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Folks,<br>
<br>
Please find the minutes reproduced below and at
<a class="moz-txt-link-freetext" href="https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_March_2,_2016">https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_March_2,_2016</a>
.<br>
<br>
-- Mark<br>
__________________________________________<br>
<br>
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<h1 id="firstHeading" class="firstHeading" style="font-weight:
bold;" lang="en"><span dir="auto">GlueX Offline Meeting, March
2, 2016, </span><span class="mw-headline" id="Minutes">Minutes</span></h1>
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<tbody>
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<td>There is a<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://bluejeans.com/s/9dy1/" style="color:
inherit !important; padding: 0px !important;
text-decoration: inherit !important; background:
transparent;">recording of this meeting</a><span
class="Apple-converted-space"> </span>on the
BlueJeans site.
<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>: Naomi Jarvis, Curtis Meyer</li>
<li><b>FIU</b>: Mahmoud Kamel</li>
<li><b>FSU</b>: Brad Cannon</li>
<li><b>JLab</b>: Sergey Furletov, Mark Ito
(chair), Paul Mattione, Dmitry Romanov, Nathan
Sparks</li>
<li><b>NU</b>: Sean Dobbs</li>
<li><b>UConn</b>: Richard Jones</li>
</ul>
</td>
<td>
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style="color: rgb(85, 34, 0); padding: 0px
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background: transparent;"><img alt=""
src="cid:part2.09050602.09040206@jlab.org"
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<div class="thumbcaption" style="border: none;
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!important;">Software Meeting</div>
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<h3 style="page-break-after: avoid; font-weight: bold;"><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/2016-February/002223.html"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">Deleting legacy builds</a>.
They were backed up and deleted.</li>
<li><a rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/jlab-scicomp-briefs/2016q1/000120.html"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">Lustre upgrade</a>. The
upgrade had to be abandoned for now. SciComp will
continue to study the upgrade path.</li>
<li>Software Help Forum delayed. Mark had a concern about
whether we should be mixing scientific paper discussions
and software questions and answers on the same site.
Computer and Network Infrastructure (CNI) is putting
together a Drupal-based forum for us to test drive.</li>
<li>Paper Review Status. The requested materials have been
submitted to Graham Heyes:
<ol>
<li>Responses to recommendations to past software
reviews.</li>
<li>Progress in GlueX software since the last review
(Feb. 2015)</li>
<li>A revised computing resource need estimate.
<ul style="list-style-type: square;">
<li>Mark and Graham are still going back and forth
on the spreadsheet format.</li>
</ul>
</li>
</ol>
</li>
<li><a
href="https://halldweb.jlab.org/wiki/index.php/SWIF_Analysis_Jobs"
title="SWIF Analysis Jobs" style="color: rgb(85, 34,
0); padding: 0px !important; text-decoration:
underline; background: transparent;">SWIF Analysis
Jobs</a>. Paul put together a wiki page on how to get
started with the Scientific Workflow Indefatigable
Factotum (SWIF). He provides a simple set of scripts.
The system is oriented toward using REST data to do
physics analysis.
<ul style="list-style-type: square;">
<li>Dmitry mentioned that he is interested in a system
that starts from data in the RCDB and generates a
template for batch analysis of chosen files. He will
talk to Paul about whether Paul's system might help
with this.</li>
</ul>
</li>
</ol>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id="Review_of_minutes_from_February_3">Review of<span
class="Apple-converted-space"> </span><a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_February_3,_2016#Minutes"
title="GlueX Offline Meeting, February 3, 2016"
style="color: rgb(85, 34, 0); padding: 0px !important;
text-decoration: underline; background: transparent;">minutes
from February 3</a></span></h3>
<ul style="list-style-type: square;">
<li>Mark commented that many users are taking advantage of
the one-node/multi-thread job queue that Scientific
Computing (SciComp) has put up recently.</li>
<li>Dmitry reminded us that the best way to make requests
for bug fixes or new features is to create an issue on
the<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/rcdb"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">RCDB GitHub site</a>. That
way it will not get lost in the email shuffle.
