-- HuangQiulan - 2010-01-28

To run examples on the PROOF cluster

Three examples on PROOF

Test_simple

Run an analysis filling 20 histos with 1000 gaussian random numbers. Without any input data.

  su - proof
  cd test
  cd test_simple
  root
    *******************************************
  *                                         *
  *        W E L C O M E  to  R O O T       *
  *                                         *
  *   Version   5.26/00  14 December 2009   *
  *                                         *
  *  You are welcome to visit our Web site  *
  *          http://root.cern.ch            *
  *                                         *
  *******************************************

ROOT 5.26/00 (trunk@31882, Dec 14 2009, 20:18:36 on linuxx8664gcc)

CINT/ROOT C/C++ Interpreter version 5.17.00, Dec 21, 2008
Type ? for help. Commands must be C++ statements.
Enclose multiple statements between { }.
root [0] .x run_simple.C+

Test_h1

This runs the 'famous' H1 analysis. The data are read from three forms:

the HTTP server at root.cern.ch

Sharing file system like NFS and AFS

XROOTD

LUSTRE

// Create the chain
   TChain *chain = new TChain("h42");
   //chain->Add("http://root.cern.ch/files/h1/dstarmb.root");
   //chain->Add("http://root.cern.ch/files/h1/dstarp1a.root");
   //chain->Add("http://root.cern.ch/files/h1/dstarp1b.root");
   //chain->Add("http://root.cern.ch/files/h1/dstarp2.root");

   /* Run the proof with the files from xrootd*/
   //chain->Add("root://prfserver01.ihep.ac.cn//xrootd/test/FS_test/dstarmb.root");
   //chain->Add("root://prfserver01.ihep.ac.cn//xrootd/test/FS_test/dstarp1a.root");
   //chain->Add("root://prfserver01.ihep.ac.cn//xrootd/test/FS_test/dstarp1b.root");
   //chain->Add("root://prfserver01.ihep.ac.cn//xrootd/test/FS_test/dstarp2.root");

   /*Run the proof with the files from NFS*/
   //chain->Add("file:/pool/huangql/proof/rootfile/dstarmb.root");
   //chain->Add("file:/pool/huangql/proof/rootfile/dstarp1a.root");
   //chain->Add("file:/pool/huangql/proof/rootfile/dstarp1b.root");
   //chain->Add("file:/pool/huangql/proof/rootfile/dstarp2.root");

   /*Run the proof with files from lustre*/
   chain->Add("file:/lustre/proof/rootfile/dstarmb.root");
   chain->Add("file:/lustre/proof/rootfile/dstarp1a.root");
   chain->Add("file:/lustre/proof/rootfile/dstarp1b.root");
   chain->Add("file:/lustre/proof/rootfile/dstarp2.root");

We can run the test to get the result for each data source and analysis the performance of different input filesystem for PROOF. You may get the detail analysis from Performance.