Shulou(Shulou.com)05/31 Report--

This article introduces the relevant knowledge of "how to quickly understand Redis". Many people will encounter such a dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. Redis is one of the most popular NoSQL databases. It is an open source, multi-data structure, network-based, memory-based, optional persistence key-value pair storage database written in ANSI C. By default, Redis is a cache store that is called for database use. It uses volatile memory to provide users with complete persistence options and support for other data types.

2. The application scenarios of Redis include: cache system, counter, message queue system, ranking, social network and real-time system.

3. Redis can use client API developed in all popular languages, such as C language, Ruby, Python, Java, JavaScript and so on.

4. Redis is famous for its persistence, and its relational database is backed up at specified intervals in the way of AOF, so as to take a point-in-time snapshot of the dataset and write the record.

5. If the server does not execute the command later, the Redis snapshot or Redis background save process will be involved, so when any instruction reported as a primitive in the random access memory (RAM) is in the disk snapshot, it will also be reported as a primitive.

6. In general, Redis can handle up to 2 ³²keys, that is, 2 ³²elements can be used when hash, list, set, and sorted set peak. In the actual test, each instance can handle at least 250 million keys. In other words, the limitation of using Redis is likely to be available memory in the machine / infrastructure.

7. In terms of always keeping data in memory, Redis has more read and write capabilities than conventional databases, which is one of the manifestations of its excellent performance and the reason why many developers choose it.

8. Redis stores data as key-value pairs, where some types of data structures act as keys. In addition, it allows objects to set the upper limit of their keys and values to 512 megabytes. This system of key hashing, which can be used to store key-value pairs, is called a Redis hash table.

9. The release of Redis 2.0 provides the function of data diffusion, and applies the subscription / publish messaging protocol, that is, the pub-sub model, which is very practical.

10, Twitter, Pinterest and Github, all use Redis projects, these are well-known large enterprises in the industry, you can imagine how good Redis is.

This is the end of "how to learn Redis quickly". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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