[Lustre-discuss] Registering OST with failover MGS.

[Daniel Kobras]

Hi!

On Wed, Feb 04, 2009 at 11:50:58AM -0500, Brian J. Murrell wrote:
> On Wed, 2009-02-04 at 17:21 +0100, Daniel Kobras wrote:
> > Lustre clients allow to mount from either the primary MGS or a failover
> > server using a colon-separated syntax like
> > 
> > 	primary.mgs.example.com:failover.mgs.example.com:/fsname
> > 
> > Is there a similar way to configure an MGS failover pair into an OST?
> > tunefs.lustre --mgsnode seems to accept only a single MGS.
> 
> $ man tunefs.lustre
> ...
> --mgsnode=nid,...
>        Set  the  NID(s) of the MGS node, required for all targets other
>        than the MGS.
> 
> Notice the plurality of "NID(s)"?  That means you can use the multiple
> NID syntax.

Sure, this tells me how to specify multiple NIDs of a single server, but
I'd like to configure the NIDs of two distinct servers in a failover
pair.

> You can also specify --mgsnode=nid multiple times.

I've tried that--as well as a comma- or colon-separated list of NIDs--,
but neither options appears to work: As soon as I try to mount the OST
partition with the MGS active on the secondary node, the mount fails,
and error messages indicate that only the primary MGS node is queried.
All systems are running Lustre version 1.6.6, by the way.

Regards,

Daniel.