Core algorithm and data structure of Infinispan Memcached Server

Core algorithm and data structure decryption of Infinispan Memcached Server Overview: INFINISPAN is an open source distributed cache and data grid platform, which provides high -performance and scalable cache functions.It uses the MEMCACHED protocol as an interface to communicate with the client.This article will explore the core algorithm and data structure of Infinispan Memcached Server framework to help readers better understand the working principle of the framework. 1. Algorithm analysis 1. Hash algorithm: INFINISPAN MEMCACACHED Server framework uses the consistency hash algorithm (Consistent Hashing) to achieve data storage and load balancing of data.This algorithm maps each data node to a position on a virtual ring, and determines the position of the data node by calculating the hash value.This data distribution method minimizes the cost of data migration under node increase or decrease or node failure. 2. Cache elimination algorithm: In order to ensure the effective use of the cache space, the Infinispan Memcached Server framework uses the LRU (Least Recently Use) algorithm for cache elimination.The algorithm determines whether the data is eliminated out of the cache based on the recent visit time of the data.When the cache space is insufficient, the data that has not been accessed will be preferentially eliminated. Analysis of data structure 1. Cleat storage structure: Infinispan Memcached Server framework adopts a distributed cache storage structure.The data is stored in the form of key value pair, where the keys and values can be any Java object.The framework uses the hash table to store the data. By map the key to a slot in the hash table to achieve fast storage and retrieval. 2. Distributed cache structure: INFINISPAN MEMCACACHED Server framework supports the distributed cache deployment of multiple nodes.Each node is responsible for storing and processing part of the data.The framework uses consistency hash algorithm to map the data node to a virtual ring, and determines the position of the data node through the hash value.This data distribution method realizes the balanced storage of data and fast search. Java code example: Below is a simple Java code example, demonstrating how to use the Infinispan Memcached Server framework for cache operation. import org.infinispan.client.hotrod.*; import java.util.*; public class InfinispanMemcachedExample { public static void main(String[] args) { // Create Infinispan Memcached Server client connection ConfigurationBuilder builder = new ConfigurationBuilder(); builder.addServer().host("localhost").port(11211); RemoteCacheManager cacheManager = new RemoteCacheManager(builder.build()); // Get the cache object RemoteCache<String, String> cache = cacheManager.getCache(); // Set the cache data cache.put("key1", "value1"); cache.put("key2", "value2"); // Get the cache data String value1 = cache.get("key1"); String value2 = cache.get("key2"); System.out.println("Value1: " + value1); System.out.println("Value2: " + value2); // Turn off the cache connection cacheManager.stop(); } } The above example code demonstrates how to store and retrieve the cache data through the Infinispan Memcached Server framework.First, establish a connection with the cache server by creating the RemoteCacheManager object.Then obtain the cache object through the getcache () method, and use the PUT () method to store the key value to the data to the data.Finally, get data from the cache through the get () method and print the result output. in conclusion: This article deepen the core algorithm and data structure of Infinispan Memcached Server framework.Readers can better understand and use the framework by understanding the consistency hash algorithm and cache elimination algorithm, as well as data storage and distributed deployment methods.I hope this article will be helpful to readers.