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We know that nginx was only used for http load balancing, while TCP and UDP used lvs or haproxy for load balancing, but both of them need to be bound with logical addresses. So the problem is that public virtual machine cannot be bound with logical addresses, so we can only use SLB provided by alicloud, so there will be two problems. 1. Spend ...

background Read the fucking source code!--By Luxun A picture is worth a thousand words. --By Golgi Explain: Kernel version: 4.14 ARM64 Processor, Contex-A53, Dual Core Use Tools: Source Insight 3.5, Visio 1. Overview Completely Fair Scheduler, a fully fair scheduler, is used to schedule ordinary processes in Linux systems. CFS uses a r ...

When a node in the cluster suddenly goes down, if the partition on the node is a single replica, then these partitions will become unavailable; if it is a multi replica, then the leader replica on this node will change to the corresponding follower replica. In a word, if the node goes down, the partitio ...

No matter in the early load balancer or in the current client based load balancing of microservices, there is a basic polling algorithm, that is, requests are evenly distributed to multiple machines. Today, I will talk about how kube proxy implements the core data structure of affinity polling. I will learn about the implementation of affinity ...

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 ...