$ rbd diff rbd/myimage-1 | awk '{ SUM += $2 } END { print SUM/1024/1024 " MB" }'
--
Regards,
Sébastien Han.
> On 04 Nov 2014, at 16:57, Daniel Schwager <Daniel.Schwager@xxxxxxxx> wrote:
>
> 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
>
> ---
>
> (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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