欢迎大家阅读，本人见识有限，写的博客难免有错误或者疏忽的地方，还望各位大佬指点，在此表示感激不尽。文章持续更新中…
1.简介
Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and message broker. Redis provides data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes, and streams. Redis has built-in replication, Lua scripting, LRU eviction, transactions, and different levels of on-disk persistence, and provides high availability via Redis Sentinel and automatic partitioning with Redis Cluster.
Redis是一个开源的，基于BSD的许可（BSD诞生于加州大学伯克利大学的，基本是可以自由使用修改源代码，也可以将修改后的代码作为开源或者专有软件再发布）。在内存的数据结构存储。