NERSCPowering Scientific Discovery Since 1974

Allocation Year Rollover process

December 23, 2013 by Francesca Verdier

Allocation Year 2013 (AY13) ends at 23:59:59 on Monday, January 13, 2014. AY14 runs from Tuesday, January 14, 2014 through Monday, January 12, 2015.  The major features of the rollover are:

  • charging acroess the AY boundary: All batch jobs will continue running during the rollover. Time accrued before midnight will be charged to AY13 repos; time accrued after midnight will be charged to AY14 repos. Running batch jobs that are associated with non-continuing repositories will have the AY14 component of their usage charged to a NERSC AY14 overhead repository. Queued ("idle") jobs associated with non-continuing repositories will fail upon startup in AY14.
  • Edison scheduling and charging: During AY13 Edison was in a pre-production phase.  During this time it utilized "fairshare" batch job scheduling, and there were no repository charges for its use.  Beginning on January 14, Edison's batch system will begin using the same age-based scheduling methods that are used on Hopper and Carver.  Also, repo charging will begin, using the same charging algorithm as the other NERSC MPP systems.  Note that the machine charge factor for Edison is 2.0; for comparison, Hopper's charge factor is 1.0, and Carver's is 1.5.
  • Account creation moratorium: No user accounts will be created or validated after Wednesday, January 8 at noon until Tuesday, January 14 at 08:00. Any such changes made in NIM during this time will not take effect until after AY14 begins.

For more details see: Allocation Year Rollover: 2013 to 2014.