Remote access to Castor data for data analysis

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Remote access to Castor datafor data analysis

• Kilian Schwarz

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Direct gridftp based access

• grid-proxy-init
• globus-url-copy dbg vb bs 262144 tcp-bs
  2621440 gsiftp//castorgrid03.cern.ch/castor/cern.
  ch/user/p/phristov/trdtest1/751796/genTracks.root
  file////home/kschwarz/test.root
• disadvantage one has to know where the files are
  located
• Currently only on alice.fzk.de or grid5.gsi.de
  (Firewall doors to be opened)

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AliEn2/PROOF

• Still music of the future
• All data have to be migrated to Castor2
• Not all ROOT modifications necessary for AliEn2
  are in CVS so far
• AliRoot analysis class has to be modified so that
  AliEn data sets can be read in correctly
  (P.Hristov has still 2 weeks of holidays)

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AliEn2 PROOF the way it should work ?

• In ROOT/PROOF
• TGridConnect(alienaliendb5.cern.ch,aliprod)
  
• TAlienCollection collection TAlienCollectionQu
  ery(ltcatalogue-pathgt,ltpatterngt for example
  miniesd.root
• ,ltmax entriesgt)
• TDSet analysisdataset collection--gtGetDataset(
  TTree,esdTree)
• gProof-gtProcess(myAnalasis.C)

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AliEn2 GUI (in development)
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AliEn2 GUI
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AliEn2 GUI
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AliEn2 GUI
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AliEn2 GUI
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AliEn2 GUI