P106 Reprocessing

status: Complete
last update: 30 June 2010

This page is a record of the configuration for the P106 reprocessing project. It targets 200 runs of L&EO data for processing with a new alignment calibration and other improvements to investigate issues with the Pass7 classification.

The name "P106" derives from the word "processing" and the initial file version to be used for the output data products, e.g., r0123456789_v106_merit.root.

• P106-LEO-MERIT - this task reads DIGI, runs the full reconstruction code in Gleam and produces reprocessed RECON + MERIT + CAL + GCR + FT1

Datafile names, versions and locations

Data file version numbers for this reprocessing will begin with v106.

XROOT location and file naming

Location template:

/glast/Data/Flight/Reprocess/<reprocessName>/<dataType>

Locations for P106-LEO:

/glast/Data/Flight/Reprocess/P106-LEO/merit

And so forth for the other file types produced.

File naming:

Example:

/glast/Data/Flight/Reprocess/P106-LEO/merit/r0239557414_v106_merit.root
/glast/Data/Flight/Reprocess/P106-LEO/ft1/gll_ph_r0239559565_v106.fit

DataCatalog location and naming

Logical directory and group template:

Data/Flight/Reprocess/<reprocessName>:<dataType>

Note that the <dataType> field (following the colon) is a DataCatalog 'group' name.

Logical directories for P106-LEO:

Data/Flight/Reprocess/P106-LEO:MERIT
Data/Flight/Reprocess/P106-LEO:FT1

And so forth...

In the DataCatalog, all file names are of the form r<run#>.

Naming examples:

Data/Flight/Reprocess/P106-LEO:MERIT r0239557414
Data/Flight/Reprocess/P106-LEO:FT1 r0239557414

Data Sample

The currently defined data sample for P110 and P110-LEO reprocessing includes:

Note that the L&EO data represent a discontiguous set of runs.

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Bookkeeping

1. (This page): Define ingredients of reprocessing (processing code/configuration changes)
2. Processing History database: http://glast-ground.slac.stanford.edu/HistoryProcessing/HProcessingRuns.jsp?processingname=P106-LEO
   1. List of all reprocessings
   2. List of all data runs reprocessed
   3. Pointers to all input data files (-> dataCatalog)
   4. Pointers to associated task processes (-> Pipeline II status)
3. Data Catalog database: http://glast-ground.slac.stanford.edu/DataCatalog/folder.jsp
   1. Lists of and pointers to all output data files
   2. Meta data associated with each output data product

P106-LEO-MERIT

Status chronology

• 29 June 2010 task continues with little impact on xroot/nfs servers (at least as ganglia is concerned). But wait. The processClump step ran without undue stress on xroot, but the mergeClumps was not so lucky. Both of the newest wains (60,61), which are 12-CPU machines, both got overloaded and lost contact with the world, as shown in the Ganglia plot.
  
  By 21:00 task complete.
• 28 June 2010 14:15 - begin full task...slowly
• 27 June 2010 - update task with new calibration flavor, add back in 200th run, and fire off test stream (4)
• 13 May 2010 - four test streams submitted...formally successful. Anders has given cursory glance at first few events of first stream (recon/merit only) and the log file, saying all looks okay. However, it has been discovered that the alignment issue thought to be an issue with the L&EO data is a non-issue. So put this task ON HOLD.
• 11 May 2010 - Prepare task

Configuration

The configuration for this reprocessing is nearly the same as for the ordinary science data with three exceptions: the run list was provided by Anders (and consists of a discontiguous set of runs); fewer data products are produced; and, the algorithm for finding FT2 files was modified to accommodate these earlier data (in fact, Warren produced a new set of 1-second FT2 files specifically for this reprocessing project). Note that the original list of runs counted 200, but a single run proved troublesome, 238781852, and was removed from the list, leaving 199 runs to reprocess.

CalCalibSvc.FlavorAsym = "calAsym_test"; \\
CalibDataSvc.CalibFlavorList = {"vanilla","calAsym_test"};

Other configurations.

Time

processClump (~23k evts) - about ~45 CPU min (hequ), and ~65 CPU min on fell

mergeClumps (full run) - about 62 CPU min (hequ), mostly due to gtdiffrsp

All 200 runs were fully reprocessed within 30 hours elapsed time. A longer task will not necessarily scale from these numbers, as this elapsed time includes all phases of the task: ramp-up, steady-state, xroot troubles, ramp-down, clean-up. In addition, for the first part of this reprocessing the heavy-lifting jobs were run in the long batch queue which at the time had a per user limit of 1000 jobs (this has subsequently been changed to 'no limit'). The latter part of the task was run in the xlong queue which had no per user limit - but a global limit of 3000 jobs.

Space

(excerpted from the dataCatalog)

Total xroot disk space (exclusive of /glast/Scratch) occupied by this task = 8.3 TB