[Halld-offline] Offline Software Meeting Minutes, October 28, 2015

[Mark Ito]

Folks,

Please find the minutes below and at

https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_October_28,_2015#Minutes

   -- Mark
_________________________________


  GlueX Offline Meeting, October 28, 2015, Minutes

Present:

  * *FSU*: Brad Cannon, Alyssa Henderson
  * *FIU*: Mahmoud Kamel
  * *JLab*: Amber Boehnlein, Mark Ito (chair), Kei Moriya, Nathan
    Sparks, Justin Stevens, Beni Zihlmann
  * *KC*: Paul Mattione
  * *NU*: Sean Dobbs

There is arecording of this meeting <https://bluejeans.com/s/8Kew/>on 
the BlueJeans site.


    Announcements

  * *new Version Management System features*. Mark described the
    changes: URL checking for Git clones and hash-specific check-outs,
    See theupdated document
    <http://argus.phys.uregina.ca/cgi-bin/public/DocDB/ShowDocument?docid=2793>for
    details. There is also anHTML version
    <https://halldweb.jlab.org/docs/gluex_build/>now.
  * *Doxygen fixed*: Beni noticed that theDoxygen site
    <http://www.jlab.org/Hall-D/software/HDSoftware_Documentation/>was
    out-of-date. The update had been broken with recent changes to the
    nightly builds. Mark has restored the nightly updates.
  * *New releases: sim-recon 1.6.0 and HDDS 3.4
    <https://mailman.jlab.org/pipermail/halld-offline/2015-October/002155.html>*.
    Mark reminded us about these releases.
  * *Private wiki <https://halldweb.jlab.org/wiki-private>getting
    there*. Mark flashed the new site, which still under construction.
    The "Private:" pages have been migrated, but have been deleted from
    the public site yet. Links from the private to the public wiki can
    be made with wiki links ([[]]) by prepending "public:" to the page
    name, e. g., "public:Meetings".
  * *Recent additions to the Offline FAQ
    <https://halldweb.jlab.org/wiki/index.php?title=GlueX_Offline_FAQ&diff=70904&oldid=70249>*.
    Mark highlighted the latest additions.
  * *Build on new Ubuntu release*. Beni's announced that he has
    succeeded with a build of the GlueX software on Ubuntu 15.10 using
    the GCC 5.2 compiler. Some changes were required to CCDB and root2email.


      Review of minutes from October 14

We went overminutes from the October 14 meeting 
<https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_October_14,_2015#Minutes>.

*New Work Disk*. Last week we switched over to a new file server for the 
work disk. The new space is based on Lustre. There are a couple of issues.

 1. SQLite files will not work from a Lustre partition.
 2. Builds have been observed to be significantly slower on the new disk
    (factors of a few). Speculation is that this is due to poor
    performance for small files with Lustre.

We decided to ask SciComp to allow us to retain the space we had been 
using on the old traditional file server (14 TB) and use that for these 
specialized purposes.


      Data Challenge 3 update

Mark found that the reconstruction forDC3 
<https://halldweb.jlab.org/wiki/index.php/Data_Challenge_3>was not 
working judged from the ROOT files. He has decided to start from the 
beginning, generating new input data, using the latest release.

Sean mentioned that we might want to double-check that reconstruction of 
simulated data, converted from HDDM to EVIO, still works with the latest 
version of the reconstruction.


      Offline Monitoring

Kei gave the report. Seehis slides 
<https://halldweb.jlab.org/wiki/images/1/1b/2015-10-27-offline_monitoring.pdf>for 
the details. The bullets from his final slide:

  * Due to new plugins, now require 8GB of RAM to run jobs - some
    pruning of unnecessary histograms would be welcome
  * There are some crashes/errors reported in the log files - will send
    out notices
  * Will redo studies of time/resources against #cores/threads shown at
    collaboration meeting with improvements in tracking
  * Next launch: November 6 (Fri)
  * SWIF has changed underlying job structure, still rewriting
    cross-analysis scripts
  * Will add instructions to wiki

Sean suggested contacting individuals about their histograms if we 
really want to reduce the memory footprint.


      Sim1

Sean discussed planning forthe next simulation run 
<https://halldweb.jlab.org/wiki/index.php/Sim1_Conditions>. Mark has run 
the first few test jobs. Sean asked for input on the final conditions. 
Justin thought we should try to match conditions in the Spring. Sean 
also wants to have substantial statistics for this effort. Kei asked 
about the magnetic field setting. At the calibration we settled on 1300 
A as a reasonable guess. Mark created a "gluex_simulations" repository 
on GitHub to version control the settings for this simulation. Sean 
added some scripted checks that the simulation settings are reasonable 
for this effort. Sean mentioned that the plan was to use the standard 
SQLite CCDB file and lock down the version of the constants by 
specifying the timestamp. Justin suggesting using a slightly lower bound 
on the energy range to ensure that lower energy background events that 
might sneak into the sample in real data are present in the simulated 
sample. We settled on 5 GeV at a reasonable guess, although this 
question could stand more study.


      Review of recent pull requests

We went overthe list 
<https://github.com/JeffersonLab/sim-recon/pulls?q=is%3Aopen+is%3Apr>going 
back about two weeks.

Sean commented on his change to throw an exception on CCDB errors so 
that the failure comes near the point of the error.

Mark asked that folks try to provide meaningful comments when merging 
pull request. Often the best description of proposed changes comes when 
the pull request is first composed; copy and pasting that is a good 
start. That original description does not appear to make it into the git 
repository by default; it seems to exist only on the GitHub site.

Retrieved from 
"https://halldweb.jlab.org/wiki/index.php?title=GlueX_Offline_Meeting,_October_28,_2015&oldid=70922"

  * This page was last modified on 31 October 2015, at 20:38.


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