Re: [Qemu-devel] Re: [RFC] Disk integrity in QEMU

[Kevin Wolf]

Ryan Harper schrieb:
> * Laurent Vivier <address@hidden> [2008-10-13 13:52]:
>> What file type do you use (qcow2, raw ?).
> 
> Raw.

I guess the image is preallocated? What about sparse files (or qcow2,
anything that grows), do have numbers on those? In the past, I
experienced O_DIRECT to be horribly slow on them.

Well, looking at your numbers, they _are_ quite bad, so maybe it
actually was sparse. Then the preallocated case would be interesting.

Kevin