Try :
TFile * f = TFile::Open("rfio:link.root");
Jochen Schieck a écrit :
> > Hi Jochen,
> >
> > you should try to open such files with TRFIOFile instead of TFile!
> >
> > Regards,
> > Horst
>
> Thanks. I tried it with:
>
> root [0] gSystem->Load("libRFIO");
> root [1] TRFIOFile f1 =
> TRFIOFile("rfio:/castor/cern.ch/user/s/schieck/mc2790_1_111.root");
> Error in <TRFIOFile::TRFIOFile>: file
> /castor/cern.ch/user/s/schieck/mc2790_1_111.root does not exist
>
> and still I cannot see the files in CASTOR directly. If I try to access
> the root file via the link with
>
> root [2] TRFIOFile f1 = TRFIOFile("rfio:link.root");
>
> and start the viewer
>
> root [3] TTree *ntuple1 = f1.Get("h10");
> root [4] ntuple1->StartViewer();
>
> I get again a crash. It still doesn't work.
>
> Jochen
>
> >
> > Jochen Schieck wrote:
> > >
> > > Hello,
> > >
> > > we are trying to acces root files in CASTOR with
> > >
> > > TFile *f1 =
> > > TFile::Open("rfio:/castor/cern.ch/user/s/schieck/mc2790_1_111.root");
> > >
> > > and the system complains with:
> > >
> > > Error in <TRFIOFile::TRFIOFile>: file
> > > /castor/cern.ch/user/s/schieck/mc2790_1_111.root does not exist
> > >
> > > But the file exists as you can see:
> > >
> > > [lxplus044] ~ > rfstat /castor/cern.ch/user/s/schieck/mc2790_1_111.root
> > > Device : 0
> > > Inode number : 4236991
> > > Protection : -rw-r--r-- (100644)
> > > Hard Links : 1
> > > Uid : 19235 (schieck)
> > > Gid : 1135 (ws)
> > > Size (bytes) : 126547074
> > > Last access : Thu Nov 29 12:15:50 2001
> > > Last modify : Thu Nov 29 12:00:40 2001
> > > Last stat. mod. : Thu Nov 29 12:00:40 2001
> > >
> > > We tried a similar thing in PAW with opening a hbook file in CASTOR and it
> > > actually worked!
> > >
> > > We managed to access the file with manual stagein -M and using a symbolic
> > > link. However, if we try to access a tree within the root file via
> > >
> > > TFile *f = TFile::Open("rfio:link.root");
> > > TTree *ntuple = f.Get("h10");
> > > ntuple->StartViewer();
> > >
> > > and try to plot a variable in a TBranch ROOT crashes.
> > >
> > > We use root ver 3.01 from afs
> > >
> > > ROOTSYS=/afs/cern.ch/na49/library.4/ROOT/new/i386_redhat60/root
> > > LD_LIBRARY_PATH=/afs/cern.ch/na49/library.4/ROOT/new/i386_redhat60/root/lib/
> > >
> > > on lxplus.
> > >
> > > Thanks for any help
> > >
> > > Jochen
> > >
> > > ----------------------------------------------------------------------
> > > Jochen Schieck
> > > EMAIL: schieck@mppmu.mpg.de
> > > Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut)
> > > Tel: +49 89 323 54 352
> > > +49 179 54 72 113
> > > Fax: +49 89 322 67 04
> > > Foehringer Ring 6 / Room 245
> > > 80805 Muenchen
> > > ----------------------------------------------------------------------
> >
> > --
> > -----------------------------------------------------------------
> > Dr. Horst Goeringer email: H.Goeringer@gsi.de
> > GSI Computing Center Tel: +49-6159-71-2553
> > Planckstr. 1 Fax: +49-6159-71-2986
> > D-64291 Darmstadt, Germany
> > -----------------------------------------------------------------
> >
--
Yves SCHUTZ (IN2P3 - CNRS) collaboration TAPS/WA98/PHENIX/ALICE
SUBATECH
Ecole des Mines de Nantes Telephone: (+33/0) 2 51 85 84 71
4, rue Alfred Kastler Fax : (+33/0) 2 51 85 84 79
F-44070 Nantes cedex 03 e-mail : yves.schutz@subatech.in2p3.fr
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