Programming VIP

Redis Master-slave + sentinel installation Pre-installation preparation 1. Machine preparation 5 sets 1 master node, 1 slave node The other three install one sentinel 2. Installation package preparation, version 3.2.9 3. Installation environment Check by command gcc-v that the following comma ...

Base environment System version: CentOS Linux release 7.5.1804 (Core) Kubernetes version: kubernetes 1.3 Project Background Guestbook message board system will be built through Pod, RC, Service and other resource objects, and a "Hello World" message will be displayed in the web page after successful launch.Its system architecture is ...

Preface In distributed systems, in order to improve system performance, individual projects are usually split into multiple function-based micro-services. If conditions permit, single micro-services may be scaled horizontally to ensure high availability of services. So the question is, what kind of problems will we encounter if we use the trad ...

In the interview about multi-threaded synchronization, you have to think about the question, we know that glibc pthread_cond_timedwait underlying is achieved by linux futex mechanism. The ideal synchronization mechanism should be to use atomic instructions to solve the problem in user mode without lock conflicts, and to sleep and wake up with ...

Persistence of Redis Persistence is to keep our data intact and to store it on our hard disk. There are two ways of persistence in Redis, one is snapshot persistence, the other is AOF persistence, each has its own advantages and disadvantages, in the project we have to choose the specific persistence ...

Installation of ScrapySplash ScrapySplash is a tool in Scrapy that supports JavaScript rendering. This section describes how it is installed. The installation of ScrapySplash is divided into two parts. One is the installation of Splash service. The installation mode is through Docker. After installati ...

General Introduction Single sign-on system (SSO) is one of the most popular solutions for business integration in enterprises.SSO is defined as multiple applications in which users only need to log in once to access all mutually trusted applications.Any SSO framework needs to create a unified certification center! Solve the problem ...

A list that adds additional forward pointers to an ordered list is called a skip list. It uses random technology to determine which nodes in the list should add forward pointers and how many pointers should be added. Based on this stochastic technique, the average time complexity of finding, inserting a ...

Reprint address: https://www.cnblogs.com/zeng1994/p/03303c805731afc9aa9c60dbbd32a323.html SpringBoot integrates many Redis blogs, but many of them are not the results I want. Because I just need to integrate, I can operate Redis, and I don't need to use it with caching-related annotations (such as @ ...

What is Swoft? Swoft It's based on Swoole Extend the implementation of the PHP Microsoft Services Consortium Framework. Like Go, Swoft has built-in protocol network servers and commonly used protocol clients and resides in memory, independent of traditional PHP-FPM. There are cooperative operation modes similar to Go language, flexible annotati ...