Network latency is also a factor when interacting with a cache and not an extra cost of interacting…

…roblems with relatively high latency. If the data volume is huge, the query speed will become slow. Moreover, database queries involve network communication between the application server and the database server. The time required for establishing connections, sending queries, and receiving responses also cause…

Interview: How to Check Whether a Username Exists Among One Billion Users?

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Dylan Smith