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

The editor in this issue will bring you an introduction to the data types of redis cache, analyze and describe it from a professional point of view. I hope you can get something after reading this article.

There are five Redis cache data types, namely String (string), List (list), Hash (hash), Set (unordered, do not repeat sets), and ZSet (sorted set: ordered, do not repeat sets).

String (string)

The string type is the most recent type of redis, and a key corresponds to a value.

The String type in Redis is binary-safe and can contain any data. Such as serialized objects or pictures.

The String type can store a maximum of 512m per key.

The assignment command for String type in Redis is SET, and the value command is GET.

List (list)

The Redis list type is a simple list of strings sorted in the order in which they are inserted.

Each List can store up to 232-1 elements (more than 4 billion).

The List type in Redis is assigned by the lpush command and the value is taken by the lrange command.

Set (unordered, do not repeat collections)

The set of Redis is an unordered collection of unordered and non-repeating collection types and String types.

Add elements to the collection through the sadd command, and the smembers command gets the collection.

The largest number of members in the collection is 232-1 (more than 4 billion).

Sorted set (ordered, non-repeating sets)

Ordered collections in Redis are ordered but the elements are not duplicated, ordered collections of type String.

Each element of zset is bound to a numeric value of type double, and the collection is sorted in ascending order. The values can be repeated, but the value values cannot be repeated.

Add an element to the collection through the zadd command, and update the corresponding double type value if the element already exists in the collection. Get the Sorted set collection elements through the ZRANGEBYSCORE command.

The above is the introduction of the data types of redis cache shared by Xiaobian. If you have similar doubts, it will not hinder your understanding with reference to the above analysis. If you want to know more about it, please follow the industry information.

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