Hi, This works: lvcreate --name tmp --size 10G all Logical volume "tmp" created mkfs.ext4 /dev/all/tmp mount /dev/all/tmp /mnt blockdev --getsize64 /dev/all/tmp 10737418240 lvextend -L+1G /dev/all/tmp Extending logical volume tmp to 11,00 GiB Logical volume tmp successfully resized blockdev --getsize64 /dev/all/tmp 11811160064 resize2fs /dev/all/tmp resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/all/tmp is mounted on /mnt; on-line resizing required old desc_blocks = 1, new_desc_blocks = 1 Performing an on-line resize of /dev/all/tmp to 2883584 (4k) blocks. The filesystem on /dev/all/tmp is now 2883584 blocks long. This does not work: rbd create --size 10240 tmp rbd info tmp rbd image 'tmp': size 10240 MB in 2560 objects order 22 (4096 KB objects) block_name_prefix: rb.0.12dd.238e1f29 format: 1 rbd map tmp mkfs.ext4 /dev/rbd1 mount /dev/rbd1 /mnt blockdev --getsize64 /dev/rbd1 10737418240 rbd resize --size 20000 tmp blockdev --getsize64 /dev/rbd1 10737418240 resize2fs /dev/rbd1 resize2fs 1.42 (29-Nov-2011) The filesystem is already 2621440 blocks long. Nothing to do! It does work after umounting: umount /mnt blockdev --getsize64 /dev/rbd1 fsck -f /dev/rbd1 resize2fs /dev/rbd1 resize2fs 1.42 (29-Nov-2011) Resizing the filesystem on /dev/rbd1 to 5120000 (4k) blocks. The filesystem on /dev/rbd1 is now 5120000 blocks long. I assume there should be "something" in KRBD to allow for the same behavior as with LVM but I don't know enough about the kernel to be more specific. Maybe something similar to ioctl BLKRRPART ? Cheers -- Loïc Dachary, Artisan Logiciel Libre All that is necessary for the triumph of evil is that good people do nothing.
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