OSCER users,


Schooner/OURRstore scheduled maintenance outage
Wed Oct 11 8am-midnight

Details are earlier in this e-mail thread.


Before the scheduled maintenance outage starts on 
Wed Oct 11 8:00am:

Jobs that wouldn't finish before the scheduled maintenance 
outage starts won't be able to start at all, until after the 
scheduled maintenance outage has ended (planned for 
Wed night at midnight).

Because, by this approach, such jobs can run for 
the full wall clock time limit that they've requested.

So, if you want a job to run before the scheduled 
maintenance outage begins, then in your batch scripts, 
you might need to reduce the amount of wall clock 
time limit you request.

(Once the maintenance period ends, this won't apply 
any more.)

If you have jobs that you've already submitted that are 
pending in the queue, then you might want to reduce 
their requested wall clock time limit, to give them 
a chance to start before the scheduled maintenance 
outage begins.

The command is:

scontrol update JobId=######## TimeLimit=DD-HH:MM:SS

except REPLACE ######## with the job ID number, and 
REPLACE DD-HH:MM:SS with 2-digit number of days, 
2-digit number of hours (beyond the number of days), 
2-digit number of minutes (beyond the days and hours) 
and 2-digit number of seconds (beyond the days, hours 
and minutes).

You have to pick a wall clock time limit short enough that 
the job can run to its time limit before the start of the 
scheduled maintenance outage.

For example, suppose job 123456 had requested 48 hours of 
wall clock time limit, but now there are less than 48 hours 
before the start of the scheduled maintenance outage.

So job 123456 won't be able to run until after the 
scheduled maintenance outage ends.

But, we could change the requested wall clock time limit 
for job 123456 to, for example, 30 hours, like this:

scontrol update JobId=123456 TimeLimit=01-06:00:00

In that case, job 123456 would have a *CHANCE* 
(but NOT A GUARANTEE) to run before the outage starts.


From: Neeman, Henry J. <[log in to unmask]>
Sent: Friday, October 6, 2023 7:15 AM
To: [log in to unmask] <[log in to unmask]>
Subject: Schooner scheduled maintenance outage

OSCER users,


Schooner/OURRstore scheduled maintenance outage
Wed Oct 11 8am-midnight


On Wed Oct 11 8am-midnight, OSCER will hold a scheduled
maintenance outage for the Schooner supercomputer and
the OURRstore tape archive, specifically:

* Update job scheduler software SLURM to version 23 on
the Schooner supercomputer.

* Update the configuration on the supercomputer Ethernet

* Shift the OURRstore Ethernet switches in Norman to
the new second tape library at OUHSC (to be delivered soon).

As always, we apologize for the inconvenience -- our goal
is to make OSCER capabilities even better!

The OSCER Team ([log in to unmask])