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<p>Folks,</p>
<p>Please find the minutes <a moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Software_Meeting,_September_15,_2020#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, September 15, 2020, </span><span
class="mw-headline" id="Minutes">Minutes</span></h2>
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lang="en">
<p>Present: Shankar Adhikari, Alex Austregesilo, Thomas
Britton, Mark Dalton, Sean Dobbs, Mark Ito (chair), Igal
Jaegle, Naomi Jarvis, Simon Taylor, Nilanga
Wickramaarachchi, Beni Zihlmann
</p>
<p>There is <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/bDwJNbkUkhV/">a
recording of his meeting</a> on the BlueJeans site.
Use your JLab credentials to authenticate.
</p>
<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,_September_1,_2020#Minutes"
title="GlueX Software Meeting, September 1, 2020">the
minutes from September 1.</a>
</p>
<ul>
<li> The space situation with the work disk is better
now. There is <a rel="nofollow" class="external text"
href="https://halldweb.jlab.org/disk_management/work_disk_2.png">about
10% (or 20 TB) free now</a>. Thanks to those who
helped in the clean up.
<ul>
<li> <a rel="nofollow" class="external text"
href="https://halldweb.jlab.org/disk_management/work_report.html">The
work disk leader board</a> in back in operation.
Go there to see who is using the most space on the
work disk.</li>
</ul>
</li>
<li> Alex's problem with a large number of NIS lookups
in DSelector jobs has resolved itself. We are not sure
why.</li>
</ul>
<h3><span class="mw-headline"
id="Talk_at_OSG_All-Hands_Meeting">Talk at OSG
All-Hands Meeting</span></h3>
<p>Mark I. reviewed some of the points he made during <a
rel="nofollow" class="external text"
href="https://halldweb.jlab.org/doc-public/DocDB/ShowDocument?docid=4669">his
talk</a> at <a rel="nofollow" class="external text"
href="https://indico.fnal.gov/event/22127/">the Open
Science Grid All-Hands meeting</a> a little over a
week ago. The talk was meant to emphasize the
relationship between the EIC and the OSG.
</p>
<ul>
<li> Computing and software management each have at
least two co-leaders, one of whom is from BNL and one
of whom is from JLab.</li>
<li> Computing hardware resources are also envisioned to
be contributed from both of the labs.</li>
<li> GlueX figures prominently in the list of OSG users
from medium-sized collaborations.</li>
<li> CLAS12 used about 5 million core hours during the
month of July, comparable to GlueX usage for the
entire year.</li>
</ul>
<h3><span class="mw-headline"
id="PID_matching_suggestions_based_on_data.2FMC_comparisons">PID
matching suggestions based on data/MC comparisons</span></h3>
<p>Sean led us through the first slide (see below) of <a
rel="nofollow" class="external text"
href="https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4652">his
talk</a> on future areas for data vs. Monte Carlo
comparisons. He will give a complete presentation at
next week's HDGeant4 Meeting.
</p>
<div class="thumb tright">
<div class="thumbinner" style="width:302px;"><a
href="https://halldweb.jlab.org/wiki/index.php/File:Sdobbs_pid_20200908.png"
class="image"><img alt="Sdobbs pid 20200908.png"
src="https://halldweb.jlab.org/wiki/images/thumb/9/9d/Sdobbs_pid_20200908.png/300px-Sdobbs_pid_20200908.png"
class="thumbimage" width="300" height="225"></a> </div>
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<p>From the discussion:
</p>
<ul>
<li> On widening TOF cuts as a function of momentum:
<ul>
<li> Simon reported that there is already a hook to
do this in the PIDFOM system.</li>
<li> Alex reported that there is also a mechanism
available for a momentum-dependent cut when doing
particle identification in the Analysis Library.</li>
</ul>
</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>Thomas brought up a <a rel="nofollow" class="external
text"
href="https://github.com/JeffersonLab/halld_sim/pull/153">recent
pull request to the halld_sim repository</a> from
Alex. This fixes a problem where simulation jobs can go
into an infinite loop if the CCDB does not show any flux
for a corresponding real data run. The change was made
to the beam properties class.
</p>
<h3><span class="mw-headline"
id="New_guidance_for_selecting_version_sets_with_MCwrapper">New
guidance for selecting version sets with MCwrapper</span></h3>
<p>Sean described his new wiki page, <a
href="https://halldweb.jlab.org/wiki/index.php/How_to_choose_software_versions_on_the_MC_submission_form"
title="How to choose software versions on the MC
submission form">How to choose software versions on
the MC submission form</a>. This led to discussion on
related topics.
</p>
<ul>
<li> Shankar asked for advice on how to specify the RCDB
query to be used for a range of runs. Turns out that
each run period has a different query and they are not
called out on the form. This is because the "best"
underlying query to the RCDB is different for each run
period, thus different query aliases are needed for
each instance. This needs better documentation.</li>
</ul>
<h3><span class="mw-headline"
id="Specifying_Simulation_Runs">Specifying Simulation
Runs</span></h3>
<p>Mark D. noted that when filling out the MCwrapper web
form, it is hard to remember the "correct" responses,
those that worked well in a previous project. Thomas
pointed out a feature ("mod=2") where parameters from a
previous project can be copied into a new form, with the
exception of some fields that probably should not be
re-used, such as the output file location.
</p>
<h3><span class="mw-headline"
id="Need_for_a_New_Version_Set">Need for a New Version
Set</span></h3>
<p>Sean and Shankar pointed out that we are due for a new
version set that incorporates recent improvements to
several packages. Mark I. agreed to produce one.
</p>
<h3><span class="mw-headline" id="Action_Item_Review">Action
Item Review</span></h3>
<ol>
<li> Ask the Computer Center about staging the start of
jobs in time.</li>
<li> Make sure that the automatic tests of HDGeant4 pull
requests have been fully implemented.</li>
<li> Create a new version set with the latest
improvements. (Mark I.)</li>
</ol>
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