A consensus algorithm that distributed systems must know: Raft

1. Overview of Raft The Raft algorithm is the preferred consensus algorithm for distributed system development. For example, Etcd and Consul are popular now. If you master this algorithm, you can easily handle the fault tolerance and consistency requirements of most scenarios. For example, distributed configuration systems, distributed NoSQL storage, etc. can easily break through the single-machine limitations of the system. The Raft algorithm achieves consensus on a series of values ​​and consistency in the logs of each node through all leader-based methods. 2. Raft Role 2.1 Role Follower (Follower): Ordinary people, silently receiving messages from the leader, when the leader’s heartbeat information times out

How to use nodejs to build an online job search platform

With the popularity of the Internet, online recruitment has become one of the main channels for job seekers and recruiting companies. With the development of technology, more and more job search platforms have appeared on the market. In the process, Node.js has become a very popular open source platform that is fast, cross-platform, and easy to write and modify. In this article, we will create an online job search platform using Node.js. First, we need a database to store job seeker and company information. In this regard, we can use MongoDB, which

How to perform database query in nodejs

Node.js is a JavaScript running environment based on the Chrome V8 engine that can be used to develop web applications. One of the main advantages of Node.js is its non-blocking I/O mode, which makes it ideal for request-responsive applications. Of course, another important advantage of Node.js is that it supports database query operations. In Node.js, several different databases can be used to store data. Common databases include: MySQL, MongoDB, PostgreSQ

An in-depth analysis of how to use Node.js to simulate requests to a local database

Node.js is an open source, cross-platform Javascript running environment built on the Chrome V8 JavaScript engine. It can run on Windows, Linux, macOS and other operating systems. It is a very popular back-end development tool. Node.js provides many modules and APIs that can be used to create server applications and perform file system operations. In this article, we will discuss how to simulate requests to a local database using Node.js. In Node.js, we can

ChatGPT is beginning to threaten programmers' core capabilities!

The more critical question is how to identify whether its answer is correct. I now have the standard answer on hand and can evaluate it. In actual projects, we are faced with unknowns. If we have no experience, how do we know that the design given by GPT-4 is effective? Can it solve the problem?​ ​ChatGPT is a good helper for programmers? Or do you want to kill the programmers? I think it’s not only about its ability to generate code, but more importantly, whether it has strong design capabilities. There are two levels of design capabilities. One is high-level, such as architecture design and system design. One is relatively low-level design capabilities, mainly designing specific classes and interfaces. Today we take a look at how it performs in these two aspects. Since ChatGPT's answer is particularly long-winded, I will delete one.

Let's talk about different ways to save data using Golang

How to use Golang to save data As the Go language becomes increasingly popular, many developers use Golang for development in projects. One of the important questions is how to save the data. In this post, we will discuss different ways to save data using Golang. 1. Use JSON JSON is a lightweight format for data exchange. In Golang, we can use the `encoding/json` package to encode data from a structure into JSON formatted data. We can also use `json.

How does PHP use Lua to achieve read and write consistency issues?

With the gradual development of web applications, the technologies used in web interfaces are becoming more and more diversified. Of course, PHP continues to play an important role as a classic server-side scripting language. In PHP applications, sometimes you need to perform a complex business operation, which may include multiple database read and write operations. In order to improve performance and efficiency, technologies such as caching need to be used for optimization. Currently in PHP applications, the most common read and write optimization solution is to use Memcache. Using Memcach in PHP applications

What are the methods for php interface optimization?

What are the Linux distributed file systems?

Linux distributed file systems include: 1. OpenAFS, which is an open source distributed file system; 2. MooseFs, which is a network distributed file system with fault tolerance; 3. googleFs, which is an scalable distributed file system. system etc.

What is the abbreviation of sno in the database?

In the database, sno is the abbreviation of "student number", "cno" is the abbreviation of course number, "sdept" is the abbreviation of department name, "cpno" is the abbreviation of prerequisite courses, and "ccredit" is the abbreviation of credits; the database is organized according to the data structure. A warehouse that stores and manages data is a collection of large amounts of data that is stored in a computer for a long time, is organized, shareable, and unified management.

What are the differences between nosql and mysql

Differences: 1. MySQL is a relational database, while NoSQL is non-relational. 2. MySQL’s strict mode restrictions are not easy to expand, while NoSQL is easy to expand. 3. MySQL requires a detailed database model before creating a database, which is not required in NoSQL. 4. MySQL provides a large number of reporting tools, but nosql does not. 5. Compared with MySQL, NoSQL provides a more flexible design. 6. The standard language used in MySQL is SQL, while NoSQL lacks a standard query language.

Let's talk about how to operate MySQL in Node project

How to operate MySQL in Node project? The following article will talk to you about several SQL statements for managing databases, and introduce how to operate MySQL in Express projects. I hope it will be helpful to you!

What does php static mean?

PHP staticization is to make the website-generated pages displayed in front of visitors in the form of static HTML; PHP staticization is divided into pure staticization and pseudo-staticization. The difference between the two lies in the different processing mechanisms for PHP to generate static pages. Pure staticization is to save the dynamic page generated by PHP into a static html file. The user accesses the static page instead of regenerating the same web page every time the user visits, which can reduce server overhead. Pseudo-static refers to converting the URL address of a dynamic page into a URL address similar to a static page to facilitate inclusion by search engines.

Systematic explanation of PHP caching technology

This article brings you relevant knowledge about PHP, which mainly introduces the relevant content of caching technology. Caching has become an indispensable part of the project and is the best way to improve performance. Let’s take a look at it together. I hope everyone has to help.