<ul style="list-style-type: square;">
<li>Note that the RCDB code is still being kept in our
Subversion repository. Migration of the code to
GitHub will not occur until after the current run.</li>
</ul>
</li>
</ul>
<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 pointed out some features of the<span
class="Apple-converted-space"> </span><a
href="https://halldweb.jlab.org/wiki/index.php/Data_Monitoring_Procedures#Procedures:_Overview"
title="Data Monitoring Procedures" style="color: rgb(85,
34, 0); padding: 0px !important; text-decoration:
underline; background: transparent;">Monitoring Plan</a>.
He commented on the three steps during experimental
running:</p>
<ol>
<li>Incoming. This is underway on all new data as it hits
the tape library.</li>
<li>Monitoring Launches. He is waiting on calibration
constants from the Calibration Train to show up before
starting.</li>
<li>Initial Reconstruction Launch. We are not there yet.</li>
</ol>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">We decided not to wait for the
ultimate constants from calibration and go ahead and start
a Monitoring Launch on Friday, after Sean has done some
touch-up to the timing constants. Also since there is not
a lot of data yet, that launch could go ahead and process
all of the data collected so far, effectively making it an
preliminary Initial Reconstruction Launch.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Mahmoud mentioned that the monitoring
plugin for the Start Counter is not seeing any TDC hits.
He and Paul will get together to track down the problem.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id="Calibration_Challenge.2FProcessing"><a
rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/halld-offline/2016-March/002257.html"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">Calibration
Challenge/Processing</a></span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Sean described details of the the
newly initiated calibration passes on recently taken data.
See<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://halldweb.jlab.org/wiki/images/0/02/Sdobbs_OfflineMtg_2Mar16.pdf"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">his two slides</a><span
class="Apple-converted-space"> </span>for all of the
bullets. In addition to the calibration steps, he
discussed doing π<sup>0</sup><span
class="Apple-converted-space"> </span>skims and a couple
of items left to do.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">The last of the to-do items prompted
a discussion on how we should feedback our experience with
farm performance to SciComp and what metrics should be
included in that feedback. We decided to discuss this next
week after we see how the weekend's launch goes.</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;">Richard has been busy with diamond
production lately, a good thing for all of us, and will
return to work on Geant4 when the run is over.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id="C.2B.2B_version_upgrade_discussion">C++ version
upgrade discussion</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">After lengthy discussion we settled
on June 1, 2016 as the date for sim-recon conversion to
GCC 4.9. See the<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://bluejeans.com/s/9dy1/" style="color:
inherit !important; padding: 0px !important;
text-decoration: inherit !important; background:
transparent;">recording</a><span
class="Apple-converted-space"> </span>for details. More
precisely, after that date code that relies on language
features present in that version of GCC will be accepted
on the sim-recon master branch. When this happens
collaborators will be required to upgrade their compilers
if they have not done so.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Nathan agreed to write a wiki page to
describe the<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://www.softwarecollections.org/en/scls/rhscl/devtoolset-3/"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">Software Collections</a><span
class="Apple-converted-space"> </span>system that allows
installation of binaries for recent versions of GCC (among
other things) for RedHat and CentOS systems. This has the
potential to greatly simplify the compiler upgrade process
and subsequent environmental set-up.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Photon_beam_polarization">Photon
beam polarization</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Curtis called our attention to a<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=2968"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">recent note from Ken
Livingston</a><span class="Apple-converted-space"> </span>where
Ken gave his thoughts on how polarization information
should be recorded and how that information should be used
in data analysis. We agreed that this was required reading
for those who would like to contribute to the discussion
going forward.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Despite this admonition, we launched
into a discussion of dealing with shifts of the location
of the coherent edge during a run (i. e., beyond the
photon energy dependence of the polarization for a fixed
coherent edge position). This lead to whether it should be
done by event ranges in the CCDB, which would require
significant CCDB development, or fixed table of event
dependent parameters, one table per run which could itself
be kept in the CCDB.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Mark pointed out that the need for
this approach has not been demonstrated. Richard thought
that it was likely that a thin diamond would not be
stable. Mark conceded that in the end we would need event
ranges in the CCDB, if not to handle this problem, then
for others that might arise. That feature, however, will
not be there tomorrow.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">In the end we agreed that the first
step is to assess the need, and if something has to be
done, we will do it.</p>
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