> -----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. _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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