Concepts

Every Durable Object runs in the one local workerd. idFromName / newUniqueId still mint stable IDs. get(id, { locationHint: "wnam" }) accepts a legal hint but does not schedule the object into another region — a second colo is not provided.

jurisdiction("eu") is likewise encoded into the ID with no geographic isolation effect.

Each object has its own storage (KV + SQL). SQL cannot see the platform-internal alarm table.

Alarms

See Alarms. getAlarm / setAlarm / deleteAlarm and the alarm() handler are supported. Scheduling still happens on this node.

WebSocket hibernation

state.acceptWebSocket, webSocketMessage / webSocketClose / webSocketError, tags, and attachment serialize/deserialize are supported. Runtime details: WebSockets. The object still lives on this one workerd. Cross-edge hibernation migration is not provided.

The Durable Objects API for namespace / stub / storage / RPC / hibernation / alarms matches Cloudflare.

Compatibility

Topic	Cloudflare	open-compute
API	Durable Objects API	Same: namespace / stub / storage / RPC / hibernation / alarms
Placement	Geographic scheduling	One local workerd; location hints and jurisdiction do not change placement