[GE users] question on slotwise preemption configuration

cjf001 john.foley at motorola.com
Thu Jul 22 20:47:11 BST 2010


Guys -

I have a question regarding slotwise preemption. (I did a
search of the archive and only found 2 entries with this topic,
so I don't think this has been covered... would be nice if the
searcher could search the bodies of the posts, and not just the
subjects....)

Anyway, I have 2 cluster queues - "primary" and "secondary".
"secondary" is subordinate to "primary". It was this way before
I upgraded to v6.2u5 from v6.2u2; it still works as before -
that is, if I fill the slots on a host with jobs in the secondary
queue, and then submit a job into the primary queue, all the
jobs in the secondary queue are suspended until the primary job
finishes. As expected.

So, I would like to take advantage of the slotwise preemption feature.
After reading the page at:

http://wikis.sun.com/display/gridengine62u6/How+To+Use+Slotwise+Preemption

and the queue_conf man page, I'm left wondering if this is going to
work for me, because.....

...the descriptions show a syntax of (for my case, of my "primary"
queue) :

"subordinate_list slots=2(secondary)"

where the "2" is the total number of slots on the host. And that's
my problem - my queues ("primary" and "secondary") are across all
my hosts - and some of them have 2 slots, and some have 4 slots, and
some even have 8 slots.

So, is there a way to specify my "primary" queue config that will
work for all the hosts, regardless of how many slots they have ?

(SGE knows how many slots there are on each host anyway, so I'm wondering
why we should even need to specify this number ?...)

What am I missing ?

     Thanks !

        John



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