Redis is a very popular NoSQL database used as a Cache based on the KV structure.
Introduction to Redis
Remote Dictionary Server (Redis) is an open source Key-Value database written in ANSI C language, supporting the network, memory-based or persistent. Key character type, its value (value) can be a string (String), ha There are several types such as Map, list, sets and sorted sets. Each data type has its own unique commands. So it is usually called a data structure server.
The author of Redis is Salvatore Sanfilippo, from Sicily, Italy, and now lives in Catania. Currently working for Pivotal (Pivotal is the development team of the Spring framework), Salvatore Sanfilippo is known as the father of Redis.
Father of Redis (Salvatore Sanfilippo)
Official website: https://redis.io/
Chinese: http://www.redis.cn/
The history of Redis:
In 2008, an Italian startup company Merzia launched a MySQL-based real-time statistics system for websites LLOOGG. However, it didn’t take long for the company’s founder Salvatore Sanfilippo to become disappointed with the performance of MySQL, so he decided to personally tailor LLOOGG. A customized database was developed and completed in 2009. This database is Redis.
However, Salvatore Sanfilippo was not satisfied with using Redis only for LLOOGG, but wanted to let more people use it. So in the same year, Salvatore Sanfilippo released Redis as an open source, and started another major code with Redis. Contributor Pieter Noordhuis continues the development of Redis together until today.
Salvatore Sanfilippo himself did not expect that in just a few years, Redis would have a huge user base.
The 2012 database usage survey showed that nearly 12% of companies are using Redis. Domestic users such as Sina Weibo and Zhihu, and foreign countries such as GitHub, Stack Overflow, Flickr, Blizzard and Instagram are all users of Redis.
VMware has sponsored the development of Redis since 2010. Salvatore Sanfilippo and Pieter Noordhuis also joined VMware in March and May of the same year to develop Redis full-time.
Redis's code is hosted on GitHub https://github.com/antirez/redis, and the development is very active, with only more than 30,000 lines of code.