[Lustre-discuss] querying a MGS

[Mag Gam]

Thankyou Andreas.

This is perhaps the best and cleanest way to do this. But it seems I
would need root access, right?

On Mon, Sep 15, 2008 at 5:22 PM, Andreas Dilger <adilger at sun.com> wrote:
> On Sep 15, 2008  06:02 -0400, Mag Gam wrote:
>> Hmm, where can I start looking into that? I would like to do this. I
>> can contribute to the Wiki :-)
>
> The code used by the liblustre mount (lustre/lib/lustre/super.c) would be
> the place to start for a userspace solution.  That said, I don't know that
> this is trivial work.
>
> You would likely be much better off to do something like ssh over to
> the MGS node and look at the /proc/fs/lustre/mgs/MGS/live/ directory
> to list the currently available filesystems.
>
>> On Mon, Sep 15, 2008 at 2:27 AM, Andreas Dilger <adilger at sun.com> wrote:
>> > On Sep 14, 2008  11:39 -0400, Mag Gam wrote:
>> >> Is it possible to query a MGS by a client who does not have a lustre
>> >> filesystem mounted? I am trying to find out what filesystems are being
>> >> hosted on a particular MGS without trying to mount on a client. Is
>> >> that possible?
>> >
>> > Not currently.  It would be possible to write a small piece of code
>> > do that.  There isn't a requirement for a "mounted" filesystem, since
>> > Lustre itself uses the MGC->MGS connection to retrieve the configuraion
>> > data it needs to do the mount.
>
> Cheers, Andreas
> --
> Andreas Dilger
> Sr. Staff Engineer, Lustre Group
> Sun Microsystems of Canada, Inc.
>
>