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Re: Xen Dom0 vs. DomU disk I/O

On Thu, Nov 22, 2012 at 12:44:07PM +0100, Niels Dettenbach wrote:
> Ok,
> this is (was i wrote) a file based emulated disk which is slow by principle. 
> This is usually not useful in productive / high load environments. To get 
> "full" storage troughput you should use something like:
>  - plain / dedicated disks (hardware)
>  - plain / real partitions
>  - LVM volumes from Dom0
>  or any "real" storage type.
> instead of file based / emulated disks.

No, with a NetBSD dom0 at last, using file-backed storage isn't much slower
than physical paritions. This may be different with a linux dom0, where
I/O do an extra trip to userland in dom0.

Manuel Bouyer <>
     NetBSD: 26 ans d'experience feront toujours la difference

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