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Comment: Migrated to Confluence 4.0

Attendees:  Joanne Bogart, Anders Borgland, Emmanuel Cephas, Jim Chiang, Richard Dubois, Tom Glanzman, Navid Golpayegani, Tony Johnson, Heather Kelly, Chuck Patterson, Leon Rochester, Tracy Usher, Eric Winter

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Jim had sent out a request for reports of python distribution problems.  There was no responsewere just a couple responses, so for now this issue is tabled.  Eric W asked what plans there are to move to python 2.6.  Jim said it is under consideration.  Navid requests that we remain at python 2.5.1 until Red Hat catches up.

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new GlastClassify tag from Leon is available, however, Bill has since spoken to Tracy concerning a discovery about some CAL energy cuts, which when an event fails, some variables are left to their initialized value such as the CTBParticleType variable which is set to zero (which also denotes a gamma).  Tracy wants to move these cuts into the IM XML Analysis so that Bill can set the initialization values as he desires.

Random Overlay

Coming soon to a GR near you... 

Richard mentioned that Philippe came by his office earlier and suggested it would be helpful to have a library of real events to draw from, which we could "overlay" onto an MC event.  This may help study pile-up issues.  Currently we are able to overlay noise, but the concept of overlaying an additional digi event from a ROOT file onto an event is new.  This would certainly require some tweaks to RootIo and as Leon mentioned, some modification to TkrRecon where it gives preferential treatment to the highest hits, which in this case, may not be what you want.

Workbook

Chuck has updated the FRED documentation online to provide a better description of how to use the event display.  In attempting to install FRED on a new windows box, Chuck ran into some terrible problems.  It turns out the issue stemmed from using the current release on Ruby (1.8.6).  When Chuck down-graded to 1.8.2, suddenly FRED functioned again.  There are other reports on Linux, where users need to use 1.8.6 versus some older versions of Ruby.  This makes it rather difficult to document how to get FRED installed.  Chuck requests that we consider providing Ruby ourselves, to insure users grab the correct version.  This is straightforward on Windows - it is not so clear what version of Ruby we should distribute for Linux.

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Tony and Heather need to provide the ability for Gleam to start up Wired just as we currently do for FRED. 

Addendum - Other Computing Issues

  • ownership of TriggerAlg
    • Martin will cede stewardship shortly. There will be a meeting of interested parties on Tuesday (July 15).
  • recon seems very slow!
    • Tom & Warren are seeing 2.5-3 Hz when reconstructing data runs. Ground muons used to be ~15 Hz. What's up?
  • need to keep track of disk resources
    • L1Proc seems to be munching xrootd disk at 2-3x the budgeted rate. Probably will recoup the "extra" when we purge superseded L1Proc file versions.
    • We need to develop tools to keep an eye on xrootd and Oracle space used.
  • Access to Data
    • we should turn off ftp-glast access to u31 and u33. We will be asking the same of data transferred away from SLAC.