Programming VIP

Technical research background As the current R & D team is in the start-up stage of the company, there is no mature operation and maintenance system, and the ability to build and maintain the mature MQ commonly seen in the market is insufficient. However, we hope to have a lightweight message system for the members of the R & D team. T ...

1, Explain Although there are many things that can be done by scratch, it is difficult to achieve large-scale distributed applications. Someone has changed the queue scheduling of the sweep and changed the starting URL from start_ It is separated from URLs and read from redis instead. Multiple clients can read the same redis at the same time, ...

Introduction, construction and simple use of Hadoop framework Zookeeper Introduction to Zookeeper    Zookeeper is an efficient distributed coordination service, which can provide configuration information management, naming, distributed synchronization, cluster management, database switching and other services. It is not suitabl ...

Learning from sentinel Leader election and implementation of Raft protocol (Part 2) In the last article, I introduced you to the basic process of Raft protocol and the basic process of sentinel instance work. The Sentinels perform periodic execution through the serverCron function, and then call the sentinelTimer function in serverCron to real ...

1, Node At the beginning, each Redis instance is A cluster itself. The work of connecting each node is completed through the CLUSTER MEET command. After A and B shake hands, A will spread B's information to other nodes in A's cluster through the Gossip protocol, so that other nodes can also shake hands with B; // Cluster nodes struct cluster ...

Deep dive kafka producer - Core Architecture 3. Deep dive KafkaProducer infrastructure kafka has customized a set of network protocols, which can be implemented in any language to achieve the effect of pushing messages to and from kafka clusters. The clients module in the source code of kafka version 2.8.0 is the official default imple ...

Original website: brief introduction This paper introduces the snowflake algorithm in distributed. Including: usage and principle. The snowflake algorithm is used to generate a globally unique ID. Principle of snowflake algorithm Snowflake, snowflake algorithm, is a distributed ID generation algorithm open source by Twitter. Project websit ...

This article mainly explains the knowledge of distributed request link tracking Sleuth in spring cloud. Reference article: https://www.yuque.com/sunxiaping/yg511q/xc44uq Problems under microservice architecture In the microservicing construction of large-scale systems, a system will be divided into many modules. These modules are responsi ...

1. Introduction to Nginx 1.1 what is Nginx nginx Chinese documents: https://www.nginx.cn/doc/ Nginx is a high-performance Http and reverse proxy web server that provides IMAP/POP3/SMTP services Nginx features less memory, strong concurrency, simple installation and concise configuration files 1.2 reverse proxy Forward proxy: configu ...

Synchronized is called implicit Lock, also known as JVM Lock, because it holds and releases locks implicitly without developer intervention. Java 1.5 introduces a new locking mechanism, in which the implementation of the Lock is based on the Lock interface: public interface Lock { // Lock void lock(); // Unlock void unlock(); // The lock ...