Batch Systems and the Grid

Grid-Control

Most full documentation for beginners with the tool can be found here.

In the checkout script this repo is used. It has also a lot of examples to look at.

The grid-control is properly installed by the checkout_packages.sh script (see Checkout Recipe).

Then you run it just by calling the executable go.py.

You can check that go.py is in the $PATH with which go.py.

• Error Codes

GFAL Tools

Since data on dcache is at most mounted read-only, one needs special tools to do so. Available are srm-tools, lcg tools and gfal-tools. Only the latter one support recursive commands

To use them, just add "gfal-" before usual POSIX commands:

• gfal-ls
• gfal-rm [-r]
• gfal-mkdir
• gfal-copy [-r]
• gfal-rename

using the usual prefix before the directory in question, e.g. srm://dcache-se-cms.desy.de:8443/srm/managerv2?SFN=/ for desy dcache or file://// for local files

Or if you are working on RWTH machines and want to access RWTH T2 storage: gfal-ls dcap://grid-dcap-extern.physik.rwth-aachen.de/pnfs/physik.rwth-aachen.de/cms/store/user/<your path>

Or if you are working on DESY machines and want to access DESY T2 storage: gfal-ls dcap://dcache-cms-dcap.desy.de/pnfs/desy.de/cms/tier2/store/user/<your path>

LCG Utilities

• LCG Utilities Documentation