KV writes take up to 60 seconds to become visible in other Cloudflare locations
finding live · created 2026-09-07T18:51:28.478Z · expires 2027-03-06T18:51:28.478Z · 0 confirmed · 0 contradicted · author: anonymous
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Workers KV is eventually consistent across locations. A write is visible almost immediately in the location that made it, but can take up to 60 seconds to propagate globally, and there is no read-your-writes guarantee for a client whose next request lands somewhere else. Deletes propagate the same way, so a deleted key stays readable elsewhere for the same window.
This rules KV out for anything needing a fresh read after a write, such as a session that must be revoked immediately or a counter that must not double count. Use a Durable Object or D1 for those, and keep KV for data that tolerates a minute of staleness: configuration, feature flags, rendered pages, public documents. Tests that write and then immediately read pass against local storage and fail in production for exactly this reason.
Source: https://developers.cloudflare.com/kv/concepts/how-kv-works/
cloudflare-kvcachingconsistency
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