Hi,
Try using LVM and see if it goes any faster. Loop back isnt optimal for
this type of things.
Marcus
Adrian Chadd wrote:> Hi,
>
> I''m testing out the Xen-3.0.2 (source from ~week ago) to see how
> well it copes under load.
>
> My current setup:
>
> * server: 2ghz Athlon, 2gb RAM, 2x200gig ATA100 disks, software
> mirrored
> * 14 domU - each with 1gb RAM, 1gb swap, 128mb RAM
> * domUs: ext3 root filesystems on an ext3 dom0 data partition
>
> * Run 13 domU''s in looped kernel builds. The CPU is maxed but the
> disk IO stays low (under a megabyte a second.)
>
> * Run a ''find /'' in one domU - the total disk throughput
(vmstat 1
> on dom0) is slow (under a couple of megabytes a second) with
> the find running just as slowly.
>
> * Just in case ''vmstat 1'' in dom0 is lying somehow: no,
the hard
> disk activity light isn''t busy. :)
>
> The other Xens aren''t pushing the disk IO at all; so I''m
wondering
> why the ''find /'' isn''t able to transfer data any
faster.
>
> Does anyone have any hints where I''d start looking?
>
>
>
> Adrian
>
>
>
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