev --
rereadpt"?
No dice with blockdev.
I just now ran across this older thread in ceph-devel that seems to imply what I want isn't possible:
http://comments.gmane.org/gmane.comp.file-systems.ceph.devel/8013
It looks like the kernel can't update the size of a block device while the block device is in use. Boo.
Thanks anyway.
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