标签：ext target imp write whatsapp data- max file slides
[Originally from the Post: System design interview: how to design a chat system (e.g., Facebook Messenger, WeChat or WhatsApp)]
Simple text based search with "AND" or "OR" support. E.g., give me all the tweets that have words "Black" AND "Life" in it sorted by published time in descending order.
search(api_dev_key, search_terms, maximum_results_to_return, sort, page_token)
A follow up question would be sort those results in other orders, E.g., give me all the tweets that have words "Black" AND "Life" in it sorted by the most commented tweets in descending order.
If the follow up question, we just need to build another index given the sort key or we could fetch the results on flight and sort (local optimal). Follow "Index -> Search -> Rank" steps.
Baozi Training System design interview: how to design a simple twitter search system
标签：ext target imp write whatsapp data- max file slides
原文地址：https://www.cnblogs.com/baozitraining/p/13176152.html
