Re: Windows Server 2008 VM performance

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* Avi Kivity <avi@xxxxxxxxxx> [2009-06-02 16:49]:
> Javier Guerra wrote:
> >On Tue, Jun 2, 2009 at 4:38 PM, Avi Kivity <avi@xxxxxxxxxx> wrote:
> >  
> >>Andrew Theurer wrote:
> >>    
> >>>P.S. Here is the qemu cmd line for the windows VMs:
> >>>/usr/local/bin/qemu-system-x86_64 -name newcastle-xdbt01 -hda
> >>>/dev/disk/by-id/scsi-3600a0b80000f1eb10000074f4a02b08a
> >>>      
> >>Use: -drive /dev/very-long-name,cache=none instead of -hda to disable the
> >>host cache.  Won't make much of a differnence for 5 MB/s though.
> >>    
> >
> >would emulating SCSI instead of IDE help while we hope and wait for
> >virtio_block drivers? (and better virtio_net).
> >  
> 
> I don't think the scsi emulation currently supports command parallelism, 
> but I could be wrong.
> 
For reads only, and I don't think 2k8 installs to lsi scsi acutally
complete.

-- 
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
ryanh@xxxxxxxxxx
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