Shulou(Shulou.com)06/01 Report--

This article shows you what the persistence methods of Redis are, which are concise and easy to understand, which will definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

Redis is single-threaded, why so fast?

Based on memory, the vast majority of requests are purely memory operations, and CPU is not the bottleneck of Redis.

Avoid unnecessary CPU context switching and other competitive conditions, such as lock operations.

The underlying layer is the use of multi-channel Istroke O multiplexing model, non-blocking IO.

Multithreading is supported after Redis6, but it is not enabled by default.

What are the persistence methods of redis? tell the difference between them.

AOF and RDB persistence are supported.

AOF

Every write and delete operation processed by the server is recorded in the form of a log, and the query operation is not recorded and recorded in the form of text.

Support for second persistence and good compatibility. For the same number of data sets, AOF files are usually larger than RDB files, so recovery is slower than RDB.

RDB

When a snapshot of a dataset in memory is written to disk within a specified time interval, the data can be archived at a specified time, but cannot be persisted in real time.

The files are compact and small, so RDB is a very good choice for disaster recovery. Compared with the AOF mechanism, if the dataset is very large, RDB is faster than AOF in recovering large datasets.

What are the ways of persistence of Redis? have you learned any knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.

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