[GE users] question on slotwise preemption configuration

cjf001 john.foley at motorola.com
Thu Jul 22 21:45:50 BST 2010


Stephen -

looks like a winner ! I'll give it a try, and send you a separate email
regarding the qmaster binary.

   Thanks,

      John


stephendennis wrote:
> Hi John
>
> We work around the necessity of providing the slot counts with syntax and
> configuration like this.
>
> subordinate_list=slots=8(low:2:sr), \
>    [@4_slot=slots=4(low:0:sr)], \
>    [@8_slot=slots=8(low:1:sr)]
>
> As you can see we set host groups for each range of slot counts.
>
> There is a bug in 6.2u5 which leaves jobs in suspension sometimes
> http://gridengine.sunsource.net/issues/show_bug.cgi?id=3233
>
> SGE Engineering tells me that it is fixed in 6.2u6
>
> We have a patched version of lx24-amd64 qmaster for version 6.2u5 which addresses
> the issue which I can provide if you contact me of list.
>
> Thanks
> Stephen
> ________________________________________
> From: cjf001 [john.foley at motorola.com]
> Sent: Thursday, July 22, 2010 3:47 PM
> To: users at gridengine.sunsource.net
> Subject: [GE users] question on slotwise preemption configuration
>
> 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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# John Foley                          # Location:  IL93-E1-21S            #
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