# Design News Feed ### **What are the different approaches for sending News Feed contents to the users?** **1. Pull:** Clients can **pull** the News Feed contents from the server **on a regular basis** or **manually** **whenever** they **need** it. **Cons:** Possible problems with this approach are a) New data might not be shown to the users until clients issue a pull request b) Most of the time pull requests will result in an empty response if there is no new data. **2. Push:** Servers can push new data to the users as soon as it is available. To efficiently manage this, users have to maintain a [Long Poll](https://en.wikipedia.org/wiki/Push_technology#Long_polling) request with the server for receiving the updates. **Cons:** A possible problem with this approach is, a user who follows a lot of people or a celebrity user who has millions of followers; in this case, the server has to push updates quite frequently. **3. Hybrid:** We can adopt a hybrid approach. We can move all the users who have a high number of follows to a pull-based model and only push data to those users who have a few hundred (or thousand) follows. Another approach could be that the server pushes updates to all the users not more than a certain frequency, letting users with a lot of follows/updates to regularly pull data. ## Reference Gainlo.co: [Design News Feed System (Part 1)](http://blog.gainlo.co/index.php/2016/03/29/design-news-feed-system-part-1-system-design-interview-questions/) | [Design News Feed System (Part 2)](http://blog.gainlo.co/index.php/2016/04/05/design-news-feed-system-part-2/) --- # Agent Instructions: 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://aaronice.gitbook.io/system-design/system-design-problems/news-feed.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.