Atlas:Analysis ST 2009
29.01.09
FR Cloud ST (2009 plans)
- Weekly ST : 50 jobs per site - all sites involved
LPSC : ready to be tested but only 16 DS available BEIJING : Validation on-going - Available DS on MCDISK 68
- File access comparison : 209-01-29 16:00 UTC
http://gangarobot.cern.ch/st/test_124/ 50 jobs Posix I/O http://gangarobot.cern.ch/st/test_125/ 50 jobs FileStager
- Optimization and Site Stress test: On demand and dedicated to sites which are interrested.
GRIF : GRIFOPN test (as soon as it is available) Total of 1000 jobs will be distributed to ATLAS CEs with following DS available being accessed from LAL, SACLAY and LPNHE - GRIF-SACLAY_MCDISK: 332 - GRIF-LPNHE_MCDISK: 334 - GRIF-LAL_MCDISK: 457 LPC : to be planned when new storage arrays installation and network upgrade done DS available on IN2P3-LPC_MCDISK: 326 LAPP-CPPM : interrested by a stress test ~130 DS available there TOKYO : Input DS available on TOKYO-LCG2_MCDISK: 1000
Input DS available
- Thanks to Stéphane, followong DS available at sites (27/01/09):
{'TOKYO-LCG2_MCDISK': 1038, 'IN2P3-LPC_MCDISK': 342, 'IN2P3-CPPM_MCDISK': 185, 'GRIF-SACLAY_MCDISK': 369, 'GRIF-LPNHE_MCDISK': 380, 'IN2P3-LAPP_MCDISK': 284, 'IN2P3-LPSC_MCDISK': 143, 'GRIF-LAL_MCDISK': 493, 'RO-02-NIPNE_MCDISK': 184, 'BEIJING-LCG2_MCDISK': 129, 'RO-07-NIPNE_MCDISK': 171}
File access modes used by Ganga Jobs
Currently if users are submitting Ganga jobs with the LCG backend, the posix I/O access is the default method to access files (j.inputdata.type='DQ2_LOCAL')
One of the alternative access mode used by ST tests is the FileStager mode, which copies the input files in a background thread of the athena event loop usinglcg-cp from the local SE to the worker node tmp area. (j.inputdata.type='FILE_STAGER') This mode still needs a bit of improvements to gain full stability, but as demonstrated good performance at some (but not all) sites. Two access modes may be used during ST tests.