Programmer Group

Title Description: Title portal Problem solving ideas: According to the meaning of the question, this question is to select several points on a tree to maximize the point weight, in which the selected points meet two conditions: If the parent node is selected, the child node cannot be selectedIf a child node is selected, the parent node c ...

Anomaly detection: from classical algorithms to deep learning 0 IntroductionAnomaly detection algorithm based on isolated forest 2 anomaly detection algorithm based on LOF3 anomaly detection algorithm based on one class SVM4 anomaly detection algorithm based on Gaussian probability density5 Opprentice -- the final chapter of classical algorith ...

Introduction: Theoretically, we can also manually create an SSL security certificate, but the security certificate issued by ourselves is trusted by the browser, so we need the security certificate issued by the trusted certificate authority (CA). The general SSL security certificate issuing service requires payment and is expensive. However, ...

It is convenient to integrate common NO SQL with Springboot following the principle of "convention is greater than configuration". This example makes a simple demo with redis, using Redis's set and get commands. Introduce dependency packages for redis. <dependency> <groupId>or ...

It is convenient to integrate common NO SQL with Springboot following the principle of "convention is greater than configuration". This example makes a simple demo with redis, using Redis's set and get commands. Introduce dependency packages for redis. <dependency> <groupId>or ...

In order to improve the performance of the website, we can adopt the load balancing cluster scheme and the read-write separation. My previous blog described the configuration of WTM framework Separation of reading and writing , now we continue to build a load balancing cluster based on the previous ...

1. Install the corresponding compilation tools In the root user (do not use ordinary users, trouble), all copy and paste in the past, a one-time installation yum -y groupinstall "Development tools" yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel ...

1, Pre knowledge points 1.1 two ways to deploy Kubernetes cluster in production environment At present, there are two ways to deploy Kubernetes cluster in production: kubeadm Kubeadm is a K8s deployment tool that provides kubeadm init and kubeadm join for rapid deployment of Kubernetes clusters. Official address: https://kubernetes.io ...

preface: In view of the need for home-based work during the epidemic, remote work is necessary. At present, the simplest way is to realize it through the direct port mapping of the company's route, but there are inevitably security risks, For this reason, the editor temporarily decided to build openvpn to realize this function. Speaking of ope ...

Recently, more than 10 secondary domain names of individuals need to issue certificates. Let's Encrypt provides free SSL certificates with a term of three months. When they expire, they need renew. The official also provides certbot, a tool for automatic renew. Here, we record the general certificate that uses Let's Encrypt to generate t ...