[cdwg] Notes from call on 1/30/13

[Christopher J. Morrone]

In attendance for the CDWG call today were:

  Nic Henke (Xyratex)
  Andreas Dilger (Intel)
  Peter Jones (Intel)
  Bryon Neitzel (Intel)
  Jodi Levi (Intel)
  James Simmons (ORNL)
  Chris Morrone (LLNL)

Community Survey
----------------

Chris suggested providing more granularity for distributions (instead of 
"RHEL 6.X", do "RHEL 6.1", 6.2, 6.3, etc.).  Might be nice to know, but 
would make a very crowded set of radio boxes.  Peter will consider it, 
but can stick to current question style if it would make the survey too 
cluttered.

No other comments.

Lustre 2.4 feature freeze update
--------------------------------

Peter reports that the following features are likely to land in time for 
2.4:

   NRS (Network Request Scheduler)
   4MB I/O support

These features are close, but there landing is not yet definite (and 
will require at least a few more days):

   HSM - full HSM will not be in 2.4, but 2.4 client support should land
   DNE phase 1
   LFSCK
   Tool for migration from 1.8

Nick requested updates on the CDWG list and/or other major list Lustre 
mailing list.

ORNL pre-2.4 test shot on Jaguar
--------------------------------

James discussed the results of the recent tests of the code from 
master/pre-2.4 on Jaguar.

   It went "more smoothly than we've experienced in the past"
   Only one job didn't complete, and probably legitimately ran out of
     disk space
   Noted that Cray 1.8 clients did not work with the new servers
   Tests included, ior, mdtest, s3d

Other
-----

James asked if LU-1812 (Fedora 18 support) could still land after the 
"feature freeze" date.  Peter said that LU-1812 is considered a "minor 
enhancement", and since it is well on its way to completion and has 
little to no impact on the rest of the code, it is not constrained by 
the "feature freeze" date.

Andreas asked about the two competing FC18/SP2 patche series.  James 
reported that they are working together and have consolidated most of 
their work.  Some patches for ldiskfs not yet merged, but in the works.

James asked about patchless server for 2.4.  We are close to patchless, 
but it looks like 2.4 will not quite eliminate the patches.  Therefore 
the FC18/SP2 patches should be included.

Andreas mentioned that Xyratex submitted mdraid patches to add to the 
kernel patch series.  Those have a good chance to land for 2.4.  When we 
go patchless, they'll need to move somewhere else.  Would be nice if 
Xyratex can get those patches landed upstream.

Chris

On 01/28/2013 11:10 AM, Hamilton, Pam wrote:
> Hi all,
> Chris Morrone has graciously volunteered to facilitate this week’s CDWG
> call. The call will be at our normal time, Wednesday, January 30th, at
> 9am Pacific.
> Agenda:
>
>   * OpenSFS Community Survey 2013 – Here is a link to the proposed
>     survey, please take a look at it before the call so we can decide if
>     it’s good to go:
>
> _http://www.surveymonkey.com/s/LWQC8LM_
>
>   * Lustre 2.4 feature freeze update
>   * Open discussion
>
> Call-in: 866-914-3976 (925-424-8105) Passcode: 534986#
> Regards,
> Pam