Remote access to Castor data for data analysis Kilian Schwarz

Direct gridftp based access grid-proxy-init globus-url-copy –dbg –vb –bs –tcp-bs gsiftp://castorgrid03.cern.ch/castor/cern.ch/user/ p/phristov/trdtest1/751796/genTracks.root file:////home/kschwarz/test.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)

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)

AliEn2 + PROOF the way it should work In ROOT/PROOF  TGrid::Connect(“alien:aliendb5.cern.ch”,”aliprod” )  TAlienCollection* collection = TAlienCollection:Query(“ ”,” ” for example “*miniesd.root”, );  TDSet * analysisdataset = collection-- >GetDataset(“TTree”,”esdTree”);  gProof->Process(“myAnalasis.C”)

AliEn2 GUI (in development)

AliEn2 GUI