> For the complete documentation index, see [llms.txt](https://docs.natsclub.cn/cn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.natsclub.cn/cn/yi-chan/stan/intro/channels/subscriptions/durable.md). # ζŒδΉ…εŒ–ηš„ If an application wishes to resume message consumption from where it previously stopped, it needs to create a durable subscription. It does so by providing a durable name, which is combined with the client ID provided when the client created its connection. The server then maintains the state for this subscription even after the client connection is closed. ***Note: The starting position given by the client when restarting a durable subscription is ignored.*** When the application wants to stop receiving messages on a durable subscription, it should close - but *not unsubscribe* - this subscription. If a given client library does not have the option to close a subscription, the application should close the connection instead. When the application wants to delete the subscription, it must unsubscribe it. Once unsubscribed, the state is removed and it is then possible to re-use the durable name, but it will be considered a brand new durable subscription, with the start position being the one given by the client when creating the durable subscription. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.natsclub.cn/cn/yi-chan/stan/intro/channels/subscriptions/durable.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.