From: Mats Petersson <mats.petersson@citrix.com>
To: xen-devel@lists.xen.org
Subject: Re: !!!!!help!I wouldn't be able to meet the deadline!(qcow format image file read operation in qemu-img-xen)[updated]
Date: Wed, 19 Dec 2012 15:32:41 +0000 [thread overview]
Message-ID: <50D1DE19.1080709@citrix.com> (raw)
In-Reply-To: <2cff694b.c956.13bb3c38014.Coremail.hxkhust@126.com>
On 19/12/12 15:23, hxkhust wrote:
> Or could you tell me how to cache the data which is read from the
> backingfile when a qcow image is regarded as a virtual disk in a
> running HVM?
I take it the above single question is the effect of my previous reply?
Why did you have to "hide" that little extra question in the whole
previous e-mail?
Sorry, don't know the answer to your question [I'm guessing, in general,
that the Dom0 will do that for you, subject to available space], just
pointing out that there is a minor difference between your previous and
current mail.
By caching, do you mean "load the entire file into RAM", or "if a read
is requested for the same piece of 'disk' multiple times, I want the
previous result to be stored and returned".
--
Mats
next prev parent reply other threads:[~2012-12-19 15:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-19 15:23 !!!!!help!I wouldn't be able to meet the deadline!(qcow format image file read operation in qemu-img-xen)[updated] hxkhust
2012-12-19 15:32 ` Mats Petersson [this message]
-- strict thread matches above, loose matches on Subject: below --
2012-12-19 16:04 hxkhust
2012-12-19 16:23 ` Mats Petersson
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