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<p>To Whom It May Concern,</p>
<p>Please find the minutes <a moz-do-not-send="true" href="https://halldweb.jlab.org/wiki/index.php/GlueX_Software_Meeting,_July_6,_2021#Minutes">here</a>
and below.</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, July 6, 2021, </span><span class="mw-headline" id="Minutes">Minutes</span></h2>
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<p>Present: Thomas Britton, Sean Dobbs, Mark Ito (chair),
Igal Jaegle, Naomi Jarvis, Simon Taylor, Beni Zihlmann
</p>
<p>There is a <a rel="nofollow" class="external text" href="https://bluejeans.com/s/Jy05QsGESGb/">recording
of this meeting</a>. Log into the <a rel="nofollow" class="external text" href="https://jlab.bluejeans.com">BlueJeans site</a>
first to gain access (use your JLab credentials).
</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/2021-July/008575.html">Small
Cache File Report</a> We went over the web page that
Mark sent around last week. Thomas has started moving
small files generated by MCwrapper off the cache disk.
Sean requested finer-grained information on the
location of the problematic files.</li>
<li> <a rel="nofollow" class="external text" href="https://mailman.jlab.org/pipermail/halld-offline/2021-July/008574.html">new
hdgeant4 ability to generate mu+mu- pairs in GlueX
target</a> Richard added this new feature to help
with CPP simulations.
<ul>
<li> <a rel="nofollow" class="external text" href="https://mailman.jlab.org/pipermail/halld-offline/2021-July/008576.html">New
version of hdgeant4: 2.25.0, new version set:
4.42.0</a> This new version set contains a new
tag of HDGeant4 with this feature.</li>
</ul>
</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,_June_22,_2021#Minutes" title="GlueX Software Meeting, June 22, 2021">minutes
from the meeting on June 22nd</a>. There was some
significant discussion on action items. Some were
dropped. See the list list below for the survivors.
</p>
<h3><span class="mw-headline" id="Minutes_from_the_Last_HDGeant4_Meeting">Minutes
from the Last HDGeant4 Meeting</span></h3>
<p>We went over the <a href="https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_June_29,_2021#Minutes" title="HDGeant4 Meeting, June 29, 2021">minutes from
the meeting on June 29th</a>. On the version upgrade
front, Mark has succeeded in building the following
combination:
</p>
<ul>
<li> CentOS 7</li>
<li> Developer Toolset 8 (gives GCC 8.3.1)</li>
<li> ROOT 6.24.00</li>
<li> Geant4 10.06.p01</li>
</ul>
<p>He is in the process of packaging the build and use
instructions.
</p>
<h3><span class="mw-headline" id="Report_from_the_July_1st_SciComp_Meeting">Report
from the July 1st SciComp Meeting</span></h3>
<p>Mark went through the <a rel="nofollow" class="external text" href="https://halldweb.jlab.org/talks/2021/scicomp_agenda_2021-07-01.pdf">agenda
of the meeting</a>. Present at the meeting were Brad
Sawatzky, Bryan Hess, Graham Heyes, Markus Diefenthaler,
Mark Ito, David Lawrence, Amitoj Singh, Ole Hansen,
Nathan Baltzell, and Chris Larrieu. Mark made some
remarks about the discussion at the meeting:
</p>
<ul>
<li> Mark's clean up efforts on /work/halld have stopped
with the hope that we have enough margin to make it to
release of space on the new work file server. We are
at 94% full right now.</li>
<li> For the last batch of tapes sent to IBM for
recovery, uncorrupted files were re-written to tape
before the damaged tape was shipped, vastly reducing
the number of unavailable files.</li>
<li> The list of high-priority files missing from the
tape library, given to SciComp, is moot at this late
stage of recovery. We wait for the normal process to
complete.</li>
<li> There was discussion of <a rel="nofollow" class="external text" href="https://rucio.cern.ch/">Rucio</a>
as a possible solution to tracking files generated by
data taking and launches. A database of such files
could help in deciding if a production effort is done
by making it possible inventory the output files
produced and determine if any files are missing.</li>
</ul>
<h3><span class="mw-headline" id="Work_Disk_Performance">Work
Disk Performance</span></h3>
<p>Beni recalled that, some years ago, Alex Austregesilo
had trouble merging files using the work disk. The
method used at the time generated so much activity that
the disk was rendered unusable for all. He wondered if
this was a problem that is still with us.
</p>
<p>Mark remarked that he is thinking about future guidance
on what disk should be used for which purpose. Volatile:
staging of large output files; cache: files to be
written to tape; work: personal builds and tests. Beni
commented that we stopped worrying about work disk space
during 2020 because there was plenty of space available.
</p>
<h3><span class="mw-headline" id="Action_Item_Review">Action
Item Review</span></h3>
<ol>
<li> Decide on needed tape volume sets. (Sean, Mark I.)</li>
<li> Review disk usage when re-repatriating recon launch
data. (Alex, Mark)</li>
<li> Automatically make CCDB entries for selected RCDB
items. (Mark I.)</li>
<li> Modify the documentation on how to copy files from
JLab. (Mark I.)</li>
<li> Generate finer-grained info on small cache files.
(Mark I.)</li>
</ol>
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