[Lustre-discuss] Lustre as a reliable f/s for an archive datacentre

[Kevin Fox]

No, I'm afraid not.

What you can do is fibre attach (or some other shared protocol, say
iscsi) the storage to two different OSS's. When OSS1 fails, OSS2 can
share out the OST until OSS1 comes back.

If your storage is directly attached to only one OSS, there is currently
no way to have that OST's data available when the OSS goes off line.
(Well, other then trying the drbd trick I mentioned in my other message.
Thats untested, YMMV, IANAL, etc, etc :)

Kevin


On Wed, 2009-04-08 at 15:00 -0700, John Ouellette wrote:
> I'm afraid I'm still not up-to-speed with Lustre (still just reading
> docs).  Do you mean that you can configure Lustre to have N+1
> redundancy
> wrt file data?  i.e. If you have two independent OSSs, can you
> configure
> Lustre so you can take one down and still have access to the data
> (with
> no direct hardware connections from the second OSS to the OSTs of the
> box that's being taken down)?
> 
> Thx,
> John
> 
> Kevin Fox wrote:
> > Its been in Lustre for a while. We're using it in some of our Lustre
> 1.4
> > clusters.
> >
> > Kevin
> >
> > On Wed, 2009-04-08 at 14:00 -0700, Aaron Porter wrote:
> >> On Wed, Apr 8, 2009 at 1:54 PM, John Ouellette
> >> <john.ouellette at nrc-cnrc.gc.ca> wrote:
> >>> In your architecture, can you take OSS's offline without losing
> data
> >>> access?  My suspicion is that we'd only get this if the OSTs of
> that
> >>> host were also connected to another OSS.
> >> The Wiki seems to indicate that 1.8 will allow this, but then the
> same
> >> Wiki says 1.8 should have come out 6-8 months ago...
> >> _______________________________________________
> >> Lustre-discuss mailing list
> >> Lustre-discuss at lists.lustre.org
> >> http://lists.lustre.org/mailman/listinfo/lustre-discuss
> >>
> >>
> >
> 
> --
> Dr. John Ouellette
> Operations Manager
> Canadian Astronomy Data Centre
> Herzberg Institute of Astrophysics
> National Research Council Canada
> 5071 West Saanich Road, Victoria BC V9E 2E7 Canada
> Phone: 250-363-3037
> 
>