On 04/05/2013 12:34 PM, Laurent Barbe wrote:
Hello,
I'm trying online resizing with RBD + XFS. But when i try to make a
xfs_growfs, it doesn't seen the new size. I don't use partition table,
os is debian squeeze / kernel 3.8.4 / ceph 0.56.4.
It seems that the mounted file system prevents update the block device
size ?
If the file system is not mounted, or if I unmount + mount, xfs_growfs
works as expected.
When I block device is in use it can't change. When you unmount the
blockdevice is no longer in use and the new size can be detected.
This is a not a RBD limitation, but it's something that goes for all
block devices in Linux.
I've seen some patches floating around that could do this online, but
I'm not sure if they are in the kernel.
You could try this:
$ blockdev --rereadpt /dev/rbd1
Or
$ partprobe -s /dev/rbd1
--
Wido den Hollander
42on B.V.
Phone: +31 (0)20 700 9902
Skype: contact42on
#### ORIGINAL SIZE ####
# parted /dev/rbd1 print
Model: Unknown (unknown)
Disk /dev/rbd1: *105MB*
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0,00B 105MB 105MB xfs
#### RBD RESIZE ####
# rbd resize rbdxfs --size=200
Resizing image: 100% complete...done.
#### SIZE NOT CHANGE IF FS ON RBD1 IS MOUNTED ####
# parted /dev/rbd1 print
Model: Unknown (unknown)
Disk /dev/rbd1: *105MB*
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0,00B 105MB 105MB xfs
#### UMOUNT FS --> SIZE OK ####
# umount /mnt/rbdxfs
# parted /dev/rbd1 print
Model: Unknown (unknown)
Disk /dev/rbd1: *210MB*
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0,00B 210MB 210MB xfs
Any Ideas ?
Thanks
--
Laurent Barbe
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