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There will be additional scheduled maintenance at MGHPCC between June 5th and 6th.

As part of the work during the MGHPCC Outage, one of the Cooling Distribution Unit (CDU) in Pod 7c will be replaced. This will allow for future expansion into this space.

This work will run from Thursday Jun 5th until the evening of Friday June 6th. This means nodes whose names begin with holy7c02, 04, 06, 08, 10, 12 will not come back online after the outage and will remain down until this CDU update is complete.

This impacts the following partitions. If you are using one of those partitions please use the public sapphire partition while your equipment is being serviced. These nodes will be returned to service once the CDU work is complete:

• blackhole

• blackhole_priority

• davies

• desai

• eddy

• huce_cascade

• huce_cascade_priority

• huttenhower

• jacobsen2

• janson

• janson_cascade

• ke

• lukin

• nguyen

• seas_compute

• shared

• tambe

• vishwanath

• whipple

• xlin

The MGHPCC Holyoke data center will be performing power work on May 21st -23rd. This work will take out one half (or one 'side') of the power capacity for certain rows/racks including our compute rows. Because of our power draw, one side is not enough power to keep each full rack running.

As such, we will be adding a reservation to idle half the nodes in the partitions listed below. A reservation will cause nodes to drain as jobs complete and stop scheduling new jobs on those nodes if they cannot be completed before the outage. This will allow us to idle and power down those nodes prior to the work and avoid potential blackout/brownout on those racks.

This will mean that these partitions will be up and available, but that half the nodes from each will be down (assuming an even number of nodes).

This work is part of an on-going power capacity upgrade at MGHPCC. We expect this will be the last power work needed and the facility will then provide enough additional power for future expansion as well adding overhead for the current load.

The affected partitions are:

• arguelles_delgado

• bigmem_intermediate

• blackhole_gpu

• eddy gershman

• hejazi

• hernquist

• hoekstra

• huce_ice

• iaifi_gpu

• iaifi_gpu_requeue

• iaifi_priority

• jshapiro

• jshapiro_priority

• kempner

• kempner_requeue

• kempner_h100

• kempner_h100_priority

• kempner_h100_priority2

• kovac kozinsky

• kozinsky_gpu

• kozinsky_requeue

• ortegahernandez_ice

• rivas

• seas_compute

• seas_gpu

• siag_combo

• siag_gpu

• sur

• zhuang