[Mauiusers] Maui not scheduling when available resources II

Arnau Bria arnaubria at pic.es
Wed Dec 22 04:00:03 MST 2010


Hi all,

this issue has some history:

My original problem:
http://www.supercluster.org/pipermail/mauiusers/2009-February/003711.html
Roy's solution:
http://www.supercluster.org/pipermail/mauiusers/2009-February/003732.html

Briefing: maui never schedules all IDLE queue. 

The scenario:
you have 2 queues, quque A looking for nodes with priority A (PA) and
queueu B lookinf for nodes with priority B (PB).
Nodes with PA are all busy, but you have many jobs in queue A.
Nodes with PB are free, and many jobs in queue B.


So, if jobs in queueA are in top of global IDLE queue, jobs from queue
B, which are in bottom, have resources available but they are never
scheduled. Maui says:

# checkjob 14611086


checking job 14611086

State: Idle
Creds:  user:lhpilot002  group:lhpilot  class:test  qos:lhclhcb
WallTime: 00:00:00 of 8:00:00
SubmitTime: Wed Dec 22 11:07:07
  (Time Queued  Total: 00:39:32  Eligible: 00:39:32)

StartDate: -00:36:30  Wed Dec 22 11:10:09
Total Tasks: 1

Req[0]  TaskCount: 1  Partition: ALL
Network: [NONE]  Memory >= 0  Disk >= 0  Swap >= 0
Opsys: [NONE]  Arch: [NONE]  Features: [test]


IWD: [NONE]  Executable:  [NONE]
Bypass: 0  StartCount: 0
PartitionMask: [ALL]
PE:  1.00  StartPriority:  7
job can run in partition DEFAULT (120 procs available.  1 procs required)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^


This problem was solved by Roy with a path, but this patch has not been
introduced into prod branch and I see no solution to this problem in
maui's doc.

So now I'm wondering if we're doing something wrong or if it's real a
big maui's bug which need urgent solution (meanwhile I'll use Roy's
patch again).

So, what are other admins with similar scenario solving this issue?

maui-server-3.3-1.x86_64

TIA,
Arnau


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