Planned Maintenance

Please see below for current and upcoming scheduled maintenance which may impact users of BriCS services and facilities.

If you are concerned about the impact of upcoming maintenance, or encounter unexpected issues you suspect are related to a maintenance event, please get in touch with the BriCS team.

Date and Time	Description	Services Affected	Expected Impact	Notes
2026-09-30 @ 09:00 to 17:00 BST	Rebuild of compute and login nodes with updated node image	BlueCrystal 5 Early Access	During the maintenance session all login and compute nodes will be rebooted into the updated node image. SSH login access will be interrupted while the update is performed and the updated system is validated. All compute nodes will be placed in a reservation for the duration of the maintenance session to prevent jobs from starting that would overlap with the maintenance session.	Any jobs held due to the maintenance reservation will be queued during the maintenance session and scheduled to run after the reservation is removed.
2026-10-07 @ 06:00 to 22:00 BST	Upgrade to the management system that runs Isambard-AI Phase 2. A reservation will be used to drain the system from 06:00, with the upgrade starting immediately once the system has been drained.	Isambard-AI Phase 2	The system will be completely unavailable during this time. Jobs submitted that cannot complete before the reservation starts will be held until the upgrade is complete. Any queued work will remain queued until the system is resumed. We will restore access as early as possible.	Preparatory work begins in the week before the upgrade. This earlier work is not expected to affect your use of the system.