add server to internal pool
list all running servers
get node for the key
get node for the key
remove a server
replace a server very useful when you want to replace a server in test mode to one in production mode
replace a server very useful when you want to replace a server in test mode to one in production mode
Use Case: Suppose I have a big list of key/value pairs which are replicated in 2 Redis servers - one having test values for every key and the other having production values for the same set of keys. In a cluster using replaceServer I can switch between test mode and production mode without disturbing the hash ring. This gives an additional level of abstraction on the node name decoupling it from the node address.