Reduced Pitzer capacity starting Dec. 12, 2022

Beginning Monday, December 12, 2022, at 7 a.m., OSC will be taking the 40-core Pitzer nodes offline to replace the liquid cooling unit. We anticipate this work may take until Friday, December 16 to complete. Given uncertainties about the time necessary to complete this work, OSC engineers opted to begin this work before the December 13 downtime to increase the likelihood of the nodes returning online before the following weekend and to minimize the total outage. We are working with our vendors to reduce the outage duration as much as possible. This outage is roughly 33% of the cores and 40% of the GPUs. The impact of this extended outage for most users will be increased congestion on Pitzer. Any jobs that explicitly request the 40 core nodes (e.g., --constraint=40core in job scripts) will not be scheduled until after the 40 core nodes have returned to production.