[pnfs] Summary of pNFS developers wrap-up meeting at Connectathon '08

[William A. (Andy) Adamson]

One more update - good summary...

On Thu, May 15, 2008 at 8:53 PM, Labiaga, Ricardo <
Ricardo.Labiaga at netapp.com> wrote:

> Thanks for the notes, a couple of comments inline.
>
> > -----Original Message-----
> > From: Dean Hildebrand [mailto:seattleplus at gmail.com]
> > Sent: Thursday, May 15, 2008 3:21 PM
> > To: pnfs mailing list; Robert Gordon; Mike Eisler; Noveck, Dave
> > Subject: [pnfs] Summary of pNFS developers wrap-up meeting at
> > Connectathon '08
> >
> > Here is a *best effort* summary of the pNFS developers
> > wrap-up meeting
> > at Connectathon '08 on Wednesday, May 14.  Please correct/update as
> > needed.  Thanks to everyone who came and helped find all those crazy
> > little bugs.
> >
> > pNFS
> > ****
> >
> > Sun File-based Layout
> > =====================
> > Client
> >     -    Successful interop. with spnfs and gpfs (and java server?),
> > each with 2 data servers.
> >     -    Performed layout_recall with gpfs by filehandle and
> > fsid.  No
> > synch. With layoutget.
> >     -    Found problem with Linux server where session not restarted
> > after reboot. (got error instead)
> >
> > Server - with 1 data server (try > 1?)
> >     -    Linux and Sun client successful interop.
> >
> > Linux Server
> > ============
> > IBM File-based Layout with GPFS w/ 2 data servers
> >     -    Successful interop with Linux and Sun pNFS clients
> > Netapp File-based Layout with SPNFS w/ 2 data servers (no stateid
> > transfer btw MDS<->DS)
> >     -    Successful interop with Linux and Sun pNFS clients
> > GFS2 File-based Layout w/ 2 data servers (no stateid transfer
> > btw MDS<->DS)
> >     -    Successful interop with Linux and Sun pNFS clients
> > Panasas Object-based server
> >     -    Successful interop with Linux client with Panasas
> > object based
> > layout driver
> >
> > Linux Client
> > ============
> >     -    Successful interop. with spnfs, gpfs, Sun server, and a java
> > server for files and the PanFS object based server for objects.


java server exposed several bugs in the filelayout driver device management
which we fixed.
the java server also does not support locking. basic/general/special tests
passed.

>
> >     -    Submount problem of transferring session from one
> > mount to the
> > next.
> >
> > DESY JAVA pNFS File-based Server
> > =====================
> >     -    Successful interop with Linux and Sun(?) pNFS clients
> >         o    No Callbacks

              o    No locking

>
> >
> > NFSv4.1 without pNFS (i.e., sessions)
> > *************************************
> >     -    AIX, Sun, and Linux clients successful interop with Linux
> > server exporting the PanFS file system.  Exporting Ext3 has 1 second
> > resolution issue.
> >         o    AIX client opened files with EXCLUSIVE4_1 which wasn't
> > initially supported in Linux server.  This was fixed and retested.
> >     -    Linux, Sun clients interop with AIX server? (I
> > assume this was
> > done)
>
> We found a couple of problems with the Linux client against the AIX v4.1
> server.  At one point the client sent a request with an incorrect
> sequence count on a given slot and the server correctly replied with
> NFS4ERR_SEQ_MISORDERED.  The Linux client was unable to recover from
> this error correctly.  We need to investigate this further.
>
> >     -    Linux <-> Sun sessions tested via pNFS testing
>
> In addition, successful NFSv4.0 and v3 testing using the NFSv4.1 kernel
> was done against the many of the vendors present.
>
> - ricardo
>
>
> >
> > Fall 2008 Bakeathon
> > *******************
> >     -    Will occur mid-Sept in Austin.
> >     -    Sun said they are interested in multi-segment layouts
> >     -    Linux said they are interested in device notifications.
> >     -    Hopefully we can start testing pNFS clients and servers that
> > support enough of the protocol to start being interesting to users.
> > (fault tolerance, performance, etc) :)
> >
> > Dean Hildebrand
> > Research Staff Member
> > IBM Almaden
> >
> > _______________________________________________
> > pNFS mailing list
> > pNFS at linux-nfs.org
> > http://linux-nfs.org/cgi-bin/mailman/listinfo/pnfs
> >
> _______________________________________________
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>
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