[Halld-offline] Offline Software Meeting Minutes, April 1, 2015

[Mark Ito]

People,

Please find the minutes below and at

https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_April_1,_2015#Minutes

   -- Mark
___________________________________________


GlueX Offline Meeting, April 1, 2015

Minutes

Present:

  * *CMU*: Curtis Meyer
  * *FSU*: Aristeidis Tsaris
  * *JLab*: Mark Ito (chair), David Lawrence, Paul Mattione, Nathan
    Sparks, Mike Staib, Justin Stevens, Simon Taylor, Beni Zihlmann
  * *MEPhI*: Dmitry Romanov
  * *NU*: Sean Dobbs


Announcements

 1. Mark executed a global search and replace on the wiki:
      * halldweb1 -> halldweb
      * hdops.jlab.org/wiki -> halldweb.jlab.org/hdops/wiki
 2. Version control for CCDB source files is moving from our Subversion
    repository to GitHub. Brad Sawatzky had been helping Dmitry get it
    covered under the JLab contract with GitHub.
 3. Mark has added a node running Red Hat Enterprise 7 to the list of
    those running the nightly builds. It is his desktop machine
    lorentz.jlab.org. Many more warnings are being generated from the
    gcc 4.8 compiler.
 4. Mark threatened to enlist help in getting the b1pi and single-track
    tests to complete successfully, something that has not happened for
    several months.
 5. Sandy Philpott has asked can GlueX use idle cores at JLab?
    <https://mailman.jlab.org/pipermail/halld-offline/2015-March/001993.html>.

      * Mark reported that thousands of Data Challenge 3 jobs have been
        submitted.
      * We will will likely need to do a lot of simulation of 5.5 GeV beam.
      * We had expected to be launching reconstruction jobs by now, back
        when 10 GeV was the plan.
      * Justin pointed out that simulation will be memory limited since
        it must be run single threaded.





Review of the GlueX Offline Meeting, March 18, 2015

We looked over the minutes 
<https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_March_18,_2015#Minutes>. 


GlueX Use of C++11 features and GCC Versions

After consultation among Dmitry, David, Mark, and Richard Jones, it was 
agreed that we would endorse Dmitry using C++11 features for the CCDB, 
but limited to those implemented in GCC 4.4. Dmitry will do the 
modifications necessary for the CCDB build system.
Mark had argued that there are now best-practices-like methods for 
memory management that are facilitated by the new smart pointers.
Whether to use these language features more widely has not been agreed 
on. We would need support from the build system.

Offline Monitoring Report

We looked at Kei Moriya's new Launch Analysis pages 
<https://halldweb.jlab.org/data_monitoring/launch_analysis/>. These are 
now being generated quasi-automatically and will be available for new 
data when it comes.

  * For each launch there are reports of how the jobs performed in terms
    of execution time and memory usage among other statistics.
  * There are sections which graphically compare each launch to previous
    launches in several parameters.
  * The fate of the jobs on each file are cataloged for each launch.


Sean was interested in seeing what difference Mike's timing calibrations 
make for the next launch. Paul remarked that we could launch whenever 
those calibrations are ready. Mike reported that he is already remaking 
REST files using his latest calibrations.

OSG Meeting at Northwestern

Sean reported on the recently held annual Open Science Grid meeting.

  * For the past year the group has been focused in getting ready for
    handling the data from the next LHC run, but now they are turning to
    better support for opportunistic running. GlueX was mentioned
    several times in this context.
  * There is a new focus on tools for small independent researchers to
    allow them to access the grid efficiently. Part of this problem is
    distributing data for files sizes on the GB scale.
  * FNAL has several experiments on the scale of GlueX that are
    interested in using the OSG.
  * OSG user support has been restructured. There is a person dedicated
    to helping smaller groups, in particular consulting about how to
    deploy the groups resources and aiding them in climbing the learning
    curve.
  * There was discussion on the next-generation SRM or SRM replacement.
    The thinking is to do something HTTP-based.
  * There has been interest in deploying temporary grid sites on the
    Amazon cloud. Amazon is issuing grants to groups that are
    interested, especially those that develop tools for others to use.
    The grants are in the form of cloud computing time.


Topics Deferred

 1. GEANT4 conversion
 2. Compute-efficient electromagnetic background inclusion

Retrieved from 
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  * This page was last modified on 2 April 2015, at 19:35.


-- Mark M. Ito, Jefferson Lab, marki at jlab.org, (757)269-5295
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