[Mauiusers] Help with Maui

Steve Young chemadm at hamilton.edu
Thu Jun 26 08:19:00 MDT 2008

I'm also assuming that if I were to increase my RMPOLLINTERVAL (in  
maui) that I would be able to process more jobs from torque each  
poll? What kinds of RMPOLLINTERVAL's did you have set? Just curious.  


On Jun 26, 2008, at 9:06 AM, Ronny T. Lampert wrote:

>> I had a similar situation with a user submitting 7,000 jobs at a  
>> time. Like you point out maui can't seem to keep up with  
>> scheduling all of them. After posting to the list it was suggested  
>> that I create a routing queue in torque:
>> create queue physics
>> set queue physics queue_type = Route
>> set queue physics acl_group_enable = True
>> set queue physics route_destinations = pompeii
>> set queue physics enabled = True
>> set queue physics started = True
>> Then for the destination queue pompeii I put in the following rule:
>> set queue pompeii max_queuable = 50
>> This setup is working well. Torque manages to keep 50 jobs in the  
>> pompeii execution queue at all times. Maui is happy since it  
>> doesn't have to go through thousands of jobs each iteration, which  
>> it couldn't run anyhow due to lack of resources. (I wish we had  
>> thousands ;-)).
> Please note that ANY! newer jobs that might trigger preemption will  
> NO LONGER WORK with this setup, since maui is only using its  
> scheduling algorithms on those 50 jobs.
> Same with higher prio jobs or similar that will/must/should be  
> executed ASAP.
> You essentially turn your setup into a "50 jobs a at time" batching  
> system.
> So, depending on your needs you should increase the max_queueable.
> Before maui I managed to run a heavily patched pbs_sched (early  
> torque releases) with I think around 20k+ jobs queued.
> After that I abandoned that setup because I needed preemption  
> (sorry, no docs left from that time).
> I had maui running with 10k+ jobs (and changed the #define so it  
> would consider 8K instead of 4K jobs for real scheduling), but it's  
> not nice and it'll eat memory like it's sugar (500MB+ RSS).
> And I still think scheduling over 8K jobs is far too less for such  
> a system.
> Because ATM I no longer have this setup in operation I did stop  
> working privately on maui to remedy those shortcommings.
> BR,
> Ronny
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