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grid:storegrid

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grid:storegrid [2009/07/29 16:13] – abuechlegrid:storegrid [2009/07/29 16:23] (current) – abuechle
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-====== Storing Data on a Grid Storage Element ======+====== Storing Data on a Grid Storage Element (SE) ======
 ===== Introduction ===== ===== Introduction =====
 When running a job on the Grid (backend = Dirac()), the output data can be stored on a Grid Storage Element (SE) instead of the lxplus AFS account. The access to the files is however a bit different than on lxplus. When running a job on the Grid (backend = Dirac()), the output data can be stored on a Grid Storage Element (SE) instead of the lxplus AFS account. The access to the files is however a bit different than on lxplus.
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 go to your home directory on lxplus go to your home directory on lxplus
 open the .gangarc file open the .gangarc file
-modify the following line (line 313 in standard .gangarc file (to get a standard one do 'ganga -g')) :  +modify the following line (line 313 in standard .gangarc file (to get a standard one do 'ganga -g')):  
-<code> +<code>
 #outputsandbox_types = ['NTupleSvc', 'HistogramPersistencySvc', 'MicroDSTStream'] #outputsandbox_types = ['NTupleSvc', 'HistogramPersistencySvc', 'MicroDSTStream']
 </code>  </code> 
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 </code> </code>
  
-===== Where are the output files (on which SE)? ===== +
-in Ganga when the job has completed do: +
-<code> +
-jobs(jobnumber).subjobs(subjobnumber).backend.getOutputData() +
-</code> +
-that gives you a logical filename (LFN): +
-<code> +
-['/lhcb/user/myInitial/myUsername/diracSlice/DiracJobID/filename.root'] +
-</code> +
-The data will end up in the SE closest to the location where your job did run.\\  +
-To find out on which SE your file actually is, execute the following commands on lxplus: +
-<code> +
-SetupProject Dirac +
-dirac-dms-lfn-replicas /lhcb/user/myInitial/myUsername/diracSlice/DiracJobID/filename.root +
-</code> +
-there you get back for instance the following: +
-<code> +
-2009-07-29 12:10:41 UTC dirac-dms-lfn-replicas.py/DiracAPI  INFO: Replica Lookup Time: 96.89 seconds +
-{'Failed': {}, +
- 'Successful': {'/lhcb/user/a/abuechle/4125/4125675/bsKK_23July09.root': {'RAL-USER': 'srm://srm-lhcb.gridpp.rl.ac.uk/castor/ads.rl.ac.uk/prod/lhcb/user/a/abuechle/4125/4125675/bsKK_23July09.root'}}} +
-</code> +
-so the file is on RAL at at the srm address: 'srm://srm-lhcb.gridpp.rl.ac.uk/castor/ads.rl.ac.uk/prod/lhcb/user/a/abuechle/4125/4125675/bsKK_23July09.root'.+
  
grid/storegrid.1248876785.txt.gz · Last modified: by abuechle

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