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Important Info on Upcoming End of Allocation Year

December 12, 2017 by Yun He

Important Info on Upcoming End of Allocation Year 

The 2017 NERSC allocation year (AY) technically ends on Monday, January 8, 2018, but jobs in the queue on Cori and Edison at midnight on January 8 will be eligible to run and will be charged to AY17 through 6 a.m. on January 9, when a system maintenance will begin on those two systems.  Many changes will be in effect starting on Tuesday, January 9, the first day of the 2018 allocation year.

Maintenance on Cori and Edison Coinciding with AY Rollover

There will be a maintenance on Cori and Edison from 6 a.m. to 9 p.m. Pacific Time on Tuesday, January 9, 2018.  Jobs in the queue will continue to run until the maintenance starts at 6 a.m. and will be charged against the AY17 allocation. When the systems are returned from maintenance at 9 p.m. on Tuesday, jobs in the queue that are not associated with a valid AY18 repo will fail. Jobs submitted in AY17 associated with a valid AY18 repo will be charged to the AY2018 repo account.

Allocation Year Turnover

Beginning on January 2, 2018, the premium QOS will be disabled on Edison and Cori.  Premium  will be available again in the new AY. No new user accounts will be created between noon on January 2, 2018 and noon on Tuesday, January 9, 2018.

The NIM account management web interface will be unavailable for approximately one hour around 7 p.m. Pacific Time on January 8. Any sessions logged into NIM before that time will need to be refreshed by logging out and logging back in, in order to view accurate information after the outage.

If a user account is not part of a continuing or new repo for AY18, then it is considered discontinued. Discontinued user accounts will have login access until February 9, 2018. This is to permit discontinued users to clean up their data, not to submit jobs. Discontinued users' scratch directories will be deleted on February 10, 2018.

For more information on the allocation year turnover, please see

NERSC Policy Changes in AY 2018

There are a number of changes that will affect users beginning January 9, 2018. Among them

  • New specifications to request resources in batch jobs scripts on Cori and Edison, using quality of service rather than partitions;
  • Cori Intel Xeon Phi "KNL" nodes will be configured in quad, cache mode by default. Other modes will be available by reservation only;
  • A formal policy on when we update the default modules and programming environment (including retiring old software) on Edison and Cori;
  • Changes to how HPSS mass storage is charged.

For more information on new policy changes starting in AY 2018, please see

Multi-Factor Authentication

Multi-factor authentication (MFA) for SSH logins for added user account security will be available to users as an option in early 2018. NERSC's implementation will not require any special hardware. NERSC will make an announcement to users when the feature becomes available.