Update: Extended system downtimes scheduled for Tuesday, March 5

February 27, 2019

Several major system maintenance operations are scheduled for Tuesday, March 5, starting at 6 a.m. and are expected to extend through late Tuesday evening or early Wednesday morning. The Cheyenne and Casper clusters, the GLADE file system, NCAR Campaign Storage, Globus data transfer services, and the High Performance Storage System (HPSS) will be unavailable throughout the maintenance period.

The scheduled work includes GLADE firmware and InfiniBand switch upgrades as well as security updates to UCAR’s enterprise networking infrastructure.

System reservations will prevent batch jobs from executing on Cheyenne and Casper after 6 a.m. All queues will be suspended and the clusters’ login nodes will be unavailable throughout the update period. All batch jobs and interactive processes, including HPSS data transfers, that are still executing when the outage begins will be killed. Globus transfers that are still executing when the outage begins will be suspended and resumed when the systems are restored.

CISL will inform users through the Notifier service when all of the systems are returned to service.