Programmer Group

This post is a reference Lepus Official Documentation The official documentation was detailed, but some download links failed (maintainers of this open source product are busy, so updates are not timely) and the use of lepus was documented for their own writing style, so this post appeared. The Lepus system features are as follows: Remote mo ...

PV introduction PV (Page View) is the number of clicks. Generally speaking, PV is the main indicator to measure a network news channel or website or even a network news. PV's explanation is as follows: a visitor looks at several pages of the website in 24 hours (0:00-23:00). It should be noted that the same person browsing the same page of th ...

Table of contents structure of this article Scenario description Using code replication to solve the problem step by step Repetition problem Thinking about expanding problems Scenario description A product line is too laggy around January (end users 5W or so). When a customer manager feedback to ...

background The System tps is 3000, distributed deployment is adopted, and the business order number needs to be globally unique, such as order number. There are many common distributed global id schemes on the Internet, including the following: UUID redis atomic self increasing zookeeper node directo ...

How is Seesion used in C + + server? The two mechanisms of cookie and session are introduced and used in the official account (CPP background server public view), but it seems that we seldom encounter in the C++ background development process. How is session used in our server? First, let's look ...

This paper mainly introduces the process that Flink reads Kafka data and sinks (Sink) data to Redis in real time. Through the following link: Flink official documents , we know that the fault tolerance mechanism for saving data to Redis is at least once. So we use idempotent operation and the principle ...

Article directory Data type of redis 1: String: 1.1 add a key: 1.2 get the content of a key: 1.3 view the type of a key 1.4 set the automatic key expiration time 1.5 delete a key 1.6 batch setting multiple key s: 1.7 additional data 1.8 numerical increment 1.9 numerical decrement 1.10 return strin ...

Using spring boot + mybatis + RabbitMQ + redis to simulate the second kill function of the mall First, we need to install RabbitMQ. Before installing RabbitMQ, we need to install Erlang, because RabbitMQ is based on Erlang. For specific steps, click the following link: After installation, RabbitMQ i ...

Preface In Web application development, security has always been a very important aspect. In the huge spring ecosystem, the authority verification framework is also very perfect. Among them, spring security is very easy to use. Today, I'd like to record a spring security related problem encountered in development. Problem description When using ...

Article directory Preface I. environment 1.1: Environment 1.2: purpose of the experiment 2: Experimental process 2.1: deployment of Redis from master-slave server 2.2: master-slave server configuration file modification 2.3: install rvm and RUBY control cluster software on the main server 2.4: th ...