Redis can be used for caching, which is very effective in improving server performance; redis can also be used for rankings, which can be easily achieved using the SortSet data structure of Redis; redis can also be used as a "calculator/speed limiter", etc. .
What can redis do?
1. Caching, there is no doubt that this is the most well-known usage scenario of Redis today. It is very effective in improving server performance;
2. Ranking list. If you use a traditional relational database to do this, it will be very troublesome, but using the SortSet data structure of Redis can be very convenient;
3. Calculator/speed limiter, using the atomic auto-increment operation in Redis, we can count the number of user likes, user visits, etc. If MySQL is used for such operations, frequent reading and writing will cause This brings considerable pressure; a typical usage scenario of the speed limiter is to limit the frequency of a certain user accessing a certain API. It is commonly used during rush sales to prevent users from unnecessary pressure caused by crazy clicking;
Note : The rate limiter is also a way to implement request current limiting.
4. Friend relationship, using some commands of collection, such as intersection, union, difference set, etc. It can easily handle functions such as mutual friends and common hobbies;
5. Simple message queue, in addition to Redis's own publish/subscribe mode, we can also use List to implement a queue mechanism, such as: arrival of goods Requirements such as notifications and email sending do not require high reliability, but will bring a lot of DB pressure. List can be used to complete asynchronous decoupling;
6. Session sharing, the default Session is saved in In the server's file, that is, the current server, if it is a cluster service, the same user may land on different machines, which will cause users to log in frequently; after using Redis to save the Session, the user can obtain it no matter which machine he lands on. to the corresponding Session information.
The above is the detailed content of What can redis do?. For more information, please follow other related articles on the PHP Chinese website!

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.

In PHP, use the clone keyword to create a copy of the object and customize the cloning behavior through the \_\_clone magic method. 1. Use the clone keyword to make a shallow copy, cloning the object's properties but not the object's properties. 2. The \_\_clone method can deeply copy nested objects to avoid shallow copying problems. 3. Pay attention to avoid circular references and performance problems in cloning, and optimize cloning operations to improve efficiency.

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SublimeText3 English version
Recommended: Win version, supports code prompts!

SublimeText3 Chinese version
Chinese version, very easy to use

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool