GlueX Offline Meeting, September 19, 2012

GlueX Offline Software Meeting
Wednesday, September 19, 2012
1:30 pm EDT
JLab: CEBAF Center, F326/327

Agenda

1. Announcements
2. Review of minutes from the last meeting: all
3. Report from Data Challenge Meeting
4. Reconstruction sub-group reports
   1. Calorimeters
   2. Tracking
   3. PID
5. Scan-Build Analyzer: David
   • scan-build (e-mail announcement)
   • CPPCheck
6. Truth information in Monte Carlo events: Richard
   • proposed revision with separated truth and hits info
7. Action Item Review
   • Recently Resolved
   • Outstanding Items
8. Review of recent repository activity: all

Communication Information

Video Conferencing

• ESNet: 8542553
• EVO:
  • Direct Meeting Link
  • Phone Bridge ID: 13 0949

Slides

Talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2012-3Q on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2012-3Q/ .

Minutes

Present:

JLab: David L. (chair), Elliott W., Dmitry R.

UConn: Richard J.

CMU: Curtis M., Paul M., Will L.

IU: Matt S.

Announcement

None.

Review of Minutes from Previous Meeting

As we reviewed the previous meeting's minutes, we took a moment to refresh our memories on the status of CCDB deployment. Dmitry reported that he has run reconstruction using both CCDB and the files from subversion. The results were (nearly) identical. He also reported that Mark has produced a script that can generate a CCDB compatible SQLite file. Some HOWTO documentation is forthcoming so others can start beta-testing the CCDB. It should be available by the collaboration meeting.

Truth on Monte Carlo Events

Richard gave a report on truth information that is embedded in the Monte Carlo events. This has come up as an issue since he has been working on the data file size issue as part of the Data Challenge effort. He showed some examples where truth information (i.e. information only available in simulation and not available in real data) was placed into attributes of the HDDM XML specification making it difficult to strip from a file. He proposed using subtags instead that could hold the truth information while maintaining an easily identifiable association with a "hit". He showed an example and it was generally agreed that this would be a better approach. There was some concern expressed that the subtags could lead to more complex reconstruction code using the C-interface. Richard pointed out that the C++ interface makes the access as simple for the attribute style as the subtag style.

A proposed, new HDDM for Hall-D was shown. Richard requested that responsible persons for each subsystem look it over and verify that the information contained in the sections relevant to that subsystem are appropriate. Since there are several changes, these will require several changes to the JANA HDDM interface. It may well motivate a re-write using only the C++ interface of HDDM. This will probably not happen before the collaboration meeting.

Data Challenge

There was some brief discussion on the Data Challenge activities. The main consensus was that the efforts seem to be progressing along nicely, thanks much to Mark's efforts at JLab on using the farm and others efforts to work on the data file format (REST).