[ovirt-users] iSCSI and multipath

[Gary Lloyd]

Is there any chance of multipath working with direct LUN instead of just
storage domains ? I've asked/checked a couple of times, but not had much
luck.

Thanks

*Gary Lloyd*
----------------------------------
IT Services
Keele University
-----------------------------------


On 9 June 2014 15:17, John Taylor <jtt77777 at gmail.com> wrote:

> On Mon, Jun 9, 2014 at 9:23 AM, Nicolas Ecarnot <nicolas at ecarnot.net>
> wrote:
> > Le 09-06-2014 14:44, Maor Lipchuk a écrit :
> >
> >> basically, you should upgrade your DC to 3.4, and then upgrade the
> >> clusters you desire also to 3.4.
> >
> >
> > Well, that seems to have worked, except I had to raise the cluster level
> > first, then the DC level.
> >
> > Now, I can see the iSCSI multipath tab has appeared.
> > But I confirm what I wrote below :
> >
> >>>>> I saw that multipathing is talked here :
> >>>>> http://www.ovirt.org/Feature/iSCSI-Multipath
> >>>>>
> >>>>>>     Add an iSCSI Storage to the Data Center
> >>>>>>     Make sure the Data Center contains networks.
> >>>>>>     Go to the Data Center main tab and choose the specific Data
> Center
> >>>>>>     At the sub tab choose "iSCSI Bond"
> >>>>>>     Press the "new" button to add a new iSCSI Bond
> >>>>>>     Configure the networks you want to add to the new iSCSI Bond.
> >>>>>
> >>>>>
> >>>>> Anyway, I'm not sure to understand the point of this wiki page and
> this
> >>>>> implementation : it looks like a much higher level of multipathing
> over
> >>>>> virtual networks, and not at all what I'm talking about above...?
> >
> >
> > I am actually trying to know whether bonding interfaces (at low level)
> for
> > the iSCSI network is a bad thing, as was told by my storage provider?
> >
> > --
> > Nicolas Ecarnot
>
>
> Hi Nicolas,
> I think the naming of the managed iscsi multipathing feature a "bond"
> might be a bit confusing. It's not an ethernet/nic bond, but a way to
> group networks and targets together, so it's not "bonding interfaces"
> Behind the scenes what it does is creates iscsi
> ifaces(/var/lib/iscsi/ifaces) and changes the way the iscsiadm calls
> are constructed to use those ifaces (instead of the default) to
> connect and login to the targets
> Hope that helps.
>
> -John
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