Open Stack

That’s is, OpenStack is not aware yet of the backend that servers the /var/lib/nova/instances directory ; not that I’m aware of :)
- Razique
On Oct 28, 2013, at 22:35, Ray Sun <xiaoquqi at gmail.com> wrote:

> Thanks for all your response.
> 
> So libvirt can support ISCSI LUN, but OpenStack didn't provide such options yet?
> 
> Best Regards
> -- Ray
> 
> 
> On Tue, Oct 29, 2013 at 1:11 AM, Razique Mahroua <razique.mahroua at gmail.com> wrote:
> The only thing is that you need to create the volumes on your ISCSI backend first, so libvirt can use them, otherwise as a shared storage, works fine. ISCSI always gave me nice speeds compared to NFS
> 
> On Oct 28, 2013, at 10:04, Chris Friesen <chris.friesen at windriver.com> wrote:
> 
> > That works for one client.  How do you synchronize access between multiple clients?
> >
> > Also, for iSCSI it looks like libvirt can't create/delete volumes, that needs to be done on the server.
> >
> > Chris
> >
> > On 10/28/2013 10:49 AM, Razique Mahroua wrote:
> >> Libvrit does support ISCSI LUN as backends, meaning you can mount the ISCSI block on every compute node and you should be fine
> >> - Razique
> >>
> >> On Oct 28, 2013, at 8:54, Chris Friesen <chris.friesen at windriver.com> wrote:
> >>
> >>> On 10/28/2013 09:35 AM, Ray Sun wrote:
> >>>> Daniel,
> >>>> Thanks for you response. But I am still confusing about use a iscsi
> >>>> device, if I want to use it as shared storage, first I need to attach to
> >>>> a node as a block storage, then I mount it to other compute nodes using
> >>>> NFS. The problem is that this will make a big lost on performance.
> >>>> Currently nova already support to create a new VM on ceph RBD, but why
> >>>> we can not create it on a block storage?
> >>>
> >>> ceph and NFS are both designed for simultaneous access by multiple clients.
> >>>
> >>> iSCSI is not.
> >>>
> >>> Chris
> >>>
> >>>
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> >>
> >
> 
> 
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