Change in vdsm[master]: image: use qemu-img convert to copy internal volumes

nsoffer at redhat.com nsoffer at redhat.com
Wed Jan 21 08:57:09 UTC 2015


Nir Soffer has posted comments on this change.

Change subject: image: use qemu-img convert to copy internal volumes
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Patch Set 5:

(1 comment)

http://gerrit.ovirt.org/#/c/33355/5//COMMIT_MSG
Commit Message:

Line 39: 
Line 40: - dd 2Gb data volume on file domain: 79.02s +-7.44s
Line 41: - qemu-img 2Gb data volume on file domain: 56.92s +-12.37s
Line 42: 
Line 43: All the volumes contained the same (u)random data.
> The random data is the worst case. In the other cases qemu-img will always 
Can you add the missing info added in your replies to the commit message?
Line 44: 
Line 45: [1] here dd pays the price of having to copy the entire chunk of
Line 46:     allocated space (3Gb vs 2Gb of real data). Anyway even when
Line 47:     normalized to the same amount of data it's still slower.


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Gerrit-MessageType: comment
Gerrit-Change-Id: I1c740d88d52ca678d6c02d0ea500d2459c26560c
Gerrit-PatchSet: 5
Gerrit-Project: vdsm
Gerrit-Branch: master
Gerrit-Owner: Federico Simoncelli <fsimonce at redhat.com>
Gerrit-Reviewer: Adam Litke <alitke at redhat.com>
Gerrit-Reviewer: Allon Mureinik <amureini at redhat.com>
Gerrit-Reviewer: Dan Kenigsberg <danken at redhat.com>
Gerrit-Reviewer: Federico Simoncelli <fsimonce at redhat.com>
Gerrit-Reviewer: Francesco Romani <fromani at redhat.com>
Gerrit-Reviewer: Nir Soffer <nsoffer at redhat.com>
Gerrit-Reviewer: automation at ovirt.org
Gerrit-Reviewer: oVirt Jenkins CI Server
Gerrit-HasComments: Yes


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