Programming VIP

1. Gateway overview The so-called API gateway refers to the unified entrance of the system. It encapsulates the internal structure of the application and provides unified services for the client. Some public logic independent of the function of the business itself can be realized here, such as authentication, authentication, monitoring, ro ...

Knowledge premise Have a certain understanding of distributed scenariosTo understand the network domain name, you need to know that different URLs of primary or top-level domain names cannot share cookie s Environment construction Here, we create three spring boot projects, all with dynamic template thymeleaf, which is convenient for us to t ...

preface What is a distributed system? The emergence of distributed system is to complete the calculation that can not be completed by a single computer in a more cost-effective way and more ordinary machines. Four stages of architecture evolution Single application architecture Deploy all functions together to reduce deployment nodes and c ...

1. Operating system Deploy on Linux I/O modelData network transmission efficiency 1.1 I/O model level The I/O model is the method by which the operating system executes IO instructions. There are five types Blocking IONon blocking IOIO multiplexingSignal driven IOAsynchronous IO We can simply think that the latter model is more efficient ...

From the service gateway: Microservices series: introduction to Spring Cloud Gateway I've always learned about distributed transactions: Microservices series: distributed transaction Spring Cloud Alibaba's Seata practical chapter Today, we are finally going to end our micro service series. Not surprisingly, distributed logging will be the last ...

Write in front In today's Internet industry, especially in the current distributed and micro service development environment, in order to improve search efficiency and search accuracy, a large number of NoSQL databases such as Redis and Memcached will be used, as well as a large number of full-text retrieval services such as Solr and Elasti ...

zookeeper introduce zookeeper: provide coordination service for distributed framework, file system + notification mechanism Working mechanism The distributed service management framework designed based on the observer mode is responsible for storing and managing the data everyone cares about, and then accepting the registration of observers ...

As long as more than half of the nodes in the zookeeper cluster are normal, the whole cluster is available to the outside world. Based on this feature, it is more appropriate to set the number of nodes of ZK cluster to an odd number (2n+1: such as 3, 5 and 7 nodes). Server 1: 192.168.1.81 port: 2181, 2881, 3881 Server 2: 192.168.1.82 port: 218 ...

1, Meaning of cluster Cluster, cluster It is composed of multiple hosts, but externally, it is only shown as a whole. It only provides an access portal (domain name or IP), which is equivalent to a mainframe computer. 1. Why do clusters exist In Internet applications, as the site has higher and higher requirements for hardware per ...

Big data related knowledge points 1. Introduction to Kafka Kafka is a high-throughput distributed publish and subscribe message system. It can process all action flow data in consumer scale websites. It has the ability of high performance, persistence, multi copy backup and horizontal expansion Distributed system, easy to expand outward;At t ...