SUBSCRIBE
Subscribe to the given channels.
SUBSCRIBE channel [channel ...]
Complexity
O(c) channels; never fans out to other shards
Complexity and compatibility are read out of kevy's implementation, not copied from Redis's reference. Several genuinely differ.
Redis compatibility
Differs
kevy has no RESP2 subscriber mode — after SUBSCRIBE the connection may still issue any command, where Redis restricts it to the pubsub verbs plus PING / QUIT / RESET