[Mauiusers] adjust priorities based on group usage

Greenseid, Joseph M (IS) Joseph.Greenseid at ngc.com
Fri Apr 23 14:08:35 MDT 2010

i have not tried it this way, but  could you try something like:
CLASSCFG[my_queue] FSTARGET[GROUP:group1]=25
CLASSCFG[my_queue] FSTARGET[GROUP:group2]=25
for all 4 groups?
i'd think that the CLASSCFG[my_queue] should limit the fairshare allocation to just the my_queue class?


From: Steve Young [mailto:chemadm at hamilton.edu]
Sent: Fri 4/23/2010 2:22 PM
To: Greenseid, Joseph M (IS)
Cc: mauiusers at supercluster.org
Subject: Re: [Mauiusers] adjust priorities based on group usage

Were trying not to use fairshare in this situation. Basically we just want to decrease a group's job's priority so that the other groups are favored until the resources of the queue are balanced out between all the active groups. Also, I was under the impression that fairshare is calculated across the whole grid so I'm not sure it would work out for us. If one group was using their queue of the resources they owned and then tried to use the other queue of resources that are shared across the 4 groups, fairshare would be calculated across all the queue's correct? 


On Apr 23, 2010, at 10:26 AM, Greenseid, Joseph M (IS) wrote:

	have you looked at setting fairshare targets for each group for this queue? 


	From: mauiusers-bounces at supercluster.org on behalf of Steve Young
	Sent: Thu 4/22/2010 3:49 PM
	To: mauiusers at supercluster.org
	Subject: [Mauiusers] adjust priorities based on group usage

	        I'm trying to devise a solution with maui 3.3 in order to support a 
	requirement to balance out resources by groups over a class (queue). 
	We have a few different queue's bound to certain sets of resources. 
	Our newest cluster (288 cores) is shared between 4 different groups. 
	I'm trying to figure out how to have priority figured out so that this 
	new cluster would give a higher priority to the groups that are using 
	it the least. So for example, two groups are using the cluster... each 
	group should be allowed to utilize 50% of the resources of this queue. 
	As soon, as a third or fourth group starts using the resources they 
	would end up being highest priority until the percentages balanced out 
	to 33% or 25% (3 or 4 groups). My first thought is to try something 
	like UPROCWEIGHT and set it to a negative number (-1) so that a 
	person's priority should go down if they are using lots of processors 
	already. However, this would seem to be a user based approach and 
	wouldn't help in keeping the balance between groups. Perhaps, if there 
	were a GPROCWEIGHT that would be what I am looking for.
	        Also, as I mentioned before we have one central queue system with 
	many queue's of different resources. In the previous paragraph I 
	explained how we want to balance one of the clusters (queue) between 4 
	groups. However, I don't want to come up with this scenario and have 
	it apply to the whole grid. There are other queue's (clusters) that 
	belong to only one group so I would only want that group to be able to 
	utilize all of those resources without having it effect the balancing 
	of the queue with the shared resources (of 4 groups).
	        At any rate I hope I make some sense here ;-)... I'm looking for any 
	suggestions on how I can accomplish something like this or how other 
	places have implemented this. Thanks in advance for any advise!
	mauiusers mailing list
	mauiusers at supercluster.org

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