[Engine-devel] storage overallocation ratio

[Allon Mureinik]

Hi Michal,

apparentsize is the size that you perceive when working with the volume (i.e., ignoring sparseness etc.) while trusize is the size taken on the drive (i.e., taking sparseness etc. into account).

DiskImage.getActualSize() should report the truesize.
The end result is OK, since truesize overrides apparentsize in that command, but it's obviously wrong, and should be fixed [1].

[1] http://gerrit.ovirt.org/#/c/14176/

----- Original Message -----
> From: "Michal Skrivanek" <michal.skrivanek at redhat.com>
> To: engine-devel at ovirt.org
> Sent: Saturday, April 20, 2013 11:13:04 PM
> Subject: [Engine-devel] storage overallocation ratio
> 
> Hi,
> I was trying to find out how is this actually calculated. Doesn't look very
> straightforward…:)
> 
> I'm curious about the following - vdsm reports something like truesize and
> apparentsize which IIUC should be distinct  but then in engine, in
> backend/manager/modules/vdsbroker/src/main/java/org/ovirt/engine/core/vdsbroker/irsbroker/GetImageInfoVDSCommand.java
> it's written to the same engine property actual_size.
> That doesn't sound right.
> Can someone enlighten me please?
> 
> Thanks,
> michal
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