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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="moz-txt-link-freetext"
href="https://clasweb.jlab.org/wiki/index.php/CLAS12_DSTs">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="moz-txt-link-freetext"
href="https://userweb.jlab.org/%7Egavalian/docs/sphinx/hipo/html/chapters/analysis_train.html#event-filters">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="moz-txt-link-freetext"
href="https://userweb.jlab.org/%7Egavalian/docs/sphinx/hipo/html/chapters/analysis_train.html#event-filters">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 <br>
<br>
<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">Latifa Elouadrhiri wrote:<br>
</div>
<blockquote type="cite"
cite="mid:f19f9cca-3703-8171-8e9c-ece26ba6c417@jlab.org">
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<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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