ARC Cluster Status - Revision history

Dschulz at 15:23, 10 September 2026

2026-09-10T15:23:02Z

← Older revision		Revision as of 15:23, 10 September 2026
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	If you have any questions ahead of time, or experience any symptoms on the date, please contact RCS via support@hpc.ucalgary.ca		If you have any questions ahead of time, or experience any symptoms on the date, please contact RCS via support@hpc.ucalgary.ca
			}}


			{{Message of the day item
			\| title = Power Outage Caused loss of most or all jobs
			\| date = 2026/09/10
			\| message = Main campus experienced a power outage around 06:30 on Sep 10, 2026 resulting in the loss of most possibly all jobs. Staff are restarting the clusters. Please submit replacement jobs and they will run as resources return to scheduling.
	}}		}}

	{{Navbox ARC}}		{{Navbox ARC}}
	[[Category:ARC]]		[[Category:ARC]]

2026-06-23T21:35:50Z

← Older revision		Revision as of 21:35, 23 June 2026
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	\| date = 2026/06/22		\| date = 2026/06/22
	\| message =		\| message =
			}}

			{{Message of the day item
			\| title = Upcoming File Server Update July 2, 2026. Starting at 9AM
			\| date = 2026/06/23
			\| message = File Server Update

			We will be updating the file servers on July 2, 2026, beginning at 9AM continuing throughout the day. We do not expect any service interruptions or degradation during the process.

			If you have any questions ahead of time, or experience any symptoms on the date, please contact RCS via support@hpc.ucalgary.ca
	}}		}}

	{{Navbox ARC}}		{{Navbox ARC}}
	[[Category:ARC]]		[[Category:ARC]]

2026-06-22T20:09:50Z

← Older revision		Revision as of 20:09, 22 June 2026
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	}}		}}

			{{Message of the day item
			\| title = Systems Operating Normally
			\| date = 2026/06/22
			\| message =
			}}

	{{Navbox ARC}}		{{Navbox ARC}}
	[[Category:ARC]]		[[Category:ARC]]

2026-06-01T17:25:26Z

← Older revision		Revision as of 17:25, 1 June 2026
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	If you have questions or concerns, please contact support@hpc.ucalgary.ca		If you have questions or concerns, please contact support@hpc.ucalgary.ca
			}}


			{{Message of the day item
			\| title = Arc Login and Scheduling Outage June 3, 2026, Starting at 9AM
			\| date = 2026/06/03
			\| message = ⚠️ Urgent Security Update

			The Arc Support nodes (Arc login node, DTN, OOD, and scheduling system) will be unavailable starting at 9 AM on June 3, 2026 to install an urgent kernel update. You will be unable to login to Arc but queued jobs will continue to run. The compute nodes are actively being rebooted as they become idle resulting in fewer available resources for the next week or so.

			Sorry for the inconvenience.

	}}		}}

2026-05-15T17:33:44Z

← Older revision		Revision as of 17:33, 15 May 2026
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	{{Message of the day item		{{Message of the day item
	\| title = Emergency ~~Update Complete~~		\| title = Emergency Security Mitigation
	\| date = 2026/05/07		\| date = 2026/05/15
	\| message = ~~✅ Filesystem Outage Complete~~		\| message = ptrace has been disable on clusters

	~~Arc is back in production~~.		The ptrace system call has been temporarily disabled while we await a patch for CVE-2026-46333. This means that software such as gdb or strace will not work.

	If you have questions or concerns, please contact support@hpc.ucalgary.ca		If you have questions or concerns, please contact support@hpc.ucalgary.ca
	}}		}}


	{{Navbox ARC}}		{{Navbox ARC}}
	[[Category:ARC]]		[[Category:ARC]]

2026-05-07T18:49:24Z

← Older revision		Revision as of 18:49, 7 May 2026
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	}}		}}

	{Message of the day item		{{Message of the day item
	\| title = Emergency Update Complete		\| title = Emergency Update Complete
	\| date = 2026/05/07		\| date = 2026/05/07

2026-05-07T16:56:28Z

← Older revision		Revision as of 16:56, 7 May 2026
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	Arc is back in production.		Arc is back in production.

	~~As of Friday Feb 20, 2026 - Due to some configuration issues on the network Fluent is not available on ARC at this time.~~
	~~We are working to fix the issues and the software will return as soon as possible. Please try resubmitting any affected jobs later.~~

	If you have questions or concerns, please contact support@hpc.ucalgary.ca		If you have questions or concerns, please contact support@hpc.ucalgary.ca

2026-05-07T16:43:14Z

← Older revision		Revision as of 16:43, 7 May 2026
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	Sorry for the inconvenience.		Sorry for the inconvenience.

			}}

			{Message of the day item
			\| title = Emergency Update Complete
			\| date = 2026/05/07
			\| message = ✅ Filesystem Outage Complete

			Arc is back in production.

			As of Friday Feb 20, 2026 - Due to some configuration issues on the network Fluent is not available on ARC at this time.
			We are working to fix the issues and the software will return as soon as possible. Please try resubmitting any affected jobs later.

			If you have questions or concerns, please contact support@hpc.ucalgary.ca
	}}		}}

	{{Navbox ARC}}		{{Navbox ARC}}
	[[Category:ARC]]		[[Category:ARC]]

2026-05-06T16:51:01Z

← Older revision		Revision as of 16:51, 6 May 2026
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	If you have questions or concerns, please contact support@hpc.ucalgary.ca		If you have questions or concerns, please contact support@hpc.ucalgary.ca
			}}

			{{Message of the day item
			\| title = Arc Login and Scheduling Outage May 7, 2023, Starting at 9AM
			\| date = 2026/05/07
			\| message = ⚠️ Urgent Security Update

			The Arc Support nodes (Arc login node, DTN, OOD, and scheduling system) will be unavailable starting at 9 AM on May 7 to install an urgent kernel update. You will be unable to login to Arc but queued jobs will continue to run. The compute nodes are actively being rebooted as they become idle resulting in fewer available resources for the next week or so.

			Sorry for the inconvenience.

	}}		}}

	{{Navbox ARC}}		{{Navbox ARC}}
	[[Category:ARC]]		[[Category:ARC]]

2026-02-23T22:14:53Z

← Older revision		Revision as of 22:14, 23 February 2026
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	Sorry for the inconvenience.		Sorry for the inconvenience.

			As of Friday Feb 20, 2026 - Due to some configuration issues on the network Fluent is not available on ARC at this time.
			We are working to fix the issues and the software will return as soon as possible. Please try resubmitting any affected jobs later.

			If you have questions or concerns, please contact support@hpc.ucalgary.ca
			}}

			{{Message of the day item
			\| title = Filesystem Outage Complete
			\| date = 2026/02/23
			\| message = ✅ Filesystem Outage Complete

			All clusters are back in production.

	As of Friday Feb 20, 2026 - Due to some configuration issues on the network Fluent is not available on ARC at this time.		As of Friday Feb 20, 2026 - Due to some configuration issues on the network Fluent is not available on ARC at this time.