[ovirt-users] gluster performance oVirt 3.4

Jason Brooks jbrooks at redhat.com
Tue May 13 01:28:47 UTC 2014

----- Original Message -----
> From: "Gianluca Cecchi" <gianluca.cecchi at gmail.com>
> To: "Paul Robert Marino" <prmarino1 at gmail.com>
> Cc: "users" <users at ovirt.org>
> Sent: Monday, May 12, 2014 5:33:41 PM
> Subject: Re: [ovirt-users] gluster performance oVirt 3.4
> On Mon, May 12, 2014 at 8:38 PM, Paul Robert Marino
> <prmarino1 at gmail.com>wrote:
> > On the Gluster site there is a QEMU repo I'll send you the link latter
> > today. But essentially CentOS doesn't include the Gluster client or
> > libraries so they can't compile against it.
> > I'm not sure why CentOS and Scientific Linux don't include it but I think
> > it might just be an over site since Gluster 3.4 is new set of packages
> > which were added in the latest release of RHEL 6.
> > In truth you can simply unpack the source RPM and rebuild it with Gluster
> > support its not difficult but I don't remember the flags you need to pass
> > the rpmbuild command off the top of my head. That said I'd probably use the
> > ones off the Gluster site any way.
> > If you are using Gluster 3.5 the ones included in RHEL are incompatible
> > because Gluster still has large API changes between minor releases and they
> > were compiled against 3.4.
> >
> > Also Gluster 3.5 is a brand new release so I wouldn't rule out the
> > possibility of a bug. So if the Gluster enabled QEMU rpms don't help you
> > may need to inquire on the Gluster mailing list.
> >
> >
> If I remember correctly, due to problems with snapshots (now solved I
> think) and with live migration (not yet solved) the developers hard coded
> the fact that the  xml domain definition is the suboptimal one.
> So, even if you change gluster repo, the qemu command line generated by
> oVirt will be the same, so without the use of libgfapi.

I recently tested with F20 hosts and virt pkgs from the fedora-virt-preview 
repo, and the libgfapi support remained disabled.

The changelog for libvirt 1.2.2 mentions a gluster/qemu/snapshot fix, I'd
hoped this would do the trick, but I couldn't figure out how to re-enable
libgfapi to test it...


> Gianluca
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