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<p>Colleagues,</p>
<p>Please find the minutes below and <a moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_September_18,_2018">here</a>.</p>
<p> -- Mark</p>
<p>__________________________________</p>
<p>
</p>
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<h2 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">Minutes, GlueX Offline Meeting, September 18,
2018</span></h2>
<div id="bodyContent" class="mw-body-content">Present:
<div id="mw-content-text" dir="ltr" class="mw-content-ltr"
lang="en">
<ul>
<li> <b> CMU: </b> Naomi Jarvis, Curtis Meyer</li>
<li> <b> FSU: </b> Sean Dobbs</li>
<li> <b> JLab: </b> Alex Austregesilo, Thomas Britton,
Mark Ito (chair), Justin Stevens, Beni Zihlmann</li>
<li> <b> MIT: </b> Cristiano Fanelli</li>
<li> <b> Raleigh, NC: </b> David Lawrence</li>
<li> <b> Yerevan: </b> Hrach Marukyan</li>
</ul>
<p>There is a <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/GoPvv/">recording of
this meeting</a> on the BlueJeans site. Use your JLab
credentials to access it.
</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/2018-September/003355.html">New
releases: AmpTools 0.9.4, halld_sim 3.4.0, MCwrapper
2.0.1</a>. The linked email has links to the release
notes for each package.
<ul>
<li> AmpTools 0.9.4: Support for weighted events</li>
<li> halld_sim 3.4.0: Gets parameters for drift
time-to-distance relationship from the CCDB.</li>
<li> MCwrapper 2.0.1: Uses generator binary names
consistent with their containing directories.
<ul>
<li> This version has a problem with the bggen
bash script. See Thomas if you are having
difficulties.</li>
</ul>
</li>
</ul>
</li>
<li> <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/build_scripts/releases/tag/1.39">New
version of build_scripts: version 1.39</a>: Fixes
build of cernlib to find lapack and blas libraries and
successfully create the PAW binary.</li>
<li> Status of Launches.
<ul>
<li> Alex reports that the reconstruction launch
over 2017 data is 100% complete. It took 30 days
to complete. There was no tape I/O bottleneck this
time. Up to 1000 jobs were running on the farm
simultaneously. Extrapolating, the Spring 2018
data should take 90 days to reconstruct if
resources are similar.</li>
<li> A quick analysis launch was done for Lubomir.</li>
<li> A complete analysis launch with <a
rel="nofollow" class="external text"
href="https://halldweb.jlab.org/wiki-private/index.php/Spring_2017_Analysis_Launch#Version19">60
reactions</a> was also done on the 2017 data[?].
<a rel="nofollow" class="external text"
href="https://halldweb.jlab.org/data_monitoring/analysis/summary_swif_output_analysis_2017-01_ver19_batch01.html">It
took only 20 hours to complete</a>.</li>
<li> A problem came up during the merging of the
output. The merge jobs seem to place a high load
on the work disk server, so much that other users
are pushed out and do not get decent service. This
same activity did not cause any problems with the
Lustre disks. Alex is working with Dave Rackley of
SciComp to track down the problem. </li>
</ul>
</li>
</ol>
<h3><span class="mw-headline"
id="Review_of_minutes_from_the_September_4_meeting">Review
of minutes from the September 4 meeting</span></h3>
<p>We went over <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_September_4,_2018#Minutes"
title="GlueX Offline Meeting, September 4, 2018">the
minutes</a>.
</p>
<ul>
<li> There are still issues with two pull requests
mentioned last time:
<ol>
<li> <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/halld_recon/pull/8">Fix
event order dependence, #8</a></li>
<li> <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/halld_recon/pull/9">Warn
if JANA_CALIB_CONTEXT not set, #9</a></li>
</ol>
</li>
<li> Mark encouraged us, once again, to implement <a
rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/build_scripts/wiki/gluex_env_boot_jlab.%28c%29sh">the
new gxenv and gxclean commands</a> when setting up
our shells.</li>
<li> Thomas and Maria Patsyuk have resolved her problem
with the particle gun with appropriate setting of
TGTWIDTH in control.in.</li>
</ul>
<h3><span class="mw-headline"
id="Review_of_the_HDGeant4_Meeting_from_September_11">Review
of the HDGeant4 Meeting from September 11</span></h3>
<p>We went over <a
href="https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meeting,_September_11,_2018#Minutes"
title="HDGeant4 Meeting, September 11, 2018">the
minutes</a>.
