[Vagnekman-users] Accumulus Service Downtime Monday May 23

[Kent Engström]

Dear Users of the Accumulus Storage,

some of you have been reporting spurious problems with the Lustre
filesystems, such as recently created files being seen with 
size 0 on other nodes afterwards, for some time.

Thanks to your effort in isolating the problems and a lot of work here
at NSC, we have been able to reproduce the problem reliably. We have
reported the error to the Lustre developers and helped testing the fix,
and there is now a working fix for the problem.

The fix is in the Lustre server, not the client. That means that we will
need to update the servers. After talking to our user contacts,
we have scheduled this downtime for Monday May 23, starting at 09.00
CEST and continuing until we are done. We should be up and running
during the day.

During the downtime, the Accumulus Lustre filesystems (all of /nobackup
except the oldest parts) will not be available on Gimle or Vagn.


Sincerely,
-- 
Kent Engström, National Supercomputer Centre
kent at nsc.liu.se, +46 13 28 4444