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

Today, I would like to talk to you about the introduction of the data structure of Redis. Many people may not know much about it. In order to make you understand better, the editor has summarized the following contents for you. I hope you can get something according to this article.

Redis provides a persistence mechanism and data synchronization to avoid the avalanche after downtime, that is, when there is a problem with the server, all the original data retained in memory is lost and the data needs to be reorganized into memory. Memcached will go through a very slow process.

Redis supports persistence is only one of its weapons. In addition, it also provides as many as 5 data storage methods for different needs to achieve your needs with maximum efficiency. Let's talk about them separately:

1. String (string)

String is the simplest type, you can understand it as the same type as Memcached, one key corresponds to one value, and the operations supported on it are similar to those of Memcached. But it has more functions.

2. List (two-way linked list)

List is a linked list structure, and its main functions are push, pop, getting all values in a range, and so on. It is said to be bi-directional because it can be operated separately on the left and right sides of the linked list.

3. Dict (hash table)

Set is a set, which is similar to the concept of set in our mathematics, such as adding and deleting elements, intersection and difference of multiple sets and so on. Key is understood as the name of the collection in the operation.

4. Zset (sort set)

Zset is an upgraded version of set, which adds a sequence attribute to set, which can be specified when you add modified elements, and after each assignment, zset will automatically re-adjust the order to the new value. You can set the sort weight for the value of the specified key, and it applies more ranking modules.

5. Hash type

Redis can store key data on multiple attributes (such as user1.uname user1.passwd). Of course, you can store these attributes in json format and manipulate them directly as string types, but this has an impact on performance, so the Hash type proposed by redis.

After reading the above, do you have any further understanding of the introduction of Redis's data structure? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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