I've implemented a subset of redis in the past, and went by their official docs, first the protocol[1] level protocol, then the docs for individual comments suc

I've implemented a subset of redis in the past, and went by their official docs, first the protocol[1] level protocol, then the docs for individual comments such as SET[2]. They also have a test suite, and I extracted the bits that applied to my partial implementation from there. The only real pitfall was what part of the CONFIG stuff I needed to implement to make popular redis client libs talk to me and/or use the newer protocol features. The rest was pretty straight forward, just read the docs for a command, implement the stuff, run the test suite, fix any bugs, repeat. As far as I know there is no RFC let alone an ISO standard. [1] https://redis.io/topics/protocol https://redis.io/topics/protocol [2] https://redis.io/commands/set https://redis.io/commands/set