What type of database is redis?

Redis is an open source log-type Key-Value database written in ANSI C language, supports network, can be memory-based and persistent, and provides APIs in multiple languages.

redis is a NoSql (not only sql, not just sql) type database, also known as a non-relational database.

Non-relational databases store data in the form of Key-Value, and the data is stored in memory, which may be a disadvantage. Since the memory size of Redis itself is only 1G and the practical use is only 0.75G, we need to provide additional servers to support it. (Recommended learning: Redis video tutorial)

Advantages and disadvantages:

①Redis saves data in the form of Key-Value, so we only It is necessary to use Key to retrieve data and Key-Value to save data. The time complexity is O(1). The read and write performance is excellent.

② Supports rich data structures, common data structures such as List, String, Set, Hash, etc.

③ Supports data persistence, supports AOF and RDB persistence methods

For more redis-related technical knowledge, please visit the Redis usage tutorial column to learn!

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