[Fwd: Re: [Xen-users] Differences in performance between file and LVMbased images]

[Alex Iribarren <Alex.Iribarren@xxxxxxx>]

I always forget to reply to all, sorry :(

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To:	Roger Lucas <roger@xxxxxxxxxxxxx>
Subject:	Re: [Xen-users] Differences in performance between file and LVMbased images
From:	Alex Iribarren <Alex.Iribarren@xxxxxxx>
Date:	Thu, 24 Aug 2006 17:27:27 +0200
In-reply-to:	<20060824143152.7F92712EE1@xxxxxxxxxxxxxxxxxxxxxxx>
Openpgp:	url=http://www.cern.ch/Alex.Iribarren/AlexIribarren_0xCAE83E64.asc
References:	<20060824143152.7F92712EE1@xxxxxxxxxxxxxxxxxxxxxxx>
User-agent:	Thunderbird 1.5.0.5 (X11/20060719)

Hi Roger,

I totally agree with all your comments, I also thought several of the
results were very strange, which is why I redid the tests a couple of
times. Actually, the original test was simpler (and I didn't test as
many things). When I saw the results I was getting I changed a couple of
things, like the synchronous write and the random reads.

The reason why I didn't do a larger test was because I didn't have
enough space for a larger partition, but I'm going to make a few changes
and redo the test.

Anyway, I guess this serves as a reference point for what we can expect
when using relatively small files.

Roger Lucas wrote:
> As one final question, what is the scheduling configuration for Dom0 and
> DomU with these tests?  Have you tried different configurations
> (period/slice) for the DomU tests to see if it makes any difference?

I don't know anything about scheduling configurations, so I guess I used
whatever is the default.

Cheers,
Alex

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