NERSCPowering Scientific Discovery Since 1974

FAQ

  • Why are my logins failing? There are a number of reasons why your logins might not work listed below.  To contact NERSC please see Getting help. - Your password might have expired (they last 6 months) or you simply forgot it.  If this is the case you'll need to call in to NERSC and get it reset. - You might have exceeded the login failures limit which is a security measure that prevents logins after a certain number of consecutive failed logins.  If you think this might be the problem, you should login to NIM.  The…
  • Why don't my jobs run? If your jobs are just sitting in the "qw" state and not starting you cannot ask SGE directly why they aren't running (that service is turned off for scalability) so you have to do some detective work.  Things to consider include: - Is the cluster full?  Maybe you just need to be patient, especially if your project doesn't have any shares.  In that case your jobs won't run until the cluster isn't full.  In any event your jobs can't run until some other jobs finish and sometimes there are a…
  • How can I prevent my jobs from running on a particular batch node? Please see the Submitting Jobs page for "Exclude a node or nodes". Also, if you do see a bad node please file a ticket and let us know so we can take it out of service and fix the…
  • Why do I get font errors with Mathematica? If you get errors like "bad font path element" when starting Mathematica it might mean that your font path is missing an element.  You can add the element yourself with the following command: xset fp+ tcp/carvergrid.nersc.gov:7100 To see what your fontpath is use xset q See also Mathematica.  Sometimes restarting xfs on the login nodes can…