[GE users] allocation rules for node usage

Bernard Li bli at bcgsc.ca
Wed Sep 8 20:27:09 BST 2004


Hi Dave:

One way to create the "not shared" usage is to create a PE with "2" as
the allocation rule.  In that case, both slots will be occupied even
though you only need one.

Cheers,

Bernard 

> -----Original Message-----
> From: Dave Stirling [mailto:dcs at et.byu.edu] 
> Sent: Wednesday, September 08, 2004 9:12
> To: users at gridengine.sunsource.net
> Subject: [GE users] allocation rules for node usage
> 
> All,
> 
> We are transitioning from a long-time LoadLeveler and PBS 
> shop to GridEngine on some of our (dual processor) Linux 
> systems, and in the conversion the question has arisen with 
> regard to node usage.  Some applications have a requirement 
> that each slot in the parallel job be run on a different node 
> (i.e., 8 slots on 8 nodes), while other applications require 
> the job to run on as few nodes as possible (8 slots on 4 nodes).
> 
> I've found the allocation rule documentation in SGE_PE(5) and 
> I see a way to do this by creating separate parallel 
> environments, one with the $fill_up allocation rule and the 
> other with the $round_robin (or "1") allocation rule.  The 
> user would then specify the appropriate pe at job submission 
> time.  Is this the best way to do this?
> 
> On a related note, I have a user asking me if it's possible 
> to request nodes in what LoadLeveler calls "not shared" 
> usage, where the entire node is reserved even though the job 
> only occupies a single slot on the node.
> Is this possible with GridEngine?
> 
> Thanks,
> 
> Dave Stirling
> Supercomputing Administrator
> Ira & Mary Lou Fulton Supercomputing Center Brigham Young University
> email: dave_stirling at byu.edu
> 
> 
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