Difference: GetGridCertificate (r5 vs. r4)

How to Get Access to the Grid

The Grid is where large, ATLAS MC and data files are located. To use them, you need to download them to a local machine (there is a separate wiki page on how to download things from the grid).

You need to renew your grid certificate once a year. You should receive email notifications maybe once a week from a month before expiration on. These emails will contain a link to the page to renew the grid certificate, as well as to a FAQ page. Some notes follow. There are two options. You can renew or generate a new certificate. For a new certificate-

To renew, click the replacement certificate button on the link given to you.

  • Keep in mind that you need to renew from the same browser your certificate was issued from (i.e. it needs to be stored in the browser you are using- I have had problems with loss of these certificates when the browser gets updated.)

For new users:

Here is a pretty good step by step description on what you have to do:


After applying for a grid certificate you have to become a member of the ATLAS virtual organization (VO):


In order to install your certificate (once you received it by email) go to:


For information on using the grid, or for more tips on getting grid access, see the page on the msu website here: http://www.pa.msu.edu/hep/atlas/index.php?p=grid. You can also look at the TWiki page DataFromGrid for more advanced information on retrieving files from the grid.

-- JennyHolzbauer - 13 Jul 2009, -- SarahHeim - 23 Jul 2009

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