# Consistent Hash Consistent Hashing is a distributed system algorithm for assigning values to partitions in a highly dynamic environment. ## Example: Using the algorithm to LB redis cache. (Crate `redis = "0.17.0"`). While the key must implement the hash trait to define a hashing strategy. The Value must implement the Evict trait to define rebalancing behavior. ```rust let mut ring: ConsistentHash = match ConsistentHash::new(100).unwrap(); ring.add_node("redis://my-redis-node-1".to_string(), redis::Client::open("redis://my-redis-node-1")?).unwrap(); ring.add_node("redis://my-redis-node-2".to_string(), redis::Client::open("redis://my-redis-node-2")?).unwrap(); ring.add_node("redis://my-redis-node-3".to_string(), redis::Client::open("redis://my-redis-node-3")?).unwrap(); ring.add_node("redis://my-redis-node-4".to_string(), redis::Client::open("redis://my-redis-node-4")?).unwrap(); let client = match ring.get_node(String::from("some-key")){ Some(node) => node, None => panic!("Not found!"), }; let mut con = client.get_connection()?; con.get("some-key"); ```