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Please find the minutes below and at <a class="moz-txt-link-freetext" href="http://tinyurl.com/hjvnnko">http://tinyurl.com/hjvnnko</a> ,<br>
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<h1 id="firstHeading" class="firstHeading" style="font-weight:
bold;" lang="en"><span dir="auto">GlueX Offline Meeting, March
30, 2016</span>, Minutes</h1>
<div id="bodyContent" class="mw-body-content"><span
class="mw-headline" id="Minutes"></span>
<div id="mw-content-text" dir="ltr" class="mw-content-ltr"
lang="en">
<table>
<tbody>
<tr>
<td>There is a<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://bluejeans.com/s/9n7o/" 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>: Mike Staib</li>
<li><b>FIU</b>: Mahmoud Kamel</li>
<li><b>FSU</b>: Brad Cannon</li>
<li><b>JLab</b>: Alex Barnes, Mark Ito (chair),
David Lawrence, Paul Mattione, Sandy Philpott,
Dmitry Romanov, Nathan Sparks, Justin Stevens,
Simon Taylor</li>
<li><b>NU</b>: Sean Dobbs</li>
</ul>
</td>
<td>
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1.4em 0.8em 0px; float: left; clear: left;
background-color: transparent;">
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rgb(204, 204, 204); font-size: 15.04px;
text-align: center; overflow: hidden; padding:
3px !important; width: 202px; background-color:
white;"><a
href="https://halldweb.jlab.org/wiki/index.php/File:Offline_2016-03-30.png"
class="image" style="color: rgb(85, 34, 0);
padding: 0px !important; text-decoration:
underline; background: transparent;"><img
alt=""
src="cid:part2.08030604.00000002@jlab.org"
class="thumbimage"
srcset="/wiki/images/thumb/4/42/Offline_2016-03-30.png/300px-Offline_2016-03-30.png
1.5x,
/wiki/images/thumb/4/42/Offline_2016-03-30.png/400px-Offline_2016-03-30.png
2x" style="page-break-inside: avoid; border:
1px solid rgb(204, 204, 204);
vertical-align: middle;" height="71"
width="200"></a>
<div class="thumbcaption" style="border: none;
text-align: left; line-height: 1.4em;
font-size: 14.1376px; padding: 3px
!important;">Software Meeting</div>
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</td>
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</tbody>
</table>
<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://github.com/JeffersonLab/sim-recon/releases/tag/1.10.0"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">sim-recon version 1.10.0 was
released</a><span class="Apple-converted-space"> </span>on
March 8.</li>
<li><a rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/jlab-scicomp-briefs/2016q1/000121.html"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">Change to Farm Priority
Scheme</a>. The "exclusive" queue is now a thing of
the past. Exclusive use of a node is still available by
requesting the requisite number of cores in the Auger
request. The change was made on March 10.</li>
</ol>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Review_of_minutes_from_March_2">Review
of<span class="Apple-converted-space"> </span><a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_March_2,_2016#Minutes"
title="GlueX Offline Meeting, March 2, 2016"
style="color: rgb(85, 34, 0); padding: 0px !important;
text-decoration: underline; background: transparent;">minutes
from March 2</a></span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">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 source code repository</a><span
class="Apple-converted-space"> </span>has migrated to
GitHub. The Subversion repository is no longer the
authoritative source of the code. Previously, only the
wiki for the GitHub repository was being used.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Reconstruction_Scaling"><a
rel="nofollow" class="external text"
href="http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=2984"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">Reconstruction Scaling</a></span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Paul presented slides on his study of
the multi-thread scaling behavior of the offline jobs. He
looked at two cases: the loaded-with-32-plugin offline
monitoring jobs and a 2-plugin-rest-producing jobs. Each
case was tried with a range of threads. Clear memory
saving is seen with multiple threads. Scaling is generally
good, but the curves turn over when then number of threads
gets comparable to the number of cores, especially with
the histogram-heavy offline monitoring jobs.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Please see<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=2984"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">his slides</a><span
class="Apple-converted-space"> </span>for details and
plots.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id="Calibration_Challenge.2FProcessing">Calibration
Challenge/Processing</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Sean described his experience with
the March 18 Calibration Train Journey. For the final
pass, he is creating raw data skims for calibration
purposes. For this pass he sees a sweet spot at eight
threads. For details, please see<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://halldweb.jlab.org/wiki/images/f/f8/Sdobbs_OfflineMtg_30Mar16.pdf"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">his slides</a>.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="NSB_not_quite_zero">NSB not
quite zero</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Mike described the "feature" of the
F250 firmware whereby a requested value of the number of
samples before the pulse (NSB) of zero was not accepted.
Instead a value of one is used. This was causing an error
in the pedestal subtraction; the number of samples was
always one more than expected. The change is explained in<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://mailman.jlab.org/pipermail/halld-cal/2016-March/001241.html"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">his recent email</a><span
class="Apple-converted-space"> </span>to the Calibration
Group.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">A pull request will be submitted
soon.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">The configuration files have been
changed to request NSB = 1, a request that the firmware
will honor.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="CCDB_Improvements">CCDB
Improvements</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Dmitry previewed changes coming with
version 1.07 of the CCDB. See<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://docs.google.com/presentation/d/1wk7SYDhmOdZM0smBDGda4QeonT90Q4SWlhD-7ZA0pME/edit?usp=sharing"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">his slides</a><span
class="Apple-converted-space"> </span>for all of the
details.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">There was some discussion of a new
scheme that allows a one-to-many relation between
calibration constants (the one) to run number assignments
(the many). In other words, one set of calibration
constants can be applied to different run ranges; the
constants themselves need not be duplicated in the
database. The advantage of this feature is that the
equivalence of constants for one run range with those of
another can be tested by comparing the constant set
references without h having to compare the constants
themselves. This feature also simplifies copying constants
from one range to another; one simply copies the
reference. This idea was described in the original design
document of the CCDB.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id="Future_Trends_in_Nuclear_Physics_Computing_Workshop">Future
Trends in Nuclear Physics Computing Workshop</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">We reviewed the<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://www.jlab.org/conferences/trends2016/program.html"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">agenda</a><span
class="Apple-converted-space"> </span>from the workshop
held two weeks ago. David gave a talk; Mark appeared on a
panel.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">There was a discussion with Amber and
Frank Wuerthwein of the OSG on exploring JLab enhancing
our facility with the use of OSG resources. This will be
pursued initially through the GlueX VO with Richard, our
contact person.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id="Access_to_Fairshare_Information_from_JLab_Farm">Access
to Fairshare Information from JLab Farm</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">We agreed to ask SciComp for access
to the priority information that heretofore has only been
available from occasional emails.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="HDPM_Update">HDPM Update</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Nathan described the latest. See<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://halldweb.jlab.org/talks/2016/hdpm_03-30-16.pdf"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">his slides</a><span
class="Apple-converted-space"> </span>for the details.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">His second slide on recent changes:</p>
<ol>
<li>Setup file can be sourced from any directory</li>
<li>Use hdpm commands from any directory</li>
<li>Option added for passing subdirectory of sim-recon to
"build" command</li>
<li>Added "hdpm run" command</li>
</ol>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">The last item allows users to run an
arbitrary command in a target environment set-up by HDPM.</p>
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