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1, String String is the most basic type of redis. A key corresponds to a value. String type can contain any data, including ordinary text data, pictures, video, audio, compressed files, etc. String type is the most basic data type of redis. The maximum string value in a redis is 512M. 1.1 SET: set value for string 1.1.1 command format S ...

brief introduction summary As a key/value data storage system, Redis provides a variety of data types to facilitate data management. Then, the data generated in our project is stored based on the specified type, such as user login information, shopping cart information, commodity details, etc. Common data types The basic data structures in ...

Several data types of redis 1. String 2. list 3. set 4. hash 5. Ordered set (zset) 1. String String type is the most basic data type in Redis. String can store any form of string, including binary data. The maximum capacity of data allowed to be stored in a string type is 512MB. set sets the value of the specified key Syntax: set key ...

The source code of this article comes from redis 6.2 link: https://github.com/redis/redis/tree/6.2 https://github.com/redis/redis/blob/6.2/src/sds.h https://github.com/redis/redis/blob/6.2/src/sds.c Introduction to sds sds (simple dynamic string) its full name is simple dynamic string. It uses C language to encapsulate a binary secure string ...

MongoDB's aggregate query is quite complex, but don't rush to persuade yourself. Remember to see that there are colored eggs in the end 1, What is the MongoDB Aggregation Framework MongoDB aggregation framework is a computing framework that can: Acting on one or more sets;A series of operations on data in a set;Convert these data into ...

summary The open source NoSQL database, the native graph database, was developed in 2003, using scala and java language, and was released in 2007;One of the most advanced graph databases in the world, which provides native graph data storage, retrieval and processing;The Property graph model is adopted to greatly improve and enrich the graph d ...

The functions and optimization principles of MongoDB index and MySql index are basically similar. MySql index types can be basically divided into:Single key index - Union indexPrimary key index (clustered index) - non primary key index (non clustered index)In addition to these basic classifications, there are some special index types in MongoDB ...

Introduction: NoSql, non relational database; Single thread + multiplex IO multiplexing technology Atomicity of Redis Because redis is single threaded, the execution of all single commands is atomic Applicable scenarios: Highly concurrent reading and writing of dataMassive data reading and writingFor high data scalability Key points: redis ...

1.ELK log analysis 1.1 advantages and disadvantages of log server advantage Improve security Centralized storage of logs shortcoming Difficult analysis of logs 2. What is elk? The management tool for simplified log analysis is composed of Elasticsearch(ES), Logstash and Kibana. The official website is: https://www.elastic.co/products E ...