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[Fedora-xen] Re: IO performance sanity check
- From: Troels Arvin <troels arvin dk>
- To: fedora-xen redhat com
- Subject: [Fedora-xen] Re: IO performance sanity check
- Date: Fri, 24 Oct 2008 07:59:13 +0000 (UTC)
Ask Bjørn Hansen wrote:
> I've usually avoided putting anything that needed IO performance on Xen,
> but now I had a few applications that'd fit well in Xen but need a
> little bit of disk IO. I was surprised just how poorly it works.
My experiences with paravirt Xen have been:
- Fine performance, as long as "normal" file I/O
is being used.
- Bad performance for "low-level" operations like
file system creation
This was with "raw device" based virtual disks. I haven't benchmarked file-
backed virtual disks.
More on my experiences:
http://article.gmane.org/gmane.comp.emulators.xen.user/29483
--
Regards,
Troels Arvin <troels arvin dk>
http://troels.arvin.dk/
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