Re: [ceph-users] Resizing filesystem on RBD without unmount/mount cycle
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:li...@jnielsen.net] Sent: Monday, June 24, 2013 1:24 PM To: Edward Huyer Cc: ceph-us...@ceph.com Subject: Re: [ceph-users] Resizing filesystem on RBD without unmount/mount cycle On Jun 24, 2013, at 9:13 AM, Edward Huyer erh...@rit.edu 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. ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] Resizing filesystem on RBD without unmount/mount cycle
On Jun 24, 2013, at 9:13 AM, Edward Huyer erh...@rit.edu 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? JN ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] Resizing filesystem on RBD without unmount/mount cycle
-Original Message- From: John Nielsen [mailto:li...@jnielsen.net] Sent: Monday, June 24, 2013 1:24 PM To: Edward Huyer Cc: ceph-us...@ceph.com Subject: Re: [ceph-users] Resizing filesystem on RBD without unmount/mount cycle On Jun 24, 2013, at 9:13 AM, Edward Huyer erh...@rit.edu 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. ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
