[Lustre-discuss] "up" a router that is marked "down"

[Jeremy Filizetti]

Though I think its marked as development or experimental in the Lustre
documention or source "lctl set_route" has worked fine for me in the past
with no issues.

lctl set_route <nid> up

is the syntax I believe.

Jeremy

On Tue, Jan 25, 2011 at 9:52 AM, Michael Kluge
<Michael.Kluge at tu-dresden.de>wrote:

> Jason, Michael,
>
> thanks y lot for your replies. I pinged everone from all directions but
> the router is still marked "down" on the client. I even removed and
> re-added the router entry via lctl --net tcp1 del_route xyz at o2ib and
> lctl --net tcp1 add_route xyz at o2ib . No luck. So I think I'll wait for
> the next maintenance window. Oh, and I forgot to mention that the
> servers run a 1.6.7.2, the router as well and the clients 1.8.5. Works
> good so far.
>
>
> Thanks, Michael
>
>
> Am Dienstag, den 25.01.2011, 15:12 +0100 schrieb Temple Jason:
>  > I've found that even with the Protocal Error, it still works.
> >
> > -Jason
> >
> > -----Original Message-----
> > From: lustre-discuss-bounces at lists.lustre.org [mailto:
> lustre-discuss-bounces at lists.lustre.org] On Behalf Of Michael Shuey
> > Sent: martedì, 25. gennaio 2011 14:45
> > To: Michael Kluge
> > Cc: Lustre Diskussionsliste
> > Subject: Re: [Lustre-discuss] "up" a router that is marked "down"
> >
> > You'll want to add the "dead_router_check_interval" lnet module
> > parameter as soon as you are able.  As near as I can tell, without
> > that there's no automatic check to make sure the router is alive.
> >
> > I've had some success in getting machines to recognize that a router
> > is alive again by doing an lctl ping of their side of a router (e.g.,
> > on a tcp0 client, `lctl ping <routerIP>@tcp0`, then `lctl ping
> > <routerIP>@o2ib0` from an o2ib0 client).  If you have a server/client
> > version mismatch, where lctl ping returns a protocol error, you may be
> > out of luck.
> >
> > --
> > Mike Shuey
> >
> >
> >
> > On Tue, Jan 25, 2011 at 8:38 AM, Michael Kluge
> > <Michael.Kluge at tu-dresden.de> wrote:
> > > Hi list,
> > >
> > > if a Lustre router is down, comes back to life and the servers do not
> > > actively test the routers periodically: is it possible to mark a Lustre
> > > router as "up"? Or to tell the servers to ping the router?
> > >
> > > Or can I enable the "router pinger" in a live system without unloading
> > > and loading the Lustre kernel modules?
> > >
> > >
> > > Regards, Michael
> > >
> > > --
> > >
> > > Michael Kluge, M.Sc.
> > >
> > > Technische Universität Dresden
> > > Center for Information Services and
> > > High Performance Computing (ZIH)
> > > D-01062 Dresden
> > > Germany
> > >
> > > Contact:
> > > Willersbau, Room A 208
> > > Phone:  (+49) 351 463-34217
> > > Fax:    (+49) 351 463-37773
> > > e-mail: michael.kluge at tu-dresden.de
> > > WWW:    http://www.tu-dresden.de/zih
> > >
> > > _______________________________________________
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> > >
> > >
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> >
>
> --
>
> Michael Kluge, M.Sc.
>
> Technische Universität Dresden
> Center for Information Services and
> High Performance Computing (ZIH)
> D-01062 Dresden
> Germany
>
> Contact:
> Willersbau, Room A 208
> Phone:  (+49) 351 463-34217
> Fax:    (+49) 351 463-37773
> e-mail: michael.kluge at tu-dresden.de
> WWW:    http://www.tu-dresden.de/zih
>
> _______________________________________________
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-discuss
>
>
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