I recall that JOBAGGREGATIONTIME is good. Normally torque tells maui to run a scheduling cycle each time a new jobs arrives. This parameter tells maui to hold off cycling too frequently - which is something you want as long as it's not so infrequently that the cluster starts to go idle. Lots of very short jobs are hard work to schedule!
Gareth > -----Original Message----- > From: Arnau Bria [mailto:[email protected]] > Sent: Thursday, 29 September 2011 7:30 PM > To: [email protected] > Subject: Re: [Mauiusers] maui limits? looking for experience > > On Wed, 28 Sep 2011 19:56:56 -0400 > Gus Correa wrote: > > > Hi Arnau, Jason > Hi Gus, > > > Well, I guess I should consider myself happy > > to administer only small clusters. :) > > > > Now, how about the [terse] guidance in the Maui Admin Guide for large > > clusters? > > > http://www.adaptivecomputing.com/resources/docs/maui/a.ilargeclusters.p > hp > > I have many doubts about those params, maybe it's time to ask about > them :-) > > NODEPOLLFREQUENCY: with a RMPOLLINT of 1 minute and NODEPOLL to 3, > during those 3 minutes that maui is not going to ask about node status, > if a node goes from busy to free on minute 1, maui is not going to > schedule jobs there until the 3 scheduling cycle starts... is that > correct? > > > JOBAGGREGATIONTIME: I don't really understand what this paramater does, > but it talks about burtsy submission, not about long queues. > > > > And the [slightly more verbose] one for Torque: > > > http://www.adaptivecomputing.com/resources/docs/torque/a.flargeclusters > .php > > Some time ago we did configure all those params (ping/check rate and > tcp_timeout) and torque works fine. But, from torque point of view, > 350 nodes is not a "big cluster", so it scales fine. > > > > Would them help with scalability? > Till now, limiting idle queue improved maui behaviour.... > > > Cheers, > > Gus Correa > Cheers, > Arnau _______________________________________________ mauiusers mailing list [email protected] http://www.supercluster.org/mailman/listinfo/mauiusers
