Consistent Hash Ring

Consistent Hashing Ring is a special hashing algorithm primarily used for data distribution and load balancing in distributed systems. It maps the hash value space onto a ring structure, ranging from 0 to 2^32-1. This approach allows us to better handle node addition and removal while minimizing data migration. Basic Principles of Consistent Hashing Ring The core concept of consistent hashing ring is to visualize the entire hash value space as a circular structure with its ends connected, ranging from 0 to 2^32-1. In this circular space, we first need to distribute server nodes around the ring. Each server node is assigned a position on the ring through a hash function that calculates its hash value. When we need to store or retrieve data, we use the same hash function to calculate the data's hash value to determine its position on the ring. After determining the data's position, we move clockwise along the ring until we encounter the first server node, which becomes the storage loc ... Read full article.