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<h1 id="firstHeading" class="firstHeading" style="font-weight:
bold;" lang="en"><span dir="auto">GlueX Offline Meeting,
January 6, 2016</span><br>
</h1>
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lang="en">
<h2 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Minutes">Minutes</span></h2>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Present:</p>
<ul style="list-style-type: square;">
<li><b>CMU</b>: Curtis Meyer</li>
<li><b>FIU</b>: Mahmoud Kamel</li>
<li><b>JLab</b>: Amber Boehnlein, Eugene Chudakov, Mark
Ito (chair), David Lawrence, Paul Mattione, Dmitry
Romanov, Nathan Sparks, Simon Taylor, Beni Zihlmann</li>
<li><b>NU</b>: Sean Dobbs</li>
<li><b>UConn</b>: James McIntyre</li>
</ul>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Announcements">Announcements</span></h3>
<ul style="list-style-type: square;">
<li><a rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/halld-offline/2015-December/002188.html"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">New sim-recon release: 1.8.0</a>.
It came out on December 11. I uses the latest versions
of JANA and CCDB.</li>
<li><a rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/halld-offline/2016-January/002192.html"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">ifarm1101 out of the
rotation</a>. This was the last of the CentOS 6.2
ifarm nodes. Logins have been disabled.</li>
</ul>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id="Review_of_minutes_from_December_9">Review of<span
class="Apple-converted-space"> </span><a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_December_9,_2015#Minutes"
title="GlueX Offline Meeting, December 9, 2015"
style="color: rgb(85, 34, 0); padding: 0px !important;
text-decoration: underline; background: transparent;">minutes
from December 9</a></span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Sean raised the issue of deleting old
pull-request builds last time. Mark implemented
auto-deletion of builds older than a month via cron job.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="HEP_Software_Foundation">HEP
Software Foundation</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Amber gave a summary of an effort to
collect information and encourage collaboration on
software systems among high-energy and nuclear physics
collaborations. The approach is community-based. See<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://halldweb.jlab.org/talks/2016/SciCompNews.pptx"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">her slides</a><span
class="Apple-converted-space"> </span>for details. The
Foundation has a website at<a rel="nofollow"
class="external free"
href="http://hepsoftwarefoundation.org/" style="color:
inherit !important; padding: 0px !important;
text-decoration: inherit !important; background:
transparent;">http://hepsoftwarefoundation.org/</a><span
class="Apple-converted-space"> </span>. The "knowledge
base" is hosted at<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external free"
href="http://hepsoftware.org/" style="color: inherit
!important; padding: 0px !important; text-decoration:
inherit !important; background: transparent;"><a class="moz-txt-link-freetext" href="http://hepsoftware.org/">http://hepsoftware.org/</a></a><span
class="Apple-converted-space"> </span>and Amber has
already added GlueX. More links are planned.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">She highlighted the Packaging Working
Group, which is collecting information on systems for
software distribution within collaborations. She
encouraged interested parties to subscribe to the mailing
list, <a class="moz-txt-link-abbreviated" href="mailto:hep-sf-packaging-wg@googlegroups.com">hep-sf-packaging-wg@googlegroups.com</a> .</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">She also told us about Exascale-2015,
a project aiming at a machine of hundreds of petaflops.
There will be a workshop this summer to discuss nuclear
physics applications including experimental tasks.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Offline_Monitoring">Offline
Monitoring</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Paul gave the report. He showed us
results from the most recent launches, just before the
holidays. He did a launch on Spring 15 and Fall 15 data
sets. He pointed us to the<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://halldweb.jlab.org/cgi-bin/data_monitoring/monitoring/runBrowser.py?run_number=4319&ver=ver01&period=RunPeriod-2015-12"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">Run Browser, Run 4319</a><span
class="Apple-converted-space"> </span>as an example. One
can clearly pi zeros in the BCAL.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">The transition from the old offline
monitoring database to the RCDB is in progress. Some info
in the browser is compromised as a result. Dmitry pointed
out some of the features of the RCDB data viewer at<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external free"
href="https://halldweb.jlab.org/rcdb" style="color:
inherit !important; padding: 0px !important;
text-decoration: inherit !important; background:
transparent;">https://halldweb.jlab.org/rcdb</a><span
class="Apple-converted-space"> </span>.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Geant4_Update">Geant4 Update</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">David has succeeded in build a new
version of the CPP simulation using Geant 4.10.2 and Clang
3.7.0. He reports that the problem with multi-threaded
processing he had seen with previous Geant versions has
been fixed. Event rate scales with number of threads. He
sees some small differences between multi-threaded enabled
code run with one thread versus single-threaded code.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">He has added a new generator to
sim-recon. It produces muon pairs with a coherent photon
beam, including polarization effects. The pair productions
code was adopted from Geant4 and the coherent photon
generator adopted from Richard Jones's code.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id="Upgrade_Xerces_C.2B.2B_from_3.1.1_to_3.1.2">Upgrade
Xerces C++ from 3.1.1 to 3.1.2</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Version 3.1.2 of the Xerces C++
library<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://xerces.apache.org/xerces-c/releases_plan.html"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">came out last March</a>. Mark
flashed the<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=10510&version=12315014"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">release notes</a>. Mark has
built it on all of he platforms and tested it on RHEL7
with the b1pi test suite. Nathan has been using this
version for his work for months now. We will upgrade to
this version in the near future.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">More generally, we had a discussion
on how to handle future version upgrades for the low-level
software packages that we rely on. Upgrades can be
disruptive since they force everyone to build a new
version of the package itself and recompile all packages
that depend on it.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">During the discussion we spent some
time on the plan for going from GCC 4.4 to 4.8. GCC 4.4 is
the default on RHEL/CentOS 6, which appears to be common
throughout the collaboration. The latest Geant4 and ROOT6
both require 4.8 at least.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Curtis suggested we poll the
collaboration about which compilers people are using at
their home institutions.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">As far as implementing a change,
David suggested making decisions at Offline meetings,
issuing an announcement in advance of any change giving
people time to object.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Review_of_recent_pull_requests">Review
of<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/sim-recon/pulls?q=is%3Aopen+is%3Apr"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">recent pull requests</a></span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">We skimmed through the list going
back to early December.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Data_Challenge_3"><a
href="https://halldweb.jlab.org/wiki/index.php/Data_Challenge_3"
title="Data Challenge 3" style="color: rgb(85, 34, 0);
padding: 0px !important; text-decoration: underline;
background: transparent;">Data Challenge 3</a></span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Mark has generated the fake raw data
using recent software, 5000 files of 10 GB each. This was
done just before the break.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id="Future_Commissioning_Simulations"><a
href="https://halldweb.jlab.org/wiki/index.php/Sim1_Conditions"
title="Sim1 Conditions" style="color: rgb(85, 34, 0);
padding: 0px !important; text-decoration: underline;
background: transparent;">Future Commissioning
Simulations</a></span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Mark generated a hundred jobs using
Tegan's new BCAL code at Sean's request. Sean will look
over the results.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="New_HDPM_Documentation">New HDPM
Documentation</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Nathan has transitioned to using the
GitHub built-in wiki for Hall D Package Manager
documentation. Find it at<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external free"
href="https://github.com/JeffersonLab/hdpm/wiki"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">https://github.com/JeffersonLab/hdpm/wiki</a><span
class="Apple-converted-space"> </span>.</p>
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