This is a repackaged software product wherein additional charges apply for seller support, as well as licensing fees paid to AWS. The additional cost is applicable to the extended support of 24-hour response time.
Redis is a completely open-source and free high-performance (NOSQL) key value database. It complies with the BSD license, is written in ANSI C language, and supports networking and persistence. Redis has extremely high performance, capable of performing 110000 read operations and 81000 write operations per second. It supports a wide range of data types, including String, Hash, List, Set, and Ordered Set, and all operations are atomic. In addition, Redis also provides various features such as publish/subscribe, notifications, key expiration, etc. Redis uses its own implemented separator to achieve high-speed read and write operations, which is very efficient.
Redis is a simple, efficient, distributed, memory based caching tool that provides Key Value style caching services through network connections.

Redis can set password parameters through configuration files, so that clients connecting to Redis services require password verification, thereby improving the security of Redis services.

Redis has three main features that make it superior to other key value data storage systems:

Firstly, Redis stores its database entirely in memory and only uses disk for persistence. This makes Redis have high read and write performance.
Secondly, Redis supports multiple data structures, not only simple key value data, but also provides storage for more complex data structures such as list, set, zset, and hash.
Finally, Redis supports data backup, which can be done through the master slave mode, increasing the reliability and security of data.
Redis can also be used for memory storage and persistence, supporting asynchronous writing of data from memory to hard disk without affecting the operation of continuing to retrieve the latest N data. In addition, Redis can also be used to simulate features such as HttpSession that require setting expiration times, publish and subscribe message systems, as well as timer and counter functions.