Subject: RE: [Xen-users] Poor disk io performance in domUs

[Andrej Radonic <rado@xxxxxxxxxxxxx>]

Mats,

> > dd simultaneously in both dom0 = 170 MB/s
> I take it you mean "two parallel 'dd' commands at the same time"? That
> would still write to the same portion of disk (unless you specifically
> choose different partitions?)
it's different partitions - one dedicated partition for each domU. The 
partition are created as "virtual" block devices with the dell storage 
box manager.
> > dd simultaneously in two domU = 34 MB/s
> I take it this means two different DomU doing "dd"? 
> Is that 34 MB/s "total" (i.e. 17MB/s per domain) or per domain (68 MB/s
> total)? 
sorry, good you asked: it's the total, i.e. 17MB/s per domain! I guess 
you are getting the picture now as to my feelings... ;-)
Kind regards,
Andrej

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