Consistent hashing is a commonly used load balancing and distributed cache design technique that effectively distributes data across multiple nodes to achieve high performance and scalability. In this article, we will demonstrate how to implement a complete consistent hashing algorithm using PHP language and provide the corresponding source code.
Introduction to consistent hashing algorithm
The basic idea of the consistent hashing algorithm is to represent the entire hash space using a ring structure, and the nodes are evenly distributed on the ring. When a piece of data needs to be stored or queried, the hash value of the data is searched clockwise on the ring, and the first node found is the node to which the data belongs. This design method will only affect a small amount of data migration when nodes are added or deleted, thus ensuring the stability and scalability of the system.
PHP implements consistent hashing algorithm
The following is a complete example of a consistent hashing algorithm implemented in PHP language:
class ConsistentHash
{
private $nodes = []; // 存储节点的列表
private