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<p>Friends,</p>
<p>Please find the minutes <a moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Software_Meeting,_November_10,_2020#Minutes">here</a>
and below.</p>
<p> -- Mark</p>
<p>____________________________________________________</p>
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<h2 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">GlueX Software Meeting, November 10, 2020, </span><span
class="mw-headline" id="Minutes">Minutes</span></h2>
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lang="en">
<p>Present: Alex Austregesilo, Sean Dobbs, Mark Ito
(chair), Naomi Jarvis, David Lawrence, Simon Taylor,
Nilanga Wickramaarachchi, Beni Zihlmann
</p>
<p>There is <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/E4_DES5XVPW/">a
recording of his meeting</a> on the BlueJeans site.
Use your JLab credentials to authenticate.
</p>
<h3><span class="mw-headline" id="Announcements">Announcements</span></h3>
<ol>
<li> <a rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/halld-offline/2020-October/008350.html">work
disk full again</a>. We are still very limited on
space. Only 14 TB free (6%). See <a rel="nofollow"
class="external text"
href="https://halldweb.jlab.org/disk_management/work_disk_2.png">this
plot</a> of current usage.</li>
<li> <a rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/halld-offline/2020-November/008364.html">New
release of Build Scripts: version 2.3</a>. Sets us
up to have builds on more advanced distributions,
e.g., CentOS 8.</li>
<li> <a rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/halld-offline/2020-November/008366.html">New
git repository: hd_singularity</a>. New repository
with scripts for building Singularity containers.</li>
<li> <a rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/halld-offline/2020-November/008370.html">New
version set: 4.30.0</a> Update version set.</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 <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Software_Meeting,_October_13,_2020#Minutes"
title="GlueX Software Meeting, October 13, 2020">minutes
from the October 13th meeting</a>.
</p>
<h4><span class="mw-headline"
id="Scientific_Computing_Hardware">Scientific
Computing Hardware</span></h4>
<p>Mark reported some news from SciComp.
</p>
<ul>
<li> The tape library upgrade last week went well. After
two libraries were converted to one all tapes are
loadable into all drives.</li>
<li> The Computer Center is very close to allowing jobs
from the OSG to run on the JLab farm.</li>
<li> The work disk space will be supplemented by
2018-era file servers in the not-too-distant future.</li>
<li> More farm nodes are being purchased, perhaps with
the new AMD Milan architecture. It should come to
about 80 more nodes.</li>
</ul>
<h4><span class="mw-headline"
id="Future_Trends_in_Nuclear_Physics_Computing">Future
Trends in Nuclear Physics Computing</span></h4>
<p>Mark mentioned that the organizing committee of the
Future Trends Workshop released a draft report at the
Round Table Meeting this morning. Comments on the draft
are welcome. Find it <a rel="nofollow" class="external
text"
href="https://docs.google.com/document/d/1HT0dQJwZkUGaxGS0bUhZgkz0l2G5QR-4Dm08-hr8DJc/edit#heading=h.w8zptkboez9w">here</a>.
</p>
<h4><span class="mw-headline" id="Unit_Testing">Unit
Testing</span></h4>
<p>Mark pointed out the package that Dmitry Romanov is
using for unit test for CCDB. It is called <a
rel="nofollow" class="external text"
href="https://github.com/catchorg/Catch2">Catch2</a>.
</p>
<h3><span class="mw-headline"
id="Review_of_recent_issues_and_pull_requests">Review
of recent issues and pull requests</span></h3>
<ul>
<li> <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/halld_recon/issues/462">halld_recon
issue #462</a> <b>TOF dE/dx written as all zeros in
monitoring hists and ROOT trees since 2020-07-10</b>.
In response to Andrew Schick's nice problem report,
Beni has submitted a fix. The problem was the result
of the introduction of dEdx1 and dEdx2 in addition to
dEdx. dEdx got lost on the way to REST.
<ul>
<li> Sean pointed out that the automatic builds,
triggered by pull requests, have stopped working
due to the input raw data file having been deleted
from the work disk. [Added in press: Mark looked
and discovered that the clean up of the pull
request test area on the work disk was targeting
the raw data file. That has been fixed now.]</li>
</ul>
</li>
<li> <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/halld_recon/issues/464">halld_recon
issue #464</a> <b>Issue with code for chi square
comparison of two trees</b>. Nilanga submitted this
issue just before the meeting. Alex is looking at it.
He sees a bug but it is not obvious why Nilanga sees
crashes. Nilanga reported that the crash does not
occur for all files.</li>
<li> <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/halld_sim/issues/169">halld_sim
issue #169</a> <b>Amplitude for MC generation using
a histogram in a ROOT file</b> Nilanga submitted a
request for a general method for specifying an
amplitude using a histogram and generating events
accordingly. Justin Stevens is working on this.</li>
<li> <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/halld_sim/issues/168">halld_sim
issue #168</a> <b>resonance seeds in gen_amp
causing inefficiency</b>. Matt Shepherd identified a
feature in gen_amp that concentrates events around 1
GeV when no resonances are specified. This is a
problem when higher masses are desired. Alex reported
that Rebecca Barsotti is working on a solution.</li>
</ul>
<h3><span class="mw-headline" id="Action_Items">Action
Items</span></h3>
<p>Copied from the last meeting:
</p>
<ol>
<li> Ask the Computer Center about staging the start of
jobs in time. (Mark)</li>
<li> Make sure that the automatic tests of HDGeant4 pull
requests have been fully implemented. (Mark, Sean)</li>
<li> Finish conversion of halld_recon to use JANA2.
(Nathan)</li>
<li> Ping Dmitry on CCDB Issue #68. (Mark)</li>
<li> Remind folks about their problematic cache files.
(Alex)</li>
<li> Finish CentOS 8 compatibility project. (Mark)</li>
</ol>
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