blacksmith - US West storage cluster degradation – Incident details

This incident is resolved. Sticky disk storage in our us-west region came under more read load than it could serve at normal latency, which slowed and produced higher error rates for Git-cached checkouts, incremental Docker builds, and container caching. We reduced and redistributed that load, and performance has been normal since approximately 17:15 UTC. Jobs that failed during the incident can be safely re-run.

Our us-west region storage cluster's latency and error rates have returned to baseline as of approximately 17:15 UTC, following mitigations that reduce load on the affected storage. Git-cached checkouts, incremental Docker builds, and container caching in us-west are back to normal, and we are monitoring to confirm the recovery holds while we continue to investigate the underlying cause. We will provide a final update within the next hour.

We are still working to resolve elevated latency on sticky disk storage in our us-west region; other regions are not affected. Customers running jobs in us-west may continue to see slower Git-cached checkouts, incremental Docker builds, and container caching. Our investigation into the underlying cause is ongoing and we will provide another update within the next 30 minutes.

Sticky disk storage in our us-west region is experiencing higher latency; our other regions are not affected. Customers running jobs in us-west may see slower Git-cached checkouts, incremental Docker builds, and container caching. We are continuing to investigate the underlying cause and will provide another update within the next 30 minutes.