[Halld-offline] Software Meeting Minutes, June 11, 2019

[Mark Ito]

Folks,

Please find the minutes here 
<https://halldweb.jlab.org/wiki/index.php/GlueX_Software_Meeting,_June_11,_2019#Minutes> 
and below.

   -- Mark

________________________________________________


    Minutes, GlueX Software Meeting, June 11, 2019

Present:

  * *CMU: * Naomi Jarvis
  * *JLab: * Alexander Austregesilo, Thomas Britton, Sean Dobbs, Stuart
    Fegan, Mark Ito (chair), Justin Stevens, Simon Taylor, Beni Zihlmann

There is a recording of this meeting <https://bluejeans.com/s/6V8no/> on 
the BlueJeans site. Use your JLab credentials to access it.


      Announcements

 1. New version set: recon-2018_01-ver02_1.xml
    <https://mailman.jlab.org/pipermail/halld-offline/2019-May/003659.html>.
    Version set for the recon-2018_01-ver02 launch.
 2. MCwrapper: Busy Bee Starsky release
    <https://mailman.jlab.org/pipermail/halld-offline/2019-June/003662.html>.
    This release includes a new variable ANA_ENVIRONMENT_FILE in
    MC.config to allow a different version of halld_recon for ROOT tree
    production than that used for reconstruction in the same job. This
    follows the ideas in Mark's presentation which came later in the
    meeting.
 3. two new version sets: version_4.5.0.xml and
    recon-2017_01-ver03_10.xml
    <https://mailman.jlab.org/pipermail/halld-offline/2019-June/003664.html>.
    An update release and a 2017-01-reconstruction-launch-compatible
    upgrade release.


      Review of minutes from the last Software Meeting

We went over the minutes of the meeting on May 28 
<https://halldweb.jlab.org/wiki/index.php/GlueX_Software_Meeting,_May_28,_2019#Minutes> 
without significant comment.


      Report from the last HDGeant4 Meeting

We went over the minutes from the meeting on June 4 
<https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_June_4,_2019#Minutes>. 


  * Sean asked if the addition of an intermediate buffer when reading
    EVIO files has been tested on local files, i.e., without use of
    XROOTD. This can be tested in the current default version of
    halld_recon.
  * We forgot to note the significant step forward of having an XROOTD
    server up and running on scosg16.jlab.org (the submit host).
  * Sean mentioned that there may be computing resources at Jülich that
    we can access in an OSG-like way now that they are collaborators.


      More on halld_recon, reconstruction launches, and analysis launches

Mark and Thomas summarized the discussion on the need for separate 
versions of halld_recon for reconstruction launches and analysis 
launches. Please see their slides 
<https://halldweb.jlab.org/doc-public/DocDB/ShowDocument?docid=4087> for 
the full story. The summary slide is reproduced here:

  * Need to identify pairs of halld_recon versions for some tasks
  * Discussed solutions at the last meeting
  * One such solution, two version sets, implemented in MCwrapper
  * Introduced new file, version_set_correlations.xml, to indicate valid
    pairs of version sets
  * Features:
      o Very little re-coding needed
      o Preserves build_scripts paradigm: a compatible set of tagged
        releases of software packages
      o Mechanism provided for identifying correlation between
        reconstruction halld_recon and

analysis halld_recon: new "version set correlation" XML file


      Review of recent issues and pull requests


        halld_recon issues and pull requests

  * Difference in p 3pi between 2017 low and high intensity data? #160
    <https://github.com/JeffersonLab/halld_recon/issues/160> Sean
    followed up with Elton after the meeting. This issue is closed now.
  * DL1MCTrigger Crashes With mysql rcdb/ccdb #81
    <https://github.com/JeffersonLab/halld_recon/issues/81> We should
    follow up with Jon Zarling on this one.
  * crash in ST matching #71
    <https://github.com/JeffersonLab/halld_recon/issues/71> David found
    and fixed the problem for one offending plugin. See his explanation
    at the bottom of the issue page. This is a bug of long-standing. It
    was first reported by Alex on December 18 of last year. Sean and
    Beni put a lot of work into isolating the problem.
      o Added in press: Sean did a survey of our plugins and corrected
        the problem
        <https://github.com/JeffersonLab/halld_recon/pull/174> in 60
        source files in halld_recon.
  * NaN's in the analysis library #52
    <https://github.com/JeffersonLab/halld_recon/issues/52> Sean thought
    this one might be fixed.
  * Tracking update apr19 #167
    <https://github.com/JeffersonLab/halld_recon/pull/167> Alex showed
    evidence for small changes in tracking results for a large fraction
    of tracks as a result of this pull request. He looked at t
    <https://halldweb.jlab.org/wiki/images/thumb/d/d7/Recontest_t_may2019.png/1200px-Recontest_t_may2019.png>
    and proton momentum
    <https://halldweb.jlab.org/wiki/images/thumb/7/79/Recontest_p_may2019.png/1200px-Recontest_p_may2019.png>
    from recent reconstruction tests. Simon told us that this is not
    unexpected given that some of these changes cause a different set of
    hits to be associated with a track. Alex cautioned that there might
    be some bin migration back and forth when comparing results from
    before and after this change.


      Review of recent discussion on the GlueX Software Help List

We reviewed the list items 
<https://groups.google.com/forum/#!forum/gluex-software>. Not a lot of 
comment.

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  * This page was last modified on 13 June 2019, at 13:45.

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