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Task #9792
closed
Execution elapse time when querying HPSS metadata
Start date:
04/29/2015
Due date:
% Done:
0%
Estimated time:
Updated by Chambon Bernard almost 10 years ago
- Status changed from New to Resolved
- Writing piece of code to get execution time when querying HPSS metadata
- Here are some values measured from java side calling getFileProperties(filename) (JNI call, filling map, object creation and so on) :
count of files 1000 2000 5000 10k 20k duration (s) 7 13 35 70 145
- Here are some values measured from C side, time mesurement limited to hpss_FileGetXAttributes(...) call (loop with the same filename)
count of loops 1000 2000 5000 10k 20k duration (s) 6 12 27 54 -
- Here are some values measured from java side calling getFileProperties(filename) (JNI call, filling map, object creation and so on) :
- Conclusion
- Main elapse time consumption comes from HPSS API !
- Nothing to expect to improve execution speed by code, unless managing a cache !
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