University of Cambridge Computer Laboratory - Notice history

All systems operational

100% - uptime

Caelum Console (server management) - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
Feb 2026100.0% uptime

Request Tracker - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
Feb 2026100.0% uptime

Other Internal Services - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
Feb 2026100.0% uptime

External Services - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
Feb 2026100.0% uptime

Network - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
Feb 2026100.0% uptime
100% - uptime

GN09 - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
Feb 2026100.0% uptime

WCDC - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
Feb 2026100.0% uptime
100% - uptime

Main VM Pool (WCDC) - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
Feb 2026100.0% uptime

GPUs - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
Feb 2026100.0% uptime

Secondary VM Hosts - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
Feb 2026100.0% uptime

Xen Orchestra - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
Feb 2026100.0% uptime
100% - uptime

Filer - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
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Archive Server - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
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Data Replication - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
Feb 2026100.0% uptime

Other Secondary Storage Systems - Operational

100% - uptime
Dec 2025 · 100.0%Jan 2026 · 100.0%Feb · 100.0%

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Dec 2025100.0% uptime
Jan 2026100.0% uptime
Feb 2026100.0% uptime
100% - uptime

Third Party: Fastmail → General Availability - Operational

Third Party: Fastmail → Mail delivery - Operational

Third Party: Fastmail → Web client and mobile app - Operational

Third Party: Fastmail → Mail access (IMAP/POP) - Operational

Third Party: Fastmail → Login & sessions - Operational

Third Party: Fastmail → Contacts (CardDAV) - Operational

Notice history

Feb 2026

Delays to mail forwarded through cl.cam.ac.uk / cst.cam.ac.uk
  • Resolved
    Resolved

    This problem has been fully mitigated.

  • Monitoring
    Monitoring

    Our email routing provider (Forward Email) mitigated the issue at around 17:00. We will continue to monitor, but so far the mitigation appears to be successful.

    This issue was due to a third party (Spamhaus) erroneously listing a Forward Email server as a source of spam. Numerous other email systems around the world (including both UIS and Microsoft) trust Spamhaus to identify malicious or compromised systems, and so had started to reject email from that specific Forward Email server, incorrectly believing it to be behaving maliciously. Forward Email have taken the affected server out of rotation until Spamhaus rectifies the issue.

  • Identified
    Identified

    We are aware that some mail forwarded through our departmental domains cst.cam.ac.uk and cl.cam.ac.uk is not getting through at the moment. This is particularly affecting mail forwarded to @cam.ac.uk addresses, and is happening due to a problem at our provider. We have contacted the provider and UIS in order to try to resolve this as quickly as possible.

    We believe that most affected mail will get through eventually, once the problem is rectified. There is a chance that some mail will be bounced to its original sender.

    Mail sent directly to @cam.ac.uk addresses is not affected.

Jan 2026

No notices reported this month

Dec 2025

Departmental GPU cluster storage maintenance
  • Completed
    18 December, 2025 at 17:38
    Completed
    18 December, 2025 at 17:38

    Maintenance has completed successfully.

    The shared development servers are available again.

    VMs can be started again via Xen Orchestra.

  • In progress
    18 December, 2025 at 16:30
    In progress
    18 December, 2025 at 16:30
    Maintenance is now in progress
  • Planned
    18 December, 2025 at 16:30
    Planned
    18 December, 2025 at 16:30

    We have been advised by the manufacturer that the storage server that holds home directories and VM disks on the departmental GPU cluster needs an urgent firmware update in order to avoid a possible data-loss issue.

    Due to the risk of data loss and the upcoming Christmas closure and staff leave, we think it's best to do this update at short notice on Thursday 18th December.

    This will affect personal GPU/CPU development VMs named dev-gpu-* and dev-cpu-*, as well as the shared development servers dev-cpu-1, dev-gpu-2, dev-gpu-acs and dev-cpu-acs.

    The shared servers will be shut down before the maintenance, and started again once it is complete.

    Affected VMs will be shut down before the maintenance, and will not be started again automatically. You will be able to start them again via Xen Orchestra once the maintenance has completed - please check this page and await confirmation that it's OK to try to start your VM.

Dec 2025 to Feb 2026

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