How Redis Cluster Maintains Availability while Re-Sharding

How Redis Cluster Maintains Availability while Re-Sharding redis hash slot A hash tag is defined with brackets a key that has a substring inside brackets will use that substring to determine in which hash slot the redis hash slot hash slot Redis assigns keys to nodes by calculating the hash slot like this: Copy CRC16 mod 16384 CRC16 is a hashing function (

redis hash slot The entire keyspace in Redis Clusters is divided in 16384 slots and these slots are assigned to multiple Redis nodes

redis slot Returns the number of keys in a hash slot  Each time there is a failover, a new, unique, monotonically increasing configuration epoch is created If multiple nodes claim to serve the same hash slots, the