[Lustre-discuss] Can't Create New Files

[Andreas Dilger]

On Sep 10, 2009  11:00 -0400, Adam wrote:
> -5, sorry I took a far better look then simply checking the health
> status. (Part of) the problem is that the MDS doesn't see the OSTs,
> eg:
> 
> [root at MDS ~]# lctl dl
>   0 UP mgc MGC10.29.48.1 at o2ib eeb1eccc-727e-f3f8-824a-9862a42e3b08 5
>   1 UP mdt MDS MDS_uuid 3
>   2 UP lov lfs-mdtlov lfs-mdtlov_UUID 4
>   3 UP mds lfs-MDT0000 lfs-MDT0000_UUID 671
> [root at MDS ~]# 

You need to look at the MDS startup logs and/or just shut down the
MDS and start it up again, to see why it isn't connecting to the
OSS nodes.  If it can't connect to any of them, I would suspect
a network problem.  Try "ping", "lctl ping", "telnet OSS5 988" to
see if you can check whether the connection is working.

> the OSS's seem okay:
>
> [root at OSS5 ~]# lctl dl
>   0 UP mgc MGC10.29.48.1 at o2ib af5bdde6-7fe2-a944-05cd-28459ef91385 5
>   1 UP ost OSS OSS_uuid 3
>   2 UP obdfilter lfs-OST0002 lfs-OST0002_UUID 671
>   3 UP obdfilter lfs-OST000a lfs-OST000a_UUID 671
>   4 UP obdfilter lfs-OST0012 lfs-OST0012_UUID 671
>   5 UP obdfilter lfs-OST001a lfs-OST001a_UUID 671
> [root at OSS5 ~]# 
> 
> writeconf?

Well, that is a last resort, it probably isn't needed.

> On Thu, 2009-09-10 at 10:45 -0400, Oleg Drokin wrote:
> > Hello!
> > 
> > On Sep 10, 2009, at 10:33 AM, Adam wrote:
> > > I'm running into a rather strange problem where new files cannot be
> > > created (lustre 1.6.6), but existing files can be modified and even
> > > deleted.
> > > The MDS reports:
> > > LustreError: X:0:(mds_open.c:431:mds_create_objects()) error creating
> > > objects for inode Y:
> > > For a large subset of inodes.
> > 
> > What is the rc value reported in that message?
> > Are there any messages on OSTs at the same time?
> > 
> > Bye,
> >      Oleg
> 
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Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.