13 out of 15 servers have been migrated without any issues.

11:00 — VMs on the Ryzen 9950X (node33) and EPYC Genoa 9654 (node23) will be shut down and booted on other hardware. This is equivalent to a regular restart via the control panel, but required to complete the migration for these two remaining nodes.

14:00 — All 15 servers successfully migrated. The Ryzen 9950X and EPYC Genoa nodes will go into brief hardware maintenance to ensure optimal redundancy before migrating VMs back later this evening — one DIMM on the Genoa server was flagging an issue and will be replaced. Otherwise all done; only the network cutover remains tonight.

March 6, 23:00 — Network cutover scheduled. There may be a brief 1–2 minute outage while IP prefixes are re-announced via the Älvsjö upstream.

23:10 — IPv4 cutover complete. 13 seconds of downtime. Currently investigating an issue with IPv6 connectivity.

23:13 — IPv6 connectivity restored. Migration complete — Kista datacenter is now offline. All services are running from Älvsjö.

23:00 — Final network cutover: we will begin announcing our IP prefixes via our upstream in Älvsjö instead of Kista. No downtime is expected, but there may be up to ~1 minute of brief jitter during the BGP reconvergence. This is coordinated with our upstream provider — thanks to Daniel at Obenet for helping ensure a smooth transition.

With this, the Kista datacenter migration is complete. We have successfully moved the entire datacenter — essentially live — to Älvsjö. Thank you for your patience.

10 out of 15 servers have been moved successfully — zero downtime, zero reboots so far.

Reboot required for Ryzen 9950X and EPYC Genoa 9654 plans: these 2 servers cannot be live-migrated because we don't have matching CPU hardware in Älvsjö for the host-cpu passthrough flag. VMs on these nodes need a single restart (stop + boot — just like any restart via the control panel). No other action is needed.

• EPYC Genoa 9654: once set to the "AMD EPYC Milan" CPU type, VMs can be live-migrated back without issues.
• Ryzen 9950X: a second restart will be needed the same day to migrate the VM back to its node, because the base-frequency difference is too large and would cause a TSC clock drift issue.