<div dir="ltr">Dear Eugene<div><br></div><div>Note that the trains are scheduled to run on a regular basis. Nevertheless, the earlier the better.</div><div><br></div><div>Best regards</div><div>FX</div></div><br><div class="gmail_quote"><div dir="ltr">On Wed, Aug 1, 2018 at 10:38 PM Eugene Pasyuk <<a href="mailto:pasyuk@jlab.org">pasyuk@jlab.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div dir="auto">Raffaella, <br><br></div>
<div dir="auto">Any definite date we need to come up with the train requests? <br><br></div>
<div dir="auto">-Eugene</div>
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<b>From:</b> Raffaella De Vita <u></u><br>
<b>Sent:</b> Wed Aug 01 22:16:50 EDT 2018<br>
<b>To:</b> <a href="mailto:clas12_first_exp@jlab.org" target="_blank">clas12_first_exp@jlab.org</a><br>
<b>Subject:</b> [Clas12_first_exp] Analysis trains and skims<br>
<u></u></div>
<br>
Dear All,
<br> here is more information about the status of analysis trains and about the feedback that would be useful to have from collaborators to start more accurate tests.
<br>
<br> Gagik has released the first version of the analysis train software.
<br> - Analysis trains are conceived to do "event selection": they use DSTs as input, i.e. cooked files with all events but only the banks that are relevant for the analysis (see Nathan's documentation at
<a class="m_-4860235607472215035moz-txt-link-freetext" href="https://clasweb.jlab.org/wiki/index.php/CLAS12_DSTs" target="_blank">https://clasweb.jlab.org/wiki/index.php/CLAS12_DSTs</a>), and for now to output skims for different event topologies with the same hipo format and the same banks of the input files.
<br> - Different skims, defined based on user requests, make the train "wagons". After collecting user requests for wagons, trains will be run centrally by a single chef, to optimize the efficiency of the skimming process and avoid I/O problems that are expected to arise with several people trying to access large DST volumes simultaneously.
<br> - Skim conditions can be defined based on the number and type of final state particles as explained in Gagik's documentation at
<a class="m_-4860235607472215035moz-txt-link-freetext" href="https://userweb.jlab.org/%7Egavalian/docs/sphinx/hipo/html/chapters/analysis_train.html#event-filters" target="_blank">https://userweb.jlab.org/~gavalian/docs/sphinx/hipo/html/chapters/analysis_train.html#event-filters</a>.
<br>
<br> To define the first trains and start testing the overall process, we would like to ask collaborators to come up with requests for final state topologies for their favorite reactions:
<br> - check the instructions at
<a class="m_-4860235607472215035moz-txt-link-freetext" href="https://userweb.jlab.org/%7Egavalian/docs/sphinx/hipo/html/chapters/analysis_train.html#event-filters" target="_blank">https://userweb.jlab.org/~gavalian/docs/sphinx/hipo/html/chapters/analysis_train.html#event-filters</a> and send us your "wagon" definition;
<br> - keep in mind that, for a skim to be useful, it should correspond to a small fraction of the input data; you can estimate the reduction factor of your proposed skimming condition using the sample DSTs available in /work/clas12/clas12/data/calib/dst_5bp6p1/; the overall train output size (sum of all skims that will be collected) should be less than 50% of the input DST;
<br> - once requests will be collected and reviewed to remove possible duplications, a train will be assembled and tests will begin.
<br>
<br> Best regards,
<br> Raffaella
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<div class="m_-4860235607472215035moz-cite-prefix">
Latifa Elouadrhiri wrote:
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<blockquote type="cite">
<p>Dear all,</p>
<p>The meeting this morning is cancelled.</p>
<p>The meeting agenda for next week will focus on the following:</p>
<p><b>Spring Run</b></p>
<ul>
<li>Status of the data processing<br> </li>
<li>Analysis trains for each one of the major analysis group: please send me the requested filtering so far I have the one from SIDIS (Harut) and From Nucleon Structure (Ralf).</li>
</ul>
<p><b>Fall Run</b><br> </p>
<ul>
<li>We will review where we are in term of tracking efficiency based on the latest release and make decision on the luminosity for the upcoming run</li>
<li>List of run coordinators <br> </li>
<li>Run plan</li>
</ul>
<p>Best regards,</p>
<p>Latifa<br> </p>
<p><br> </p>
<br>
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