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<p>Folks,</p>
<p>Please find the minutes below and <a moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Software_Meeting,_August_6,_2019#Minutes">here</a>.</p>
<p> -- Mark</p>
<p>_________________________</p>
<p>
</p>
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<h2 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">GlueX Software Meeting, August 6, 2019, </span><span
class="mw-headline" id="Minutes">Minutes</span></h2>
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lang="en">
<p>Present:
</p>
<ul>
<li> <b> FSU: </b> Sean Dobbs</li>
<li> <b> JLab: </b> Mark Ito (chair), David Lawrence,
Simon Taylor, Beni Zihlmann</li>
</ul>
<p>The meeting was called to order at 3:00 pm
</p>
<p>There is a <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/1CURS/">recording of
this meeting</a> on the BlueJeans site. Use your JLab
credentials to access it.
</p>
<h3><span class="mw-headline" id="NERSC_Update">NERSC
Update</span></h3>
<p>David gave us a status update.
</p>
<ul>
<li> Test jobs submitted last Thursday did not run. They
were canceled by NERSC staff for not-well-specified
reasons.</li>
<li> The jobs were re-submitted yesterday. Those too are
at risk of being canceled. The problem is under
investigation.</li>
<li> Our jobs seem to be running into a problem with
DVS, the NERSC system for compute nodes to access
central disks.</li>
<li> 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.</li>
<li> On the bright side, a transfer rate of 10 Mb/s was
observed for several hours at a time.</li>
</ul>
<h3><span class="mw-headline" id="Announcements">Announcements</span></h3>
<ol>
<li> <a rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/jlab-scicomp-briefs/2019q3/000219.html">Cache
disk outage on Aug. 8</a>. Mark reminded us about
the outage.</li>
<li> <a rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/halld-offline/2019-July/003718.html">Version
set for reconstruction of Fall 2018 data at NERSC:
recon-2018_08-ver02_1.xml</a>.</li>
<li> <a rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/halld-offline/2019-July/003721.html">New
update version set: version_4.7.0.xml</a>. Includes
new versions of AmpTools and RCDB.</li>
<li> <a rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/halld-offline/2019-August/003724.html">MCwrapper-bot
issues</a>. There was a delay in processing
simulation jobs due to site configuration issues.</li>
<li> <a rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/halld-offline/2019-August/003725.html">New
release of build_scripts: version 1.51</a>. New
packages hepmc, photos, and evtgen introduced with
this release.</li>
</ol>
<h3><span class="mw-headline"
id="Review_of_minutes_from_the_last_Software_Meeting">Review
of minutes from the last Software Meeting</span></h3>
<p>We went over the <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Software_Meeting,_July_23,_2019#Minutes"
title="GlueX Software Meeting, July 23, 2019">minutes
from July 23</a>.
</p>
<ul>
<li> <b>Flat Launches</b>. Analysis launches to produce
"flattened" analysis trees were discussed at <a
rel="nofollow" class="external text"
href="https://halldweb.jlab.org/wiki-private/index.php/July_31,_2019,_Analysis_Working_Group">the
last Production and Analysis meeting</a>. 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.</li>
<li> The problem with multi-run reconstruction jobs
remains an issue.</li>
</ul>
<h3><span class="mw-headline" id="Event_Generator_Updates">Event
Generator Updates</span></h3>
<p>Sean described recent work on simplifying generation of
prompt particle decays in all of our event generators.
See <a
href="https://halldweb.jlab.org/wiki/images/e/e4/Sdobbs_offline_20190806.pdf"
class="internal" title="Sdobbs offline 20190806.pdf">his
slides</a> for the details.
</p>
<ul>
<li> Particle decays are handled by the <a
rel="nofollow" class="external text"
href="https://evtgen.hepforge.org/">EvtGen package</a>.
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.</li>
<li> 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.</li>
<li> The modification to build_scripts mentioned above
in the announcements will build the packages needed to
support this scheme.</li>
<li> 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.</li>
</ul>
<h3><span class="mw-headline"
id="Review_of_recent_issues_and_pull_requests">Review
of recent issues and pull requests</span></h3>
<p>We did not do the review.
</p>
<h3><span class="mw-headline"
id="Review_of_recent_discussion_on_the_GlueX_Software_Help_List">Review
of recent discussion on the GlueX Software Help List</span></h3>
<p>We skipped this review as well.
</p>
<p>We adjourned at 3:58 pm.
</p>
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