一. thread-per-connection The thread-per-connection approach uses an exclusive worker thread for each connection. Within the handling loop, a worker thread waits for new incoming data, processes the request, returns the response data, and calls the bl…

本文翻译自 Jakob Jenkov 的 Java NIO: Non-blocking Server ,原文地址:http://tutorials.jenkov.com/java-nio/non-blocking-server.html 文中所有想法均来自原作者,学习之余,觉得很不错,对以后深入学习服务器有帮助,故翻译之,有错误还望指教 Non-blocking Server 即使了解 NIO 非阻塞功能如何工作(Selector,Channel,Buffer等),设计非阻塞服务器仍然很难. 与…

Even if you understand how the Java NIO non-blocking features work (Selector, Channel, Buffer etc.), designing a non-blocking server is still hard. Non-blocking IO contains several challenges compared blocking IO. This non-blocking server tutorial wi…

Architecture of a Highly Scalable NIO-Based Server Scalable IO in Java Tricks and Tips with NIO part II: Why SelectionKey.attach() IO trick and trap NIO的技巧与陷阱.原文 Nio框架需要注意的两个问题(2).- . 谈谈java selector的机制. NIO编程框架. Java NIO 常见问题以及建议. 高性能聊天系统. Reactor模式…

高吞吐高并发Java NIO服务的架构(NIO架构及应用之一) http://maoyidao.iteye.com/blog/1149015   Java NIO成功的应用在了各种分布式.即时通信和中间件Java系统中.证明了基于NIO构建的通信基础,是一种高效,且扩展性很强的通信架构. 基于Reactor模式的高可扩展性架构这个架构的基本思路在“基于高可用性NIO服务器架构”(http://today.java.net/pub/a/today/2007/02/13/architecture-o…

Design a Scalable System Design a system that scales to millions of users (AWS based) Step 1: Outline use cases and constraints Gather requirements and scope the problem. Ask questions to clarify use cases and constraints. Discuss assumptions. Use ca…

Cross-domain security for data vault is described. At least one database is accessible from a plurality of network domains, each network domain having a domain security level. The at least one database includes at least one partitioned data table tha…

Open source software has become a fundamental building block for some of the biggest websites. And as those websites have grown, best practices and guiding principles around their architectures have emerged. This chapter seeks to cover some of the ke…

转自:http://aosabook.org/en/distsys.html Scalable Web Architecture and Distributed Systems Kate Matsudaira Open source software has become a fundamental building block for someof the biggest websites. And as those websites have grown,best practices and…

public class ReactorDemo { public static void main(String[] args) throws IOException { ServerSocketChannel ssc = ServerSocketChannel.open();//管道型ServerSocket ssc.socket().bind(new InetSocketAddress("127.0.0.1", 8089)); ssc.configureBlocking(fals…

This article is from blog of Amazon CTO Werner Vogels. -------------------- Today is a very exciting day as we release Amazon DynamoDB, a fast, highly reliable and cost-effective NoSQL database service designed for internet scale applications. Dynamo…

High Level Overview At a coarse level, AS 7 consists of two main elements: A core manageable service container based on modular classloading Extensions to that core that provide the kind of functionality most users associate with an application serve…

https://www.simform.com/multi-cloud-architecture/ Enterprises increasingly want to take advantage of the flexibility and choice of multiple cloud offerings in order to use best cloud services while achieving satisfactory cost reduction benefits. In f…

Example embodiments of the present invention includes systems and methods for implementing a scalable symmetric multiprocessing (shared memory) computer architecture using a network of homogeneous multi-core servers. The level of processor and memory…

原文地址:https://dzone.com/articles/scalable-distributed-systems-using-akka-spring-boot-ddd-and-java When data that needs to be processed grows large and can’t be contained within a single JVM, AKKA clusters provides features to build such highly scalabl…

1 LVS : Linux Virtual Server http://www.linuxvirtualserver.org/ http://www.linuxvirtualserver.org/zh/ LVS是Linux Virtual Server的简写,意即Linux虚拟服务器,是一个虚拟的服务器集群系统. 本项目在1998年5月由章文嵩博士成立,是中国国内最早出现的自由软件项目之一. 1 Linux服务器集群系统(一) LVS项目介绍 章文嵩 (wensong@linux-vs.org)…

