How to use grid resources at BNL.
Get a Grid Certificate
In order to use grid resources, you'll first need to acquire a personal grid certificate. Follow these instructions.
Join a Virtual Organization
After obtaining a grid certificate, you'll need to become a member of a virtual organization (VO), or to add your grid certificate to the membership list on a VOMS (Virtual Organization Management System) server. Follow these instructions.
Use Grid Resources
The following steps are prerequisites to submitting grid jobs:
- Install your grid certificate in your home directory and web browser. Follow these instructions.
- Establish a grid environment, which is usually specific to your site or experiment. For example, ATLAS users need to export grid-specific environment variables and run a setup script; see the ATLAS TWiki, or the following commands may suffice:
# set your local ATLAS environment: export ATLAS_LOCAL_ROOT_BASE="/cvmfs/atlas.cern.ch/repo/ATLASLocalRootBase" alias setupATLAS="source ${ATLAS_LOCAL_ROOT_BASE}/user/atlasLocalSetup.sh" setupATLAS # set up your DDM environment: export RUCIO_HOME="/cvmfs/atlas.cern.ch/repo/sw/ddm/rucio-clients/latest" export RUCIO_AUTH_TYPE="x509_proxy" # export your CERN user name as your DDM nickname: export RUCIO_ACCOUNT="nickname" # set up a Rucio client: localSetupRucioClients
- Create a VOMS proxy. See the official VOMS client documentation, or use the voms-proxy-init command:
voms-proxy-init --voms=atlas -hours 240
User Information
Some basic BNL-specific grid information can be found here.
BNL's OSG gatekeepers are:
- gridgk01.racf.bnl.gov
- gridgk02.racf.bnl.gov
These gatekeepers can be used to submit batch jobs to the grid.
In order to log into the gatekeepers and use grid client software, obtain a BNL and SDCC computing account. Here is a basic guide for using the US ATLAS computing facility at BNL.
BNL/US ATLAS Computing Facility Usage Policy for OSG
Tutorials
- Obtaining a Certificate: How to request a certificate.
- Joining a VO: How to register with a virtual organization.