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Re: [Xen-users] cache for partition based VBD?

To: "Tim Freeman" <tfreeman@xxxxxxxxxxx>
Subject: Re: [Xen-users] cache for partition based VBD?
From: "John Madden" <jmadden@xxxxxxxxxxx>
Date: Tue, 29 Nov 2005 13:43:33 -0500 (EST)
Cc: Tim Freeman <tfreeman@xxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
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> For partition backed VBDs, is there still an effective cache in dom0?  The 
> Linux
> buffer cache will affect file based VBDs, but does the partition backed VBD 
> get
> around it?

Filesystem caching shouldn't happen in dom0 for the domU's and I doubt you'd 
it to.  Caching *will* happen at the domU level and that's where you want it --
close to your applications.

Besides, if you can run a dom0 in like 128MB of memory to devote as much as
possible to your domU's, how much caching could you do?


John Madden
UNIX Systems Engineer
Ivy Tech Community College of Indiana

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