mirror of
https://github.com/ceph/ceph
synced 2024-12-20 18:33:44 +00:00
42 lines
1.3 KiB
Perl
42 lines
1.3 KiB
Perl
|
|
||
|
|
$ get_field() {
|
||
|
|
> rbd info --format=json $1 | python -c "import sys, json; print json.load(sys.stdin)['$2']"
|
||
|
|
> }
|
||
|
|
|
||
|
|
Write to first and last sectors and make sure we hit the right objects:
|
||
|
|
|
||
|
|
$ ceph osd pool create hugeimg 12 >/dev/null 2>&1
|
||
|
|
$ rbd pool init hugeimg
|
||
|
|
$ rbd create --size 4E --object-size 4K --image-feature layering hugeimg/img
|
||
|
|
$ DEV=$(sudo rbd map hugeimg/img)
|
||
|
|
$ xfs_io -c 'pwrite 0 512' $DEV >/dev/null # first sector
|
||
|
|
$ xfs_io -c 'pwrite 4611686018427387392 512' $DEV >/dev/null # last sector
|
||
|
|
$ sudo rbd unmap $DEV
|
||
|
|
|
||
|
|
$ get_field hugeimg/img size
|
||
|
|
4611686018427387904
|
||
|
|
$ get_field hugeimg/img objects
|
||
|
|
1125899906842624
|
||
|
|
$ rados -p hugeimg ls | grep $(get_field hugeimg/img block_name_prefix) | sort
|
||
|
|
.*\.0000000000000000 (re)
|
||
|
|
.*\.0003ffffffffffff (re)
|
||
|
|
|
||
|
|
Dump first and last megabytes:
|
||
|
|
|
||
|
|
$ DEV=$(sudo rbd map hugeimg/img)
|
||
|
|
$ hexdump -n 1048576 $DEV
|
||
|
|
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
|
||
|
|
*
|
||
|
|
0000200 0000 0000 0000 0000 0000 0000 0000 0000
|
||
|
|
*
|
||
|
|
0100000
|
||
|
|
$ hexdump -s 4611686018426339328 $DEV
|
||
|
|
3ffffffffff00000 0000 0000 0000 0000 0000 0000 0000 0000
|
||
|
|
*
|
||
|
|
3ffffffffffffe00 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
|
||
|
|
*
|
||
|
|
4000000000000000
|
||
|
|
$ sudo rbd unmap $DEV
|
||
|
|
|
||
|
|
$ ceph osd pool delete hugeimg hugeimg --yes-i-really-really-mean-it >/dev/null 2>&1
|