What are the key features of Redis?

Redis has many features that make it an attractive option for an application data store. Its penchant for performance makes it a favorite of developers. But there are several other additional points of functionality that make Redis unique.

Performance

The underlying idea behind Redis is very straightforward: to read and write as much data as possible in RAM. As the majority of the operations do not include disk or network I/O, Redis is able to serve data very quickly.

Tunable data durability

The underlying architecture that allows Redis to perform so well is that data is both stored and read from RAM. The contents of RAM can be persisted to disk with two different options:

• Via a forked snapshot process which creates an RDB file
• Using Append-only Files (AOF), which saves each write individually

While using the AOF option has a direct impact on performance, it is a trade-off that can be made depending on the use case and the amount of data durability that an application...