MonthlyMaintenanceWindow

UMIACS staff takes a monthly maintenance window to patch and reboot all UMIACS-supported hosts and services. This provides a way to ensure security updates are installed and activated on the numerous different platforms and appliances that we maintain.

The window for each month is calculated by adding 9 days to Microsoft's Patch Tuesday to allow us to marshal patches released that month from Microsoft, Red Hat, Apple, and other OS and application vendors and have enough time to get our systems prepared to reboot. This translates to the window being on the Thursday that occurs between the 17th and the 23rd (inclusive) of each month. The window lasts from 5pm-8pm.

Nexus will always have a reservation in place from 4:45pm-8pm on the day of the upcoming window to prevent jobs from being scheduled on compute nodes for the entirety of said window as well as 15 minutes before, to allow jobs to fully end. Any job submitted before the reservation begins that has a time limit that would run into the reservation will be held until at least the end of the reservation (8pm on the day of the window). This is to prevent issues with jobs failing to end properly causing delays in work we have scheduled during the window.

A list of upcoming maintenance windows is as follows, with the next one in bold. Again, the window is on the Thursday that occurs between the 17th and the 23rd (inclusive) of each month, and lasts from 5pm-8pm.

• December 19th 2024
• January 23rd 2025
• February 20th 2025
• March 20th 2025
• April 17th 2025
• May 22nd 2025
• June 19th 2025
• July 17th 2025
• August 21st 2025
• September 18th 2025
• October 23rd 2025
• November 20th 2025
• December 18th 2025

Archives

• January 17th 2013 - BEGIN time of 8pm-12am for this window through February 20th 2020
• February 21st 2013
• March 21st 2013
• April 18th 2013
• May 23rd 2013
• June 20th 2013
• July 18th 2013
• August 22nd 2013
• September 19th 2013
• October 17th 2013
• December 19th 2013
• January 23rd 2014
• February 20th 2014
• March 20th 2014
• April 17th 2014
• May 22nd 2014
• June 19th 2014
• July 17th 2014
• August 21st 2014
• September 18th 2014
• October 23rd 2014
• November 20th 2014
• December 18th 2014
• January 22nd 2015
• February 19th 2015
• March 19th 2015
• May 21st 2015
• June 18th 2015
• July 23rd 2015
• August 20th 2015
• September 17th 2015
• October 22nd 2015
• November 19th 2015
• December 17th 2015
• January 21st 2016
• February 18th 2016
• March 12th 2016 (Adjusted date for AVW power outage)
• April 21st 2016
• May 19th 2016
• June 23rd 2016
• July 21st 2016
• August 18th 2016
• September 22nd 2016
• October 20th 2016
• November 17th 2016
• December 22nd 2016
• January 19th 2017
• February 23rd 2017
• March 23rd 2017
• April 20th 2017
• May 18th 2017
• June 22nd 2017
• July 20th 2017
• August 17th 2017
• September 21st 2017
• October 19th 2017
• December 21st 2017
• January 18th 2018
• February 22nd 2018
• March 22nd 2018
• April 19th 2018
• May 17th 2018
• June 21st 2018
• July 19th 2018
• August 23rd 2018
• September 20th 2018
• October 18th 2018
• December 20th 2018
• January 24th 2019
• February 21st 2019
• April 18th 2019
• May 23rd 2019
• June 20th 2019
• July 18th 2019
• August 22nd 2019
• September 19th 2019
• October 17th 2019
• November 21st 2019
• December 19th 2019
• January 23rd 2020
• February 20th 2020
• April 23rd 2020 - BEGIN time of 5pm-7pm for this window through August 19th 2021
• June 18th 2020
• July 23rd 2020
• August 20th 2020
• September 17th 2020
• October 22nd 2020
• November 19th 2020
• December 17th 2020
• January 21st 2021
• February 18th 2021
• March 25th 2021 (Adjusted date for extended Spring Break)
• April 22nd 2021
• May 20th 2021
• June 17th 2021
• July 22nd 2021
• August 19th 2021
• September 23rd 2021 - BEGIN time of 5-8pm for this window and all others below
• October 21st 2021
• November 18th 2021
• January 20th 2022
• February 17th 2022
• March 24th 2022 (Adjusted date for Spring Break)
• April 21st 2022
• May 19th 2022
• June 23rd 2022
• July 21st 2022
• August 18th 2022
• September 22nd 2022
• October 20th 2022
• November 17th 2022
• January 19th 2023
• February 23rd 2023
• April 20th 2023
• May 18th 2023
• June 22nd 2023
• July 20th 2023
• August 17th 2023
• September 21st 2023
• October 19th 2023
• December 20th 2023 (Adjusted date for early Winter Break)
• January 18th 2024
• February 22nd 2024
• March 21st 2024
• April 18th 2024
• May 23th 2024
• June 20th 2024
• July 18th 2024
• August 22nd 2024
• September 19th 2024
• October 17th 2024
• November 21st 2024