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<p>Folks,</p>
<p>Please find the notes below and at</p>
<p>
<a class="moz-txt-link-freetext" href="https://halldweb.jlab.org/wiki/index.php/GlueX_Containers_Meeting,_April_13,_2018">https://halldweb.jlab.org/wiki/index.php/GlueX_Containers_Meeting,_April_13,_2018</a>
.</p>
<p> -- Mark</p>
<p>_______________</p>
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<h2 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">GlueX Containers Meeting, April 13, 2018, </span><span
class="mw-headline" id="Notes">Notes</span></h2>
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lang="en">
<p>Present: Richard Jones, Mark Ito, Thomas Britton, Sean
Dobbs, Zisis Papandreou
</p>
<ul>
<li> At Sean's suggestion, Mark wrote a <a
href="https://halldweb.jlab.org/wiki/index.php/HOWTO_use_the_GlueX_Singularity_Container"
title="HOWTO use the GlueX Singularity Container">HOWTO</a>
on...well...how to use the current GlueX Singularity
container to access recent builds of the software
without having to do the build.
<ul>
<li> The current version <b>assumes</b> no CVMFS
partition on the local node, despite this being
the recommended method of accessing the
software...patience y'all!</li>
<li> Mark will note that the location of
"/group/halld" on Oasis is
/cvmfs/oasis.opensciencegrid.org/gluex/group/halld
in a future version of the HOWTO.</li>
</ul>
</li>
<li> There are two versions of the container at present:
<ol>
<li> for when CVMFS is present (i. e.,
/cvmfs/singularity.opensciencegrid.org/markito3/gluex_docker_devel:latest)</li>
<li> for when CVMFS is not there</li>
</ol>
<ul>
<li> This was only necessary because we have been
invoking OSG jobs in the mode where the user is
automatically placed in the container. If we
invoke the container by hand, the bind option can
be controlled and two containers are no longer
necessary. Mark and Thomas will work on this.</li>
</ul>
</li>
<li> Mark has started looking at XROOTD
<ul>
<li> building from source directly from a clone of
the GitHub repository</li>
<li> documentation on main site is a bit obtuse;
pointers to beginner-level docs appreciated</li>
</ul>
</li>
<li> The MC Thomas generated last week on the OSG using
the GlueX Singularity container has been used to <a
rel="nofollow" class="external text"
href="https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=3583">demonstrate
that the rate dependence of reconstruction
efficiency seen in the simulation roughly matches
that seen in the data</a>.</li>
<li> Thomas is gearing up to start a major bggen
campaign on the OSG.
<ul>
<li> Requested by the MIT group for their B boson
analysis.</li>
<li> Statistics to match 50% of the golden period of
2016.</li>
<li> Will ship random triggers along with each job
using the Condor mechanism. If this proves to be a
bottleneck, we can explore using Richard's XROOTD
servers at UConn for this purpose.</li>
<li> Richard noted that statistics on the project
would be interesting, e. g. the number of OSG CPU
hours consumed per unit time as a function of
time.</li>
</ul>
</li>
<li> Action items:
<ol>
<li> cvmfs bind instructions</li>
<li> go to self-serve singularity launch on OSG</li>
<li> fix issue on ifarm with singularity</li>
</ol>
</li>
</ul>
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