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Libevent is a set of lightweight network library, which is based on event driven development. It can realize multi-threaded multiplexing and register event response. This article introduces the basic functions of libevent and how to develop a thread pool with libevent. 1, Use guide Listen for service and register connection events Libevent is a ...

Dubbo supports load balancing algorithm for service providers in service callers. The LoadBalance interface is defined as follows: @SPI(RandomLoadBalance.NAME) public interface LoadBalance { /** * select one invoker in list. * * @param invokers invokers. * @param url refer url * @param invocation invocation. * @return selected in ...

4.Hystrix Fuse 4.1 Introduction Hystrix is an open source delay and fault tolerant library for Netflix that isolates access to remote services and third-party libraries to prevent cascading failures. Call alternatives when access times out 4.2 Getting started with Hystrix Step 1: Import pom dependencies Step 2: Turn on the Hystrix m ...

This article starts with vivo Internet technology WeChat public. Links: https://mp.weixin.qq.com/s/LGLqEOlGExKob8xEXXWckQ Author: Qian Xingchuan In the distributed environment, we often define the data distribution through certain rules. The modulus algorithm and Consistent Hash described in this paper generate a key through certain rules ...

concept Function: improve throughput, request performance and disaster recovery Load balancing is divided into four layers: ip+tcp port; seven layers: http layer, such as scheduling according to host address Implementation principle: nginx uses the core configuration of proxy pass proxy module to realize load balancing, and ...

Links to the original text Cluster in Dubbo can disguise multiple service providers as one provider, that is, to disguise multiple Invokers in Directory as an Invoker, which includes fault tolerant processing, load balancing processing and routing processing. This article introduces the cluster related things. First, it explains the concepts of ...

We analyze what Dubbo's call process is like based on the case on the official website 1. Paste the call source first public static void main(String[] args) throws Exception { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"META-INF/spring/dubbo-demo-consumer.xml"}); context.start(); ...

order This article mainly studies the TransportProxyClient of elasticsearch. TransportProxyClient elasticsearch-6.4.3-sources.jar!/org/elasticsearch/client/transport/TransportProxyClient.java final class TransportProxyClient { private final TransportClientNodesService nodesService; private final Map<Action, TransportActionNodeProxy& ...

In cluster load balancing, Dubbo provides a variety of balancing strategies, defaulting to random random random calls. We can also expand our responsible balance strategy if you've changed from a little white to a big bull. 1,Random LoadBalance 1.1 Random, set random probability according to weight. 1.2 The probability of collision on a cross s ...