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
2025-11-17 @ 9:00 to 17:00 UTC	Reduced compute capacity due to cooling infrastructure maintenance.	Isambard-AI Phase 2 Compute Service	Isambard-AI Phase 2 compute nodes will be in placed in maintenance mode. Initially ALL compute nodes will be in maintenance but half the nodes will be returned to service early afternoon with remaining nodes returned at the end of the day.	Earlier planned maintenance included 2 days but this was reduced to 1 day following further discussions with maintenance contractor.
2025-11-19 @ 10:00 to 13:00 UTC	Network update	Isambard-AI Phase 1, Isambard-AI Phase 2, Isambard 3	All services should be considered at risk as the site network capacity is being upgraded.
2025-11-24 @ 9:00 until 2025-11-25 @ 17:00 UTC	Cluster maintenance to upgrade cluster management software.	Isambard 3 Grace and Isambard 3 MACS	Isambard 3 Grace and Isambard 3 MACS will not be available whilst the upgrade takes place.
2025-12-02 @ 10:00 to 17:00 UTC	Physical works affecting Isambard-AI Phase 2	Isambard-AI Phase 2 Compute Service	Isambard-AI Phase 2 compute nodes need to be idle to allow physical works to be performed. Compute nodes will be drained using a reservation starting at 10:00 local. User access to the login nodes will not be affected and work can be submitted as usual and will queue until service is resumed. We expect service to be resumed by 16:00 local or earlier.