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[Xen-devel] RE: drdb support

To: "Stefano Stabellini" <stefano.stabellini@xxxxxxxxxxxxx>, "Kamala Narasimhan" <kamala.narasimhan@xxxxxxxxx>
Subject: [Xen-devel] RE: drdb support
From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date: Sat, 29 Jan 2011 12:12:50 +1100
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>, "Kamala Narasimhan \(3P\)" <kamala.narasimhan@xxxxxxxxxx>
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Thread-topic: drdb support
> On Thu, 27 Jan 2011, Kamala Narasimhan wrote:
> > > - phy:/path/to/device
> > > - file:/path/to/file
> > > - tap:/path/to/file
> >
> > Along with phy, file and tap for block device types there appear to
be a
> 'drdb' option too.  Do we actively support it?  If so do we treat it
same as
> 'phy' and use blkback for backend?
> Yes, I think so. Given his recent work on drdb support in qemu, maybe
> James can comment on this.

Aside from the qemu problems I posted a patch for, drbd works great
under Windows. I haven't tested live migration (don't have a pair of
servers with compatible CPU's) so I don't know if that works. I also
don't allow multiple-primary as single-primary is the only locking
mechanism I have at this time to make sure the same DomU isn't started
on two machines concurrently.


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