Difference: LHCComputingGrid (15 vs. 16)
Revision 162006-06-19 - AndrasLaszlo
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Getting access to LHC Computing Grid. One can find a brief introductory material at the RMKI's getting started page , where you can find information on how to get access to LCG. There are also simple examples on that page.
Some more practical information on running a typical job. | ||||||||
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Note1: unfortunately, I encountered that the lcg-cr action often fails (this should be remedied in future). Therefore, it is convenient to put an lcg-cr command into a checker loop: | ||||||||
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| > > | #!/bin/sh | |||||||
| RESULT=1 | ||||||||
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| > > | TRIES=0 | |||||||
| while (( $RESULT = 0 )) ; do
lcg-cr --vo cms -d grid100.kfki.hu -l lfn:/grid/cms/alaszlo/destintation/test_file.txt file:/afs/kfki.hu/home/alaszlo/source/test_file.txt
RESULT=$? | ||||||||
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| > > | TRIES=$(($TRIES+1)) if (( $TRIES >= 5 )) ; then echo "lcg-cr failed. Giving up after 5 tries." ; exit 1 ; fi | |||||||
| if (( $RESULT = 0 )) ; then sleep 1m ; fi done | ||||||||
| Line: 95 to 99 | ||||||||
| int main(int argc, char *argv[]) { // Open the datafile for reading. | ||||||||
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| < < | igstream ifile("/grid/cms/alaszlo/some_datafile.dat"); | |||||||
| > > | igstream igfile("/grid/cms/alaszlo/some_datafile.dat"); | |||||||
| // Extract data from your datafile with 'igstream::operator>>' or with 'igstream::read(char*, int)'. // Close the datafile. | ||||||||
| Changed: | ||||||||
| < < | ifile.close(); | |||||||
| > > | igfile.close(); | |||||||
| // Open the datafile for writing. | ||||||||
| Changed: | ||||||||
| < < | ogstream ofile("/grid/cms/alaszlo/some_datafile.dat"); | |||||||
| > > | ogstream ogfile("/grid/cms/alaszlo/some_datafile.dat"); | |||||||
| // Write data to your datafile with 'ogstream::operator<<' or with 'ogstream::write(char*, int)'. // Close the datafile. | ||||||||
| Changed: | ||||||||
| < < | ofile.close(); | |||||||
| > > | ogfile.close(); | |||||||
| // Open the datafile for reading, through a filter program. | ||||||||
| Changed: | ||||||||
| < < | igpstream ipfile("/grid/cms/alaszlo/some_datafile.dat.gz", "gunzip --stdout %f"); | |||||||
| > > | igpstream igpfile("/grid/cms/alaszlo/some_datafile.dat.gz", "gunzip --stdout %f"); | |||||||
| // Extract data from your datafile with 'igpstream::operator>>' or with 'igpstream::read(char*, int)'. // Close the datafile. | ||||||||
| Changed: | ||||||||
| < < | ipfile.close(); | |||||||
| > > | igpfile.close(); | |||||||
| // Open the datafile for writing, through a filter program. | ||||||||
| Changed: | ||||||||
| < < | ogpstream opfile("/grid/cms/alaszlo/some_datafile.dat.gz", "gzip - > %f"); | |||||||
| > > | ogpstream ogpfile("/grid/cms/alaszlo/some_datafile.dat.gz", "gzip - > %f"); | |||||||
| // Write data to your datafile with 'ogpstream::operator<<' or with 'ogpstream::write(char*, int)'. // Close the datafile. | ||||||||
| Changed: | ||||||||
| < < | opfile.close(); | |||||||
| > > | ogpfile.close(); | |||||||
| return 0; } | ||||||||
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| -- AndrasLaszlo - 22 Mar 2006 | ||||||||
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View topic | History: r16 < r15 < r14 < r13 | More topic actions...
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