Author: Zen and the Art of Computer Programming
1 Introduction
Memcached and Redis are both open source in-memory databases that can be used for caching, but there are many differences between them. This article will explain some of the differences between the two.
Memcached and Redis are currently the two most popular in-memory data storage systems based on key-value storage. They are used to quickly process simple data, such as strings, hash tables, lists, etc., and can also be used to store complex structured data, such as objects and collection types.
The main purpose of Memcached is to cache data quickly in a distributed environment and supports a variety of data structures. It is suitable for data that is not accessed frequently in the short term but will be accessed with high concurrency in the long term. Redis is more suitable for storing persistent data, and is suitable for data that needs to be saved and queried at high speed, such as user information, product orders, etc.
2. Explanation of basic concepts and terms
2.1 Memcached Overview
Memcached is a high-performance memory key-value store, which is a memory-based caching technology. It is very fast and can handle more than 100 million read and write operations per second. Memcached provides simple data structures, including strings, integers, floating point numbers, binary data and arrays. Memcached is open source and released under the BSD license.
2.2 Redis Overview
Redis is another high-performance in-memory key-value database. It supports a variety of data types, including string (string), hash (hash), list (list), set (collection) and zset (sorted set: sorted set). redis is very fast and can process