Reading Writing ROOT files to Storage Element - jniedzie/SVJanalysis_wiki GitHub Wiki
Do not forget to activate your gird certificate with:
voms-proxy-init --rfc --voms cms -valid 192:00
On the PSI T3 hosts (e.g. t3ui02), ROOT files MUST be written to the T3 Storage Element via:
xrdcp <file_name.root> root://t3dcachedb03.psi.ch//pnfs/psi.ch/cms/trivcat/store/user/<username>/<path>
If you do not do like this, you won't be able to access your files from outside the T3 hosts!
Note the two // before pnfs. One would be enough for the command line to work. But this is needed to be consistent with the usual format of path with redirectors.
On other hosts (e.g. lxplus, login-el7.uscms.org), ROOT files MUST be written to the T3 Storage Element via:
xrdcp <file_name.root> root://t3se01.psi.ch:1094//store/user/<username>/<path>
where <path> must be replaced by the path to a directory where the file will be copied, or by the path to a file name.
On any host, any file can be accessed via:
root://t3se01.psi.ch:1094//store/user/<username>/<path_to_file.root>
and any file can be copied locally via:
xrdcp root://t3se01.psi.ch:1094//store/user/<username>/<path_to_file.root> .
With XRootD:
xrdcp <file_name.root> root://storage01.lcg.cscs.ch:1096//pnfs/lcg.cscs.ch/cms/trivcat/store/user/<username>/<path>
xrdcp root://storage01.lcg.cscs.ch:1096//pnfs/lcg.cscs.ch/cms/trivcat/store/user/<username>/<path_to_file_name.root> .
With GFAL:
gfal-copy <file_name.root> srm://storage01.lcg.cscs.ch:8443/srm/managerv2?SFN=/pnfs/lcg.cscs.ch/cms/trivcat/store/user/<username>/<path>
gfal-copy root://storage01.lcg.cscs.ch:1096//pnfs/lcg.cscs.ch/cms/trivcat/store/user/<username>/<path_to_file_name.root> .
- In case the destination already exists, and you want to replace the file, use
xrdcp -forgfal-copy -f - You can check if a file exists using
xdrfs root://t3se01.psi.ch:1094/ ls /store/user/<username>/<path_to_file.root> xdrfs root://storage01.lcg.cscs.ch:1096/ ls /pnfs/lcg.cscs.ch/cms/trivcat/store/user/<username>/<path_to_file.root>