[Halld-offline] Software Meeting Minutes, August 6, 2019

[Mark Ito]

Folks,

Please find the minutes below and here 
<https://halldweb.jlab.org/wiki/index.php/GlueX_Software_Meeting,_August_6,_2019#Minutes>.

   -- Mark

_________________________


    GlueX Software Meeting, August 6, 2019, Minutes

Present:

  * *FSU: * Sean Dobbs
  * *JLab: * Mark Ito (chair), David Lawrence, Simon Taylor, Beni Zihlmann

The meeting was called to order at 3:00 pm

There is a recording of this meeting <https://bluejeans.com/s/1CURS/> on 
the BlueJeans site. Use your JLab credentials to access it.


      NERSC Update

David gave us a status update.

  * Test jobs submitted last Thursday did not run. They were canceled by
    NERSC staff for not-well-specified reasons.
  * The jobs were re-submitted yesterday. Those too are at risk of being
    canceled. The problem is under investigation.
  * Our jobs seem to be running into a problem with DVS, the NERSC
    system for compute nodes to access central disks.
  * A few jobs did get through and started. They ended after running up
    against the 7.5 hour time limit. A small scale test of event
    processing rate showed no change from that previously measured in
    other launches.
  * On the bright side, a transfer rate of 10 Mb/s was observed for
    several hours at a time.


      Announcements

 1. Cache disk outage on Aug. 8
    <https://mailman.jlab.org/pipermail/jlab-scicomp-briefs/2019q3/000219.html>.
    Mark reminded us about the outage.
 2. Version set for reconstruction of Fall 2018 data at NERSC:
    recon-2018_08-ver02_1.xml
    <https://mailman.jlab.org/pipermail/halld-offline/2019-July/003718.html>.
 3. New update version set: version_4.7.0.xml
    <https://mailman.jlab.org/pipermail/halld-offline/2019-July/003721.html>.
    Includes new versions of AmpTools and RCDB.
 4. MCwrapper-bot issues
    <https://mailman.jlab.org/pipermail/halld-offline/2019-August/003724.html>.
    There was a delay in processing simulation jobs due to site
    configuration issues.
 5. New release of build_scripts: version 1.51
    <https://mailman.jlab.org/pipermail/halld-offline/2019-August/003725.html>.
    New packages hepmc, photos, and evtgen introduced with this release.


      Review of minutes from the last Software Meeting

We went over the minutes from July 23 
<https://halldweb.jlab.org/wiki/index.php/GlueX_Software_Meeting,_July_23,_2019#Minutes>. 


  * *Flat Launches*. Analysis launches to produce "flattened" analysis
    trees were discussed at the last Production and Analysis meeting
    <https://halldweb.jlab.org/wiki-private/index.php/July_31,_2019,_Analysis_Working_Group>.
    Since then Alex Austregesilo has changed the reaction submission
    page and Sean has changed the output data format to included unused
    neutral hypotheses. More work is needed before implementation of the
    new style of launches.
  * The problem with multi-run reconstruction jobs remains an issue.


      Event Generator Updates

Sean described recent work on simplifying generation of prompt particle 
decays in all of our event generators. See his slides 
<https://halldweb.jlab.org/wiki/images/e/e4/Sdobbs_offline_20190806.pdf> 
for the details.

  * Particle decays are handled by the EvtGen package
    <https://evtgen.hepforge.org/>. This package is used by many
    high-energy collaborations and benefits from years of development
    effort. Control of decays is configurable via simple text files.
  * Decays are handled as a post-processor to any event generator that
    produces HDDM formatted output. Generated events are read in,
    particles decayed, and the resulting event written out in a new HDDM
    file. The result can be fed to HDGeant4. This mechanism works for
    many event generators without modification of the original code.
  * The modification to build_scripts mentioned above in the
    announcements will build the packages needed to support this scheme.
  * Implementation of the post-processor is now on a branch of the
    halld_sim repository. Sean has modified SCons on that branch to
    build it as an optional build product. He will be submitting a pull
    request soon.


      Review of recent issues and pull requests

We did not do the review.


      Review of recent discussion on the GlueX Software Help List

We skipped this review as well.

We adjourned at 3:58 pm.

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  * This page was last modified on 7 August 2019, at 09:17.

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