Redis Clusterについて

The CLUSTER SETSLOT command is an important piece used by Redis Cluster in order to migrate all the keys contained in one hash slot from one node to another

Redis Clusterについて Features · Calculate key slot based on the Redis hash slot algorithm · Interrogates a Redis Enterprise cluster via REST API to determine the node assignment for a

The CLUSTER SETSLOT command is an important piece used by Redis Cluster in order to migrate all the keys contained in one hash slot from one node to another

new slot site hash slot Redis assigns keys to nodes by calculating the hash slot like this: Page 2 CRC16 mod 16384 CRC16 is a hashing function ( , converts a

If the command is successful, the node will map the specified hash slots to itself, and will start broadcasting the new configuration However note that: The

redisexceptionsresponseerror_ crossslot keys in request don''t hash to the same slot Returns the number of keys in the specified Redis Cluster hash slot The command only queries the local data set, so contacting a node that is not serving

So how are keys related to slots? These slots are actually hash slots, in which each key is put through a hashing function to mathematically