[Halld-offline] Data Challenge Meeting Minutes, December 3, 2012

[Mark M. Ito]

Find them at

https://halldweb1.jlab.org/wiki/index.php/GlueX_Data_Challenge_Meeting,_December_3,_2012#Minutes

and below as text.
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GlueX Data Challenge Meeting, December 3, 2012
Minutes

    Present:
      * CMU: Paul Mattione, Curtis Meyer
      * JLab: Mark Ito (chair), David Lawrence, Dmitry Romanov, Simon
        Taylor
      * UConn: Richard Jones

Conditions for DC-1

    Last Monday Mark sent out a [26]list of proposals/decisions about
    details of the data challenge. We revisited some of these items.

Keeping track of particle parentage

    Richard pointed out that a [27]recent change that Paul pulled from the
    trunk into the dc-1.1 branch did not track parent particle ID correctly
    as intended, rather it only identified parent particle type. Paul needs
    this capability for his Cerenkov studies. Richard has suggested a
    change to the code to accomplish this and volunteered to implement it.
    He will do so and check it in on branches/sim-recon-dc-1.1. Mark
    promised to merge this change onto the trunk at the appropriate point
    in the future.

Events per file

    Richard told us that 50 k events per job was [28]about optimum for grid
    sites. We adopted that number for all of the sites.

Inclusion of out-of-time interactions

    Richard proposed [29]inclusion of out-of-time interactions, both
    electromagnetic and hadronic. He pointed out that this adds realism
    which would be essential for rare decay studies. Although that point
    was not disputed, we decided that introducing this feature could be
    deferred to later challenges. Accidental background, should not
    contribute to lowest order in evaluating particle ID options. In the
    mean time we need to evaluate how our reconstruction performs with
    realistic background introduced. We have not been running in this mode
    much heretofore.

Saving the Monitoring Histograms

    Richard thought we should, on the whole, dump them; Mark thought we
    should keep them. We agreed to keep them all after Mark promised to
    look at every single histogram file personally and with great care
    (yeah, right, ;-) ). We will do this at least initially, as we go
    through the challenge we will likely re-visit this.

Site Status

      * CMU: Paul needs to see if the new 50 k run size helps his jobs
        co-exist memory-wise.
      * JLab: Mark needs to figure out why his CPU time estimate went so
        badly awry.

Start Date

    The change to enable correct parentage tracking says that we do not
    have the final software stack yet. Mark will touch base with Richard
    and Paul on Wednesday to see where we stand on this and other issues.

    Retrieved from
"https://halldweb1.jlab.org/wiki/index.php/GlueX_Data_Challenge_Meeting,_December_3,_2012"

References

   26. 
https://mailman.jlab.org/pipermail/halld-offline/2012-November/001169.html
   27. 
https://mailman.jlab.org/pipermail/halld-offline/2012-December/001186.html
   28. 
https://mailman.jlab.org/pipermail/halld-offline/2012-December/001185.html
   29. 
https://mailman.jlab.org/pipermail/halld-offline/2012-December/001182.html

-- 
Mark M. Ito
Jefferson Lab
marki at jlab.org
(757)269-5295