[intrepid-notify] ALCF BG/P Intrepid Scheduling Policy Change Notification

[Bowen Cheetah Goletz]

ALCF User Community:

In order to improve response time for large jobs and overall utilization of the 
ALCF BlueGene/P machine "intrepid", the job scheduling policy will be modified 
on Monday, April 5th.  On that date, the following change will go into effect:

Jobs submitted to the prod queue requesting 4K or fewer nodes but greater than 
six hours wall time will be restricted to rows 4 and 5.

All other job and scheduling limits remain the same, and there are no changes to 
the prod-devel queue.  Users should still submit their jobs to the prod or 
prod-devel queues as before and no changes to submission scripts are required.

Users should see a noticeable improvement in response time for large jobs 
running on 8K and 16K partitions, with such jobs starting within six hours of 
submission (barring several other large jobs already running).  We also expect 
increased scheduler efficiency for small sub-six hour jobs.  Jobs submitted to 
the 'prod' queue will automatically reroute to the queue appropriate for the job 
parameters.

Note that the full machine is five rows of eight 1K-node racks.

The full description of the job scheduling policy is available on the ALCF wiki: 
https://wiki.alcf.anl.gov/index.php/Job_Scheduling_Policy


-ALCF Support Team