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Firstly, you need to obtain a membership in the ilc Virtual Organization (VO), which is sponsored by DESY. This is a VO on the LCG grid. Alternately, you can become a member of the calice VO, but this will only work if your institution is actually a member of this collaboration.
Follow the workflow at https://grid-voms.desy.de:8443/vovoms/ilc/register/vomrsstart.action which will require several rounds of confirmations and emails.
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Setup
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The rest of the tutorial assumes that you are running from an lxplus node at CERN and using the bash shell. |
This script will command can be used to setup the LCG grid tools at CERNenvironment using tools on the DESY AFS file system.
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source /afs/cerndesy.chde/group/projectgrid/gdUI/LCGGLITE-sharepro/current/etc/profile.d/grid_env.sh |
There is also exists a script on DESY afssetup script maintained at CERN.
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source /afs/desycern.dech/groupproject/gridgd/UI/GLITE-proLCG-share/current/etc/profile.d/grid_env.sh |
The DESY afs script seems to work the best. ( I am having trouble running EDG commands with the CERN setup script.)
VOMS Server
At the beginning of each session, a proxy certificate needs to be obtained.
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The ilc VOMS information can be downloaded from http://grid.desy.de/etc/vomses/ilc-grid-voms.desy.de. The contents of this file should be added to the list of VOMS configuration data kept in ~/.glite/vomses. Alternately, the site's administrator your system administrator can install the ilc VO information into a central config file.
The following commands will download the VOMS file and add the information to the user config file in the home directory.
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cd ~ mkdir .glite # only needed if .glite does not exist already-p ~/.glite/vomses cd ~/.glite/vomses wget http://grid.desy.de/etc/vomses/ilc-grid-voms.desy.de # fetch the VOMS file touch vomses # make sure this file exists cat ilc-grid-voms.desy.de >> vomses # add the ILC VOMS information |
Now, the voms-proxy-init command should work correctly.
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Now, the voms-proxy-init command should work correctly.
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voms-proxy-init -verify -debug -voms ilc
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LCG File System
In order to use the LCG file system, the LFC_HOST variable must be setup.
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export LFC_HOST=`lcg-infosites --vo ilc lfc`
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List files on the mass storage system at DESY.
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lfc-ls -l /grid
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Put a file into DESY mass storage.
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echo "test" > /tmp/test_file
lcg-cr -v --vo ilc -l lfn:/grid/ilc/test/test_file file:/tmp/test_file -d srm-dcache.desy.de
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Copy a file from mass storage to local disk.
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lcg-cp -v --vo calice lfn:/grid/ilc/test/test_file file:/tmp/test_file
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Copying one of the Standard Model background files from a local NFS disk to the DESY dcache system and registering into the grid catalog.
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> . /afs/desy.de/group/grid/UI/GLITE/etc/profile.d/grid-env.sh
> export LFC_HOST=grid-lfc.desy.de
> voms-proxy-init -debug -verify -voms ilc
> lcg-cr -v --vo ilc -n 10 file:/nfs/slac/g/lcd/ilc_data/ILC500/StandardModel/250fb-1_-80e-_+30e+_polarization-003.stdhep
-l /grid/ilc/mc/ILC500/SM250fb-1/generated/250fb-1_-80e-_+30e+_polarization-003.stdhep
-d srm://srm-dcache.desy.de/pnfs/desy.de/ilc/mc/ILC500/SM250fb-1/generated/250fb-1_-80e-_+30e+_polarization-003.stdhep
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Listing the available SM files
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lfc-ls -l /grid/ilc/mc/ILC500/SM250fb-1/generated/
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Fetching a Grid LCIO File to SLAC from DESY mass storage
Here is a more advanced script showing how to fetch a file to SLAC, assuming that you have an lxplus account at CERN.
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# ssh to cern
ssh lxplus
# setup grid tools
source /afs/cern.ch/project/gd/LCG-share/current/etc/profile.d/grid_env.sh
# start a grid session
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No Format |
voms-proxy-init -verify -debug -voms ilc # copy the file to temp location on lxplus (it's fast) lcg-cp -v --vo ilc lfn:/grid/ilc/mc-2008/simulated/LDC01_05Sc/ZPole/M-6-5p2_ZPoleuds_LDC01_05Sc_LCP_Test_ZPole_0001.slcio file:/tmp//M-6-5p2_ZPoleuds_LDC01_05Sc_LCP_Test_ZPole_0001.slcio # copy file to slac (slow...go get some coffee) scp M-6-5p2_ZPoleuds_LDC01_05Sc_LCP_Test_ZPole_0001.slcio jeremym@iris01.slac.stanford.edu:/afs/slac/g/lcd/public_data/ILC/test/mokka/ |
The user name jeremym should be replaced above with your real SLAC account name.
Test Commands
The GLITE UI will be used to run test jobs. It uses commands starting with "edg-" for job submission, monitoring, etc.
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edg-job-get-output -i test.jid |
Running SLIC
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Simple Shell Script
Create a shell script slic.sh.
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- Downloads a tarball with the slic binary and untars it.
- Downloads a detector XML file.
- Prints the environment.
- Runs one event (single muon) on the detector file.
- Prints a list of LCIO files created.
Shell Script Using DESY Mass Storage
Here is another version of the script that uses grid commands to fetch a stdhep file and upload the output LCIO file using DESY mass storage. (This example would only work if you have been granted access to DESY mass storage.)
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#!/bin/sh
printenv
wget http://www.lcsim.org/dist/slic/slic_v2r3p0_geant4_v9r0_i686_linux-gnu.tar.gz
tar xzf ./slic_v2r3p0_geant4_v9r0_i686_linux-gnu.tar.gz
wget http://www.lcsim.org/detectors/acme0605/acme0605.lcdd
lcg-cp -v --vo ilc lfn:/grid/ilc/test/test.stdhep file:`pwd`/test.stdhep
./SimDist/scripts/slic.sh -g ./acme0605.lcdd -i ./test.stdhep -r 1
ls -la
lcg-cr -v --vo ilc -l lfn:/grid/ilc/test/outfile.slcio file:`pwd`/outfile.slcio -d srm-dcache.desy.de
lfc-ls -l /grid/ilc/test/outfile.slcio
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JDL File
Now make a file slic.jdl.
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Executable = "slic.sh"; StdOutput = "out"; StdError = "err"; InputSandbox = {"slic.sh"}; OutputSandbox = {"out","err","outfile.slcio"}; |
The OutputSandbox contains a list of files that will be cached for retrieval later, including the output LCIO file.
Job Submission, Monitoring, and Output Retrieval
To run the SLIC test job.
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edg-job-status -i slic.jdljid |
Retrieve the output. By, default the job output will go into a directory in /tmp so we specify the current directory instead.
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edg-job-get-output --dir `pwd` -i slic.jdl
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Other Commands
List files on the mass storage system at DESY.
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export LFC_HOST=`lcg-infosites --vo ilc lfc`
lfc-ls -l /grid
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Put a file into DESY mass storage.
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echo "test" > /tmp/test_file
lcg-cr -v --vo ilc -l lfn:/grid/ilc/test/test_file file:/tmp/test_file -d srm-dcache.desy.de
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jid
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Links
gLite User Guide
Virtual Data Toolkit (VDT)
CERN AFS UI Setup - setup instructions on lxplus@cern