Is Redis' set command an atomic operation?

Question

I'm trying to use Redis' set command to implement a simplest distributed lock component, but I can't find any exact basis about atomicity through the official document, is Redis' SET key value [EX seconds] [PX milliseconds] [NX|XX] command an atomic operation?

Answer 1

Yes. The core is single threaded, so nothing will run until the SET has completed; that makes SET {key} {value} EX {expiry} NX ideal for simple locking.