GlueX Offline Meeting, April 6, 2010
Minutes

     * IU: Mihajlo Kornicer, Ryan Mitchell, Matt Shepherd
     * JLab: Mark Ito (chair), David Lawrence, Lubomir Pentchev, Elton
       Smith, Sascha Somov, Simon Taylor, Elliott Wolin, Beni Zihlmann


Announcements

    1. New src release, [33]sim-recon-2010-03-29: Mark mentioned that this
       was the first release using the new sim-recon structure and the
       first using JANA 0.6.1. No problems have been reported thus far.
    2. "RedHat 5.3" link to "CentOS" for JLab builds: Mark reported that
       this has been done for existing releases. It still needs to be
       automated.
    3. New [34]HOWTO add private code to a DANA application: Mark and
       David wrote one. See the [35]email announcement. During discussion
       we identified two new HOWTO's that we would like to see:
         1. HOWTO enable multiple threads: David will write this one.
         2. HOWTO write thread-safe code: Elliott suggested this; he will
            help David write one.
    4. JANA 0.6.1 required for new code: David warned us that due to
       check-in's done this week, JANA 0.6.1 is required to build the
       latest version of sim-recon.
    5. Make system fixed to re-make on include file changes: In trying to
       fix another feature, Mark broke this basic function of the depends
       files. He has fixed it now. It had been broken for several months.


Review of Minutes from the Last Meeting

   [37]They were reviewed; no notable comments were offered.

Filtering events from bggen

   This was a [39]recent thread on the offline mailing list. Will Levine
   was "looking for a way to filter out all events of a specific final
   state from bggen/pythia output." He got several responses from several
   collaborators describing various methods. David remarked, and we all
   agreed, that this was an example of successful communication within the
   group.

BCAL Reconstruction

   David gave us a succinct outline of the reconstruction algorithm we
   have been using for the BCAL including a historical time-line of its
   genesis at KLOE and GlueX-based development, along with relevant
   references. This paralleled the presentation by Mihajlo at the last
   meeting on FCAL reconstruction. See [41]his slides for details.

DANA-to-EVIO conversion

   Elliott presented his recent efforts, in collaboration with David, on a
   plug-in that serializes a selection of DANA objects in EVIO format. The
   selection only reflects current state of development; more classes can
   be added. The latest version allows output of DANA associated objects
   (more specifically, the associations themselves). See [43]his slides
   for details.

   In the discussion, Mark remarked at the recent development seems to be
   evolving toward an HDDM-like feature set and if so he wondered why not
   just use HDDM, to conserve manpower. Elliott stated that it makes sense
   in the context of the online to keep things in the realm of EVIO, and
   output of the level 3 farm, which would be generated from DANA objects,
   would therefore need to be expressed in EVIO.

Action Item Review

   We went over [45]the list. Some items need to be marked as done. Some
   of us were reminded of things we have to do.

   We had a short discussion of tracking action items in an issue-tracking
   software system rather than on a wiki page. The time has probably come
   to do this.

FCAL reconstruction update

   We did not have time to get to this item. Mihajlo will present this
   material at the next Physics Meeting.

New Action Items

    1. Automate links from CentOS5 to RHEL5, 64-bit. -> Mark
    2. HOWTO enable multiple threads-> David
    3. HOWTO write thread-safe code-> Elliott, David
    4. Explore action item tracking software. -> Mark

   Retrieved from
   "http://www.jlab.org/Hall-D/software/wiki/index.php/GlueX_Offline_Meeting%2C_April_6%2C_2010"

References

  33. https://halldsvn.jlab.org/repos/tags/sim-recon-2010-03-29/RELEASE
  34. http://www.jlab.org/Hall-D/software/wiki/index.php/HOWTO_add_private_code_to_a_DANA_application
  35. https://mailman.jlab.org/pipermail/halld-offline/2010-April/000240.html
  37. http://www.jlab.org/Hall-D/software/wiki/index.php/GlueX_Offline_Meeting%2C_March_23%2C_2010#Minutes
  39. https://mailman.jlab.org/pipermail/halld-offline/2010-March/000220.html
  41. http://www.jlab.org/Hall-D/software/wiki/images/2/26/20100406_bcal_recon.pdf
  43. http://www.jlab.org/Hall-D/software/wiki/images/4/45/2010-Apr-6-offline_DANAEVIO_Update.pptx
  45. http://www.jlab.org/Hall-D/software/wiki/index.php/Action_Items_From_Hall_D_Offline_Meetings