why Redis is single threaded(event driven)

Question

I am trying to understanding basics of Redis. One that that keep coming everywhere is, Redis is single threaded that makes things atomic.But I am unable to imagine how this

Answer 1

The correct answer is Carl's, of course. However.

In Redis v4 we're seeing the beginning of a shift from being mostly single threaded to selectively and carefully multi threaded. Modules and thread-safe contexts are one example of that. Another two are the new UNLINK command and ASYNC mode for FLUSHDB/FLUSHALL. Future plans are to offload more work that's currently being done by the main event loop (e.g. IO-bound tasks) to worker threads.