University of Cambridge Computer Laboratory - Status Page

VM storage server repair (xene-pool1)
Scheduled for 17 June, 2025 at 16:00 – 18:30 about 3 hours
  • Planned
    17 June, 2025 at 16:00
    Planned
    17 June, 2025 at 16:00

    Following on from the earlier unscheduled VM storage outage, we need to replace a failed memory module in the storage server that backs one of our departmental VM pools in order to restore performance and reliablity.

    This requires us to shut down all VMs on xene-pool1, which will affect the following departmental services:

    • cl-student-ssh - Undergraduate SSH server

    • MSA (partial outage, one of two servers affected)

    • Request Tracker

    • VPN2 (partial outage, one of two servers affected and new connections are already steered towards the other server)

    • Departmental database server (SQL Server / svr-win-db / db-*)

    • Windows Remote Desktop service

    • dbwebserver

    • WSUS (Windows Updates)

    And it will affect the following user VMs:

    • cl-teaching-ecad

    • dev-compilers0

    • egress

    • knot

    • lmserv-mentor

    • svr-papers

    • svr-www-ecad

    • svr-yg386-web

    These will be shut down soon after 5pm and will remain off for approximately an hour. The at-risk window is given as 2.5 hours due to uncertainty with the exact timing.

    We will take the opportunity to do some routine maintenance (software and firmware updates) of the storage system at the same time, in order to avoid a future need to do more scheduled maintenance.

100% - uptime

Caelum Console (server management) - Operational

100% - uptime

Request Tracker - Operational

100% - uptime

Other Internal Services - Operational

100% - uptime

External Services - Operational

100% - uptime

Network - Operational

100% - uptime
100% - uptime

GN09 - Operational

100% - uptime

WCDC - Operational

99% - uptime
100% - uptime

Main VM Pool (WCDC) - Operational

100% - uptime

GPUs - Operational

100% - uptime

Secondary VM Hosts - Operational

100% - uptime

Xen Orchestra - Operational

100% - uptime
100% - uptime

Filer - Operational

100% - uptime

Archive Server - Operational

100% - uptime

Data Replication - Operational

100% - uptime

Other Secondary Storage Systems - Operational

100% - 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

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