How to setup Darwin Streaming Server 6.0.3 on 32 or 64 bit Linux platforms, add custom functionality by developing plugins ("modules" as Apple calls them), and results of some performance and load tests I ran                 TAG: DSS   Darwin St…

At the scale that Facebook operates, a lot of traditional approaches to serving web content breaks down or simply aren’t practical. The challenge for Facebook’s engineers has been to keep the site up and running smoothly in spite of handling close to…

一.服务端web层 涉及内容Nginx.Varnish.JVM.Web服务器[Tomcat.Web应用开发(Filter.spring mvc.css.js.jsp)] 1.1.基本优化思路 1.尽量缩短单个请求的处理时间 2.尽可能多的并发处理请求 3.应用能够横向扩展 1.2.tomcat的JVM基本优化 tomcat默认的配置已经是经过优化的,个人可优化空间较小,主要调整的是,跟具体使用场景相关的设置.如下 1.合理分配Tomcat需要的内存 主要是启动tomcat的时候设置catalin…

性能测试 BIO -- Blocking IO 即阻塞式IO NIO -- Non-Blocking IO, 即非阻塞式IO或异步IO 性能 -- 所谓的性能是指服务器响应客户端的能力,对于服务器我们通常用并发客户连接数+系统响应时间来衡量服务器性能,例如,我们说这个服务器在10000个并发下响应时间是100ms,就是高性能,而另一个服务器在10个并发下响应时间是500ms,性能一般.所以提升性能就是提升服务器的并发处理能力,和缩短系统的响应时间. 测试方法 用同一个Java Socket Cl…

开始准备看Java NIO的,这篇文章:http://xly1981.iteye.com/blog/1735862 里面提到了这篇文章 http://xmuzyq.iteye.com/blog/783218 同步.异步.阻塞.非阻塞.reactive.proactive等讲的不错. 在高性能的I/O设计中,有两个比较著名的模式Reactor和Proactor模式, 其中Reactor模式用于同步I/O, 而Proactor运用于异步I/O操作. 什么是同步和异步 同步和异步是针对应用程序和内核的…

不多说,复制官方文档,适用于 Java 5 6 7 Architecture OS Default client VM if server-class, server VM; otherwise, client VM Default server VM SPARC 32-bit Solaris   X   i586 Solaris   X   i586 Linux   X   i586 Microsoft Windows X     SPARC 64-bit Solaris —   X AM…

mina是对nio的具体实现.是目前比较高效和流行的nio框架了. 下面是对使用mina进行通讯的一个简单demo,后面再用mina写一个RPC的简单框架.   mina主要包括: (使用的mina版本为2.0.0.M4 core,具体可见官方网站 ) mina也分服务端和客户端(这是肯定的...)   其中服务端为:NioSocketAcceptor 客户端为:NioSocketConnector   类似于Socket的服务端跟客户端Socket.除了这些用来基本通讯的之外,还有一些可以用来…

为了防止无良网站的爬虫抓取文章,特此标识,转载请注明文章出处.LaplaceDemon/SJQ. http://www.cnblogs.com/shijiaqi1066/p/3344148.html 0 概述 0.1 Socket的问题 传统socket由于需要等待资源,所以会出现阻塞现象.服务器端一般只能使用一个客户端socket对应一个处理线程. 但是有以下局限: Java虚拟机会为每个线程分配独立的堆栈空间,工作线程数目越多,系统开销越大,而且增加了Java虚拟机调度线程的负担,增加了线程…

一.  官网说明 在DBCA 建库的时候,有提示让我们选择连接类型,这里有两种类型:专用服务器模式和共享服务器模式.默认使用专用模式.如下图: Oracle 官方文档对这两种文档的说明如下: About Dedicated andShared Server Processes http://download.oracle.com/docs/cd/B28359_01/server.111/b28310/manproc001.htm OracleDatabase creates server pro…

当学习了Java NIO和IO的API后,一个问题立即涌入脑海: 我应该何时使用IO,何时使用NIO呢?在本文中,我会尽量清晰地解析Java NIO和IO的差异.它们的使用场景,以及它们怎样影响您的代码设计. Java NIO和IO的主要差别 下表总结了Java NIO和IO之间的主要区别,我会更具体地描写叙述表中每部分的差异. IO                NIO 面向流            面向缓冲 堵塞IO           非堵塞IO 无 选择器 面向流与面向缓冲 Java N…

本篇博客依照 Java NIO Tutorial