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- Log onto a SLAC Linux machine (e.g., noric)
- Identify files needed for skim operation, e.g., browse the data catalog
- Create a text file with the list of file names (e.g., filelist.txt)
- Edit the filelist.txt file as described illustrated in the Examples below
- Locate yourself in a directory with sufficient space to hold the expected output
- Create/customize a script to run the skimmer (templates provided below)
- Run the skimmer
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| Code Block |
|---|
/nfs/farm/g/glast/u18/skimmerTest/ |
Example 1 - Create an event list based on a merit TCut, then extract digi/recon events (subdir /treeCut)
Given this script and this filelist, the following files result:
| Code Block |
|---|
$ ./treeCut.csh [lots of output...] $ ls -l -rw-rw-r-- 1 dragon glast-pipeline 727 Jun 24 14:00 newfilelist.txt -rw-rw-r-- 1 dragon glast-pipeline 881 Jun 24 14:00 libraryList.txt -rw-rw-r-- 1 dragon glast-pipeline 15666 Jun 24 14:00 v14r4-BranchList.txt -rw-rw-r-- 1 dragon glast-pipeline 1787 Jun 24 14:00 eventList.txt -rw-r--r-- 1 dragon glast-pipeline 122406 Jun 24 14:00 L1PROC-skim_merit.root -rw-r--r-- 1 dragon glast-pipeline 873903 Jun 24 14:00 L1PROC-skim_recon.root -rw-r--r-- 1 dragon glast-pipeline 182663 Jun 24 14:00 L1PROC-skim_digi.root |
These root files contain 119 events.
Example 2 - Extract digi/recon events from a provided event list (subdir /treeEvtList)
Given this script, this filelist and this eventlist, the following files result:
| Code Block |
|---|
$ ./treeEvtList.csh
[lots of output...]
$ ls -l
-rw-rw-r-- 1 dragon glast-pipeline 727 Jun 24 14:04 newfilelist.txt
-rw-rw-r-- 1 dragon glast-pipeline 881 Jun 24 14:04 libraryList.txt
-rw-rw-r-- 1 dragon glast-pipeline 15666 Jun 24 14:04 v14r4-BranchList.txt
-rw-r--r-- 1 dragon glast-pipeline 51023 Jun 24 14:04 L1PROC-skim_merit.root
-rw-r--r-- 1 dragon glast-pipeline 194381 Jun 24 14:04 L1PROC-skim_recon.root
-rw-r--r-- 1 dragon glast-pipeline 123064 Jun 24 14:04 L1PROC-skim_digi.root
|
These root files contain 21 events.
Reference information
- Skimmer User's Guide
- The skimmer code is in CVS, package name = DataServer
- At SLAC the skimmer code is located in this directory
Code Block /afs/slac/g/glast/ground/DataServer/ - You might also be interested in the Data Access FAQ
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