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

From: Kevin Wolf
Subject: Re: [Qemu-devel] Re: [RFC] Disk integrity in QEMU
Date: Tue, 14 Oct 2008 12:05:06 +0200
User-agent: Thunderbird (X11/20071114)

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.


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