GridPolicy

Grid service policy

T3_US_UMD is a CMS Tier-3 site funded entirely through grants awarded to the University of Maryland, receiving no CMS community funds. As such, we have no contractual obligations to the CMS community, though opportunistic use by members of the CMS virtual organization is encouraged.

Local users have first access to all available batch slots.

Opportunistic use by any member of the cms VO is allowed, but jobs may be killed at any time without notice.

A maximum wall clock time of 24 hours is strictly enforced.

Each job slot has 2GB of memory (3 GB in r720 machines). Jobs consuming more than 2GB of memory may be killed at any time without notice.

Each job slot assumes 1 CPU available. Multi-core jobs are not supported.

To send data to our site via CRAB's SE output mode, please follow these instructions. We strongly encourage the use of our SE by UMD-affiliated personnel only and reserve the right to delete user data stored in our SE without notice.

To request a data transfer of official data to our site using PhEDEx, please follow these instructions.

Officially deployed CMSSW releases are available through CVMFS and are handled centrally from CMS.

Obtaining and installing your Certificate

To obtain your certificate and join the CMS VO, follow the steps on this page.
That same page also has pointers to troubleshooting help if needed.

Your CERN certificate is available immediately as soon as you are able to sign upon https://ca.cern.ch using CERN Single Sign On (SSO) and will be automatically loaded in your browser.

If you need to, or prefer to, use a certificate from a different CA, that CA will give you instructions on how to obtain the certificate and load it in the browser.

To setup the certificate on the user interface from where you have to work you should:

• Export the certificate from your browser to a file in p12 format. How to export the certificate is very browser dependent. It will be something like Edit or Tools -> Preferences or (Internet) Options -> Advanced -> Security or Encryption -> View Certificates -> Your Certificates. In modern Firefox you should “backup” rather than “export” the certificate. You can find more instructions and hints for various browsers in this CERN CA help page. You can give any name to your p12 file (in the example below the name is mycert.p12).

• Place the p12 certificate file in the .globus directory of your home area. If the .globus directory doesn't exist, create it.

     cd ~

      mkdir .globus

      cd ~/.globus

      mv /path/to/mycert.p12 .

• Execute the following shell commands:

     rm -f usercert.pem

      rm -f userkey.pem

      openssl pkcs12 -in mycert.p12 -clcerts -nokeys -out usercert.pem

      openssl pkcs12 -in mycert.p12 -nocerts -out userkey.pem

      chmod 400 userkey.pem

      chmod 400 usercert.pem