Redesigning Workers KV for increased availability and faster performance

On June 12, 2025, Cloudflare suffered a significant service outage that affected a large set of our critical services. As explained in our blog post about the incident, the cause was a failure in the underlying storage infrastructure used by our Workers KV service. Workers KV is not only relied upon by many customers, but serves as critical infrastructure for many other Cloudflare products, handling configuration, authentication and asset delivery across the affected services. Part of this infrastructure was backed by a third-party cloud provider, which experienced an outage on June 12 and directly impacted availability of our KV service.

Today we're providing an update on the improvements that have been made to Workers KV to ensure that a similar outage cannot happen again. We are now storing all data on our own infrastructure. We are also serving all requests from our own infrastructure in addition to any third-party cloud providers used for redundancy, ensuring high availability and eliminating single points of failure. Finally, the work has meaningfully improved performance and set a clear path for the removal of any reliance on third-party providers as redundant back-ups.

Workers KV is a global key-value store that Continue reading