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This article mainly introduces how to use nsq in nodeJs, and other implementations will be output in subsequent articles. cause Some time ago, I made a node service to generate pdf from web pages. In the process of generating puppeter and canvas, the consumption of memory is relatively large, the generation time of pages with large internal cap ...

Detailed production-level load balancing algorithm Introduction to load balancing Load Balance, the English name for Load Balance, refers to a collection of servers that are symmetrically composed of multiple servers, each of which has an equivalent status and can be served independently without the assistance of other servers.With a load-sh ...

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 ...