Back to Future Events

ARC 2024 Winter Maintenance

December 6, 2023

2024 ARC Winter Maintenance

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Great Lakes /scratch Maintenance

March 14, 2022

Great Lakes Outage: /scratch Maintenance

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Winter 2022 Maintenance

January 10, 2022

ARC Winter 2022 Maintenance

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Summer 2021 Maintenance

August 9, 2021

See Summer 2021 maintenance information here:

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Winter 2021 Maintenance

January 11, 2021

ARC-TS Winter 2021 Maintenance

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Great Lakes Summer 2020 Maintenance

August 3, 2020

Great Lakes Summer 2020 Maintenance

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Open OnDemand on Great Lakes being upgraded

May 18, 2020

1:00 PM – 5:00 PM: We are migrating Open OnDemand on Great Lakes from version 1.4 to 1.6 to fix a security issue. Users will…

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Winter 2020 Maintenance

March 9, 2020

The ARC-TS 2020 winter maintenance will start on March 9, 2020.  You can read more about it here.   Great Lakes, Lighthouse, and Armis2…

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Great Lakes Billing Begins

January 6, 2020

Billing for Great Lakes will begin on January 6, 2020 at 9am. Rates for using Great Lakes can be found here:   . No…

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Beta Retires

November 29, 2019

Beta will be retired after both Flux and Armis have been retired, as the purpose of Beta is to assist users to transition to the…

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Great Lakes Migration Complete

November 25, 2019

All HPC accounts, users, and workflows must be migrated to either Great Lakes (Standard, GPU, Large-Memory, and On-demand Flux) or Lighthouse (Flux Operating Environment nodes)…

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Great Lakes Open for General Availability

August 19, 2019

Assuming all initial testing is successful, we expect that Great Lakes will become available for University users after the ARC-TS summer maintenance.

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Great Lakes Early User Testing Ends

August 14, 2019

The Great Lakes early user period for testing will end. Great Lakes will transition into production and users will be able to submit work as…

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2019 Summer Maintenance

August 12, 2019

The ARC-TS annual summer maintenance will begin.   The details, services impacted,  and length of the maintenance will be determined when we get closer to the date. …

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Great Lakes Open for Early User Testing

July 15, 2019

We will be looking for sets of friendly users who will be able to test different aspects of the system to submit their workloads to…

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Great lakes firmware updates complete

July 8, 2019

This date is a rough estimate.  Great Lakes, as of June, is running a GA-candidate HDR-100 InfiniBand firmware.   We will schedule an update to the…

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Great Lakes primary installation complete and ARC-TS begins loading and configuration

May 30, 2019

The Great Lakes installation is primarily complete other than waiting for final HDR firmware testing for the new InfiniBand system.  The current InfiniBand system is…

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HPC OnDemand Available for Beta

March 8, 2019

The replacement for ARC Connect, called HPC OnDemand, will be available for users.  This will allow users to submit jobs via the web rather than…

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Beta Cluster testing continues

January 8, 2019

If you are a current HPC user on Flux or Armis and have not used Slurm before, we highly recommend you login and test your…

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Great Lakes Beta (GLB) created

November 1, 2018

Great Lakes Beta is installed for HPC support staff to build and test software packages on the same hardware in Great Lakes.

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Beta HPC cluster available

October 2, 2018

The Beta HPC cluster was introduced to enable HPC users to begin migrating their Torque job scripts to Slurm and test their workflows on a Slurm-based…

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Great Lakes Installation Begins

October 1, 2018

Dell, Mellanox, and DDN will be delivering and installing the hardware to deliver the new Great Lakes service.  These teams will be working along side the…

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If you have questions, please send email to

Order Service

Billing for the Great Lakes service began on January 6, 2020. Existing, active Flux accounts and logins have been added to the Great Lakes Cluster. Complete this form to get a new Great Lakes cluster login.

If you would like to create a Great Lakes Cluster account or have any questions, contact with lists of users, admins, and a shortcode. Trial accounts are also available for new PIs.