</p>
<p>On the problem with forward protons at high momentum (<a
rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/HDGeant4/issues/66">Issue
#66</a>), Beni reports that we sees hits from the
downstream FDC chambers missing on tracks both in HDG3
and HDG4 at the wire-based stage, but in the HDG3 case
those hits are recovered during time-based tracking. In
HDG4, the hits remain lost. He is investigating why this
is the case.
</p>
<p>Thomas reminded us that the simulations we are studying
were done with all physics processes turned off.
</p>
<p>Beni also occasionally sees events where there are no
FDC hits altogether in HDG4[?], neither simulated nor
"truth", when scanning events with hdview2. Justin
reported seeing similar pseudo-point multiplicity
distributions when comparing 3 vs. 4. These observations
seem to be in tension with each other.
</p>
<h3><span class="mw-headline"
id="Software_Items_on_the_Collaboration_Meeting_Agenda">Software
Items on the Collaboration Meeting Agenda</span></h3>
<p>We looked at <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX-Collaboration-Sep-2018#Saturday_September_29.2C_2018_.28CC-L102.29"
title="GlueX-Collaboration-Sep-2018">the agenda</a>
put together by Sean. Looks good!
</p>
<h3><span class="mw-headline" id="NERSC_Update">NERSC
Update</span></h3>
<p>David gave us an update. For plots see the recording
starting at 51:00.
</p>
<p>Since his last report, David completed the monitoring
launch at NERSC. He ran 5000 jobs and it took 12 days.
</p>
<p>Since then he did a bandwidth test where he used Globus
Online to transfer 3 complete runs, over 200 files per
run, out to NERSC, outside of the SWIF2 framework. He
saw transfer speeds matching the advertised bandwidth of
the Lab's link, with peaks at 10 Gb/s (and sometimes a
bit more).
</p>
<p>After the files were transferred, jobs were submitted
against them (about 700 jobs). These took over 5 days to
complete and there where slack period where no jobs were
running for up to a day.
</p>
<h3><span class="mw-headline"
id="Computing_and_Software_Review">Computing and
Software Review</span></h3>
<p>Mark reviewed the materials we have received so far on
the review to be held November 27 and 28.
</p>
<ul>
<li> <a rel="nofollow" class="external text"
href="https://halldweb.jlab.org/talks/2018/rolf_computing_review.pdf">Email
from Rolf</a></li>
<li> <a rel="nofollow" class="external text"
href="https://halldweb.jlab.org/talks/2018/12_GeV_Experimental_Computing_Review_Committee_Charge_v0-7.docx">Charge</a></li>
<li> <a rel="nofollow" class="external text"
href="https://halldweb.jlab.org/talks/2018/12GeV_Software_Review_2018_agenda_v1.docx">Agenda</a></li>
</ul>
<h3><span class="mw-headline"
id="Review_of_recent_pull_requests">Review of recent
pull requests</span></h3>
<ul>
<li> <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/halld_recon/pulls?q=is%3Aclosed+is%3Apr">halld_recon</a></li>
<li> <a rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/halld_sim/pulls?q=is%3Aclosed+is%3Apr">halld_sim</a></li>
</ul>
<p>Alex mentioned that he has seen crashes with the latest
version of halld_recon when he tries to reconstruct a
full run. Many of the jobs crash.
</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 went over <a rel="nofollow" class="external text"
href="https://groups.google.com/forum/#%21forum/gluex-software">the
list</a> without a lot of comment.
</p>
<h3><span class="mw-headline" id="Action_Item_Review">Action
Item Review</span></h3>
<ol>
<li> Fix the work disk.</li>
<li> Find the reason for track loss in HDG4.
<ul>
<li> Find the timing problem.</li>
<li> Understand the events with no FDC hits.</li>
</ul>
</li>
<li> Release a new version of gluex_MCwrapper with the
bggen bash script fixed.</li>
<li> Find out the schedule for getting more cache disk
from SciComp.</li>
</ol>
</div>
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<li id="lastmod"> This page was last modified on 19 September
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<pre class="moz-signature" cols="72">--
Mark Ito, <a class="moz-txt-link-abbreviated" href="mailto:marki@jlab.org">marki@jlab.org</a>, (757)269-5295
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