Update: HPC system downtime May 6-11 for NWSC electrical repairs

April 11, 2019

CISL is pleased to announce a significant change to previously announced plans for the May 6-11 HPC systems downtime. CISL system administrators and NWSC engineers have determined it will be possible to maintain UPS power to all of Cheyenne’s login nodes, the Casper cluster, GLADE, and the HPSS system throughout the electrical repair efforts, so those will remain in service. However, Cheyenne’s compute nodes will be powered down and unavailable for use.

The May repairs will follow several weeks of facilities work that will be carried out without powering down any of the HPC systems.

A major operating system update to the Cheyenne system also is being planned and will require an extended downtime, most likely in late June or early July. Details will be announced in the Daily Bulletin when the dates are set.

The May 6-11 outage will be followed by an additional several weeks of facilities maintenance that can be performed without powering down the systems and so no user impact is anticipated. Information on scheduled outages is available on the CISL HPC calendar.