Redis Cluster: an interesting problem about moving hash slots around

In a cluster topology, the keyspace is divided into hash slots Different nodes will hold a subset of hash slots Multiple keys operations

For Redis use cases where you don't want to lose keys, you should only scale Your client must maintain a map of hash slots to the corresponding

redis hash slot When we moved everything else to the new serverless Redis, we started seeing a lot of errors in our logs The error was CROSSSLOT Keys in

redisexceptionsresponseerror_ crossslot keys in request don''t hash to the same slot When you encounter the “CROSSSLOT Keys in request don't hash to the same slot” error, it means that the keys you are using in your command are