Hi,
is there a way to query the used space of a RBD image created with format 2 (used for kvm)?
Also, if I create a linked clone base on this image, how do I get the additional, individual used space of this clone?
In zfs, I can query these kind of information by calling "zfs info .." (2).
"rbd info" (1) shows not that much information about the image.
best regards
Danny
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(1) Output of "zfs info" from a Solaris system
root@storage19:~# zfs get all pool5/w2k8.dsk
NAME PROPERTY VALUE SOURCE
pool5/w2k8.dsk available 75,3G -
pool5/w2k8.dsk checksum on default
pool5/w2k8.dsk compression off default
pool5/w2k8.dsk compressratio 1.00x -
pool5/w2k8.dsk copies 1 default
pool5/w2k8.dsk creation Di. Mai 10 14:44 2011 -
pool5/w2k8.dsk dedup off default
pool5/w2k8.dsk encryption off -
pool5/w2k8.dsk keychangedate - default
pool5/w2k8.dsk keysource none default
pool5/w2k8.dsk keystatus none -
pool5/w2k8.dsk logbias latency default
pool5/w2k8.dsk primarycache all default
pool5/w2k8.dsk readonly off default
pool5/w2k8.dsk referenced 17,4G -
pool5/w2k8.dsk refreservation none default
pool5/w2k8.dsk rekeydate - default
pool5/w2k8.dsk reservation none default
pool5/w2k8.dsk secondarycache all default
pool5/w2k8.dsk sync standard default
pool5/w2k8.dsk type volume -
pool5/w2k8.dsk used 18,5G -
pool5/w2k8.dsk usedbychildren 0 -
pool5/w2k8.dsk usedbydataset 17,4G -
pool5/w2k8.dsk usedbyrefreservation 0 -
pool5/w2k8.dsk usedbysnapshots 1,15G -
pool5/w2k8.dsk volblocksize 8K -
pool5/w2k8.dsk volsize 25G local
pool5/w2k8.dsk zoned off default
(2) Output of "rbd info"
[root@ceph-admin2 ~]# rbd info rbd/myimage-1
rbd image 'myimage-1':
size 50000 MB in 12500 objects
order 22 (4096 kB objects)
block_name_prefix: rbd_data.11e82ae8944a
format: 2
features: layering
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