IZ3143: Request multiple slots without using a PE

[maritac]

[Imported from gridengine issuezilla ​http://gridengine.sunsource.net/issues/show_bug.cgi?id=3143]

        Issue #:      3143             Platform:     All           Reporter: maritac (maritac)
       Component:     gridengine          OS:        All
     Subcomponent:    scheduling       Version:      6.2u3            CC:    None defined
        Status:       NEW              Priority:     P3
      Resolution:                     Issue type:    ENHANCEMENT
                                   Target milestone: ---
      Assigned to:    andreas (andreas)
      QA Contact:     andreas
          URL:
       * Summary:     Request multiple slots without using a PE
   Status whiteboard:
      Attachments:

     Issue 3143 blocks:
   Votes for issue 3143:


   Opened: Wed Sep 30 11:22:00 -0700 2009 
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Currently, when requesting multiple slots for a job, it's necessary to configure and use a parallel environment:

$ qsub -l slots=2 ./simple.sh
Unable to run job: "job" denied: use parallel environments instead of requesting slots explicitly.
Exiting.

I have some SGE users who would like the ability to request multiple slots without being required to use a parallel
environment.

   ------- Additional comments from reuti Thu Oct 1 04:49:41 -0700 2009 -------
Simple question: why?

Not requesting a PE would let SGE in the dark whether they all should be located on one and the same machine, or multiple machines. And if
you got multiple machines: how to tell the jobscript where to find them, when there is no pe_hostfile created?

If it's just for SMP jobs, you can use the default setting of a new PE without any start/stop_proc_args. Whether someone request:

-l slots=5

or

-pe smp 5

is not much of a difference and would indicate clearly to SGE that it's a parallel job and how to handle additional resource requests.

[dlove]

As Reuti said.