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Re: [Qemu-devel] libguestfs now uses virtio-scsi, supports large numbers

From: Richard W.M. Jones
Subject: Re: [Qemu-devel] libguestfs now uses virtio-scsi, supports large numbers of disks
Date: Fri, 15 Jun 2012 12:21:47 +0100
User-agent: Mutt/1.5.21 (2010-09-15)

On Fri, Jun 15, 2012 at 11:44:42AM +0100, Stefan Hajnoczi wrote:
> On Thu, Jun 14, 2012 at 2:49 PM, Richard W.M. Jones <address@hidden> wrote:
> > I switched libguestfs over to using virtio-scsi.  One immediate
> > benefit is support for large numbers of disks: up to 255 because we're
> > using 1 target / disk and we reserve one disk for the appliance, in
> > theory more could be supported if we used LUNs.
> Cool, thanks for sharing!  Does libguestfs hotplug LUNS/targets?

Not quite, but in the near future it will.  It's something I'm aiming
to have working for RHEL 7.

> Cong and Wan Seng are implementing guest driver and QEMU-side changes
> so the guest receives notifications of hotplugged LUNs.  It's nicer
> than manually rescanning the bus from inside the guest.


Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming blog: http://rwmj.wordpress.com
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