All CISL HPC systems will be down for scheduled maintenance May 7-8 deploy an updated version of the PBS batch scheduling system across all resources and perform necessary file system maintenance.

During this time, all Derecho and Casper compute nodes will be unavailable. Login nodes will be unavailable at the beginning of the outage window in order to allow for file system maintenance. Scheduler reservations will be put in place to ensure that all user jobs have completed by May 7 as the downtime begins. Any jobs that are queued on Derecho and Casper when the downtime begins will be retained for execution when the systems return to service.

Our intention is to return all systems to service as quickly as possible, with a planning date of Wednesday morning May 8, however precise timing will be determined by maintenance events as they unfold. 

Progress will be communicated through the Notifier system throughout the course of the outage.