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Changes between Version 22 and Version 23 of External_Supercomputing_Notes


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Timestamp:
Feb 4, 2014, 5:11:49 PM (12 years ago)
Author:
watersc1
Comment:

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  • External_Supercomputing_Notes

    v22 v23  
     1== 2014-02-04 ==
     2
     3Due to the limitations with srun, it's likely going to be easier in the future to use stask instead.  This isn't a major change in the scripting, as it's simply an issue of switching the syntax around.
     4
     5The more major shift is going to be in making sure we use the system efficiently.  The scheduling system is designed to run jobs that execute for 8-12 hours, which the current single stage-single exposure system doesn't do.  In addition, processors are allocated as full nodes (24 cores), so it's most efficient to use all of them.  A quick calculation suggests that an 8 hour, 5 node block could process ~525 exposures through chip, ~2750 through camera, or ~1000 through warp (based on some quick averages from the database dtime values).  Launching jobs of this scale requires some rethinking of how to stage things.
     6
     7I still think holding the remoteRun fixed to a single mrun command is best.  However, instead of the remoteRun defining everything, it needs to have child rows in a different table (remoteExp?) that points to the stage, stage_id, file lists, etc that are contained in the remoteRun.  This will need some work to redevelop.
     8
    19== 2014-02-03 ==
    210