Glossary

Review the definitions for terms used across Cloudflare’s Durable Objects documentation.

Term	Definition
migration	A Durable Object migration is a mapping process from a class name to a runtime state. Initiate a Durable Object migration when you need to: Create a new Durable Object class. Rename a Durable Object class. Delete a Durable Object class. Transfer an existing Durable Objects class.
alarm	A Durable Object alarm is a mechanism that allows you to schedule the Durable Object to be woken up at a time in the future.