[Halld-offline] Software Meeting Minutes, December 10, 2019

[Mark Ito]

Please find the minutes here 
<https://halldweb.jlab.org/wiki/index.php/GlueX_Software_Meeting,_December_10,_2019#Minutes> 
and below.


    GlueX Software Meeting, December 10, 2019, Minutes

Present:

  * *JLab: * Alex Austregesilo, Thomas Britton, Mark Dalton, Mark Ito
    (chair), Igal Jaegle, Naomi Jarvis, David Lawrence, Keigo Mizutani,
    Justin Stevens, Simon Taylor, Beni Zihlmann
  * *FSU: * Sean Dobbs

There is a recording of his meeting <https://bluejeans.com/s/60@6B/> on 
the BlueJeans site. Use your JLab credentials to access it.


      Announcements

 1.  From the Computer Center: CentOS 7.7 update and post-Thanksgiving
    plans
    <https://mailman.jlab.org/pipermail/halld-offline/2019-November/003825.html>:
    New AMD farm nodes and more Lustre space.
 2. GlueX Software build for JLab CentOS 7.7
    <https://mailman.jlab.org/pipermail/halld-offline/2019-December/003832.html>:
    CentOS7.7 treated as a separate platform, complete build on it is
    available.
 3. MCwrapper 2.3.0 (Frost Release)
    <https://github.com/JeffersonLab/gluex_MCwrapper/releases/tag/v2.3.0>
    Thomas released this today. It contains many, accumulated
    improvement, most of them under the hood, include multi-process
    monitoring of jobs. See the release notes for details.


      Conversion from Python 2 to Python 3

Beni raised the issue. He is concerned that future distributions of 
Linux will not support Python 2. We may have to react to this as early 
as January 2020, when support of Python 2 will be withdrawn. Mark 
thought that the problem may not be all that pressing. He advocates 
conversion as we identify problems maintaining critical portions of our 
Python 2 code base.


      Review of Minutes from the November 26 Meeting

We went over the minutes 
<https://halldweb.jlab.org/wiki/index.php/GlueX_Software_Meeting,_November_26,_2019#Minutes> 
without significant comment.


      Review of Minutes from the December 3 Meeting

We went over the minutes 
<https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_December_3,_2019#Minutes> 
without significant comment.


      New Version Set and Build

Beni requested a new version set. The current default will not support 
analysis of the data currently being obtained. Mark I. put it on his list.


      CCDB 2.0 On the Way

Mark reported that Dmitry is nearly ready to release CCDB 2.0. It will 
have improvements including the ability to freeze variation ancestors 
with letting the variation of interest move forward in time. This can be 
done without in a way that is fully backward compatible: old code and 
new code can use the same updated schema. The greatly simplifies 
implementation in comparison with what one might have expected for a 
schema change.


      RCDB Errors in the Counting Room

Naomi and Justin reported problems with RCDB information 
<https://logbooks.jlab.org/entry/3748503> being recorded as we take 
data. Naomi will contact Sergey Furletov or Dmitry Romanov or both in an 
as-yet-to-be-specified order about the problem.


      MySQL Server Problems: hallddb-farm.jlab.org

hallddb-farm is the recommended server to use on the JLab farm for 
accessing CCDB data. Kevin Luckas and Justin have reported jobs hanging 
forever 
<https://groups.google.com/forum/#!topic/gluex-software/eG6cmxZxyTM> 
when using this server, both from within batch jobs and interactively. 
Mark I. started looking into it but ran into other, unrelated problems. 
This needs to be addressed soon!


      genBH and Non-Standard HDDM Output Data

Mark D. reported problems with genBH, an optionally built event 
generator from the HDGeant4 repository. It produces output in the 
hddm_mc_s schema of HDDM and not in the usual hddm_s schema. Programs 
downstream of event generation cannot grok these events. He has modified 
a private version to use hddm_s. The package requires Richard's Dirac++ 
package, which we do not build as part of the standard software stack. 
There was discussion, not conclusive, about whether the modified version 
should be put into some other repository, presumably halld_sim.


      Action Item Review

 1. Create and build a new version set. (Mark)
 2. Test and debug hallddb-farm.jlab.org.
 3. Figure out what to do with genBH.

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  * This page was last modified on 10 December 2019, at 20:51.

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