[Halld-offline] Minutes, Offline Software Meeting, August 8, 2012

[Mark M. Ito]

Folks,

Find the minutes below and at

https://halldweb1.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_August_8,_2012#Minutes

   -- Mark
_____

GlueX Offline Meeting, August 8, 2012
Minutes

    Present:
      * CMU: Will Levine, Paul Mattione, Curtis Meyer
      * IU: Ryan Mitchell
      * JLab: Mark Ito (chair), David Lawrence, Elliott Wolin

Announcements

      * Dmitry Romanov is back at JLab. He will be here for the next six
        months.
      * Mark put out a new release: [27]sim-recon-2012-07-26.
      * We will look into upgrading some of our support packages including
        Xerces-c, ROOT, and Jana.
      * Curtis reminded us of the recent build errors. Mark will
        investigate.
      * Mark reminded us to fill out the [28]Scientific Computing Survey!
      * Elliott announced that next week we will upgrade our MySQL server.
        This will cause a short interruption of access to the wiki. Related
        to this we discussed having multiple servers to avoid outages of
        critical applications, and what their purposes should be.
        Discussion will continue.
      * Mark announced that, in fact, we do have a new MySQL server,
        hallddb1.jlab.org. It will sit outside the firewall, network-wise.
        It will be used to serve out the CCDB and will be available
        read-only both inside and outside JLab.
      * Elliott told us the the Online Group is working on the raw data
        tape. David Abbott has provided some documentation on the
        API-to-come to support the writing of raw fake data. The initial
        version will produce data with one event per block (no
        entanglement).
      * Related to this, David has started work on code to do the EVIO to
        DANA conversion for the low-level raw data.

Review of minutes from last meeting

    We reviewed the [29]minutes from the July 25 meeting.

    David continues to work on the detailed digitization scheme. He has
    committed a new data model, with hooks for this effort. He found an
    issue with the energy dependence of the energy resolution which he
    traced to a threshold problem with the ADC data. He fixed this by
    allowing different thresholds for the TDC data and ADC data. The data
    model needs to accommodate two time measurements as well, one from
    each.

Report from Data Challenge Meeting

    Mark reviewed the [30]minutes from the July 30 meeting for us.

Kinematic Fitting

    Paul has finished writing the new kinematic fitter. It does 4-momentum
    conservation with results identical to the old fitter. It has not been
    tested on long decay chains and timing has yet to be incorporated.

REST

    Paul has been using the REST format to do analysis for strangeness in
    the the context of the PID upgrade. The results are not identical to
    those from analysis without using the format, but close. For example he
    sees 2% more events passing PID cuts with REST. He has been writing a
    bunch of code for analysis; he hopes to have an update ready for the
    next Physics Meeting.

New Action Items

     1. Upgrading some of our support packages including xerces-c, ROOT,
        and Jana. -> David, Mark
     2. Discuss multiple database servers, and what their purposes should
        be.

    Retrieved from
"https://halldweb1.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_August_8,_2012"

References

   27. https://halldsvn.jlab.org/repos/tags/sim-recon-2012-07-26/RELEASE
   28. 
https://halldweb1.jlab.org/wiki/index.php/Private:Scientific_Computing_Survey,_2012
   29. 
https://halldweb1.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_July_25,_2012#Minutes
   30. 
https://halldweb1.jlab.org/wiki/index.php/GlueX_Data_Challenge_Meeting,_July_30,_2012#Minutes

-- 
Mark M. Ito
Jefferson Lab (www.jlab.org)
(757)269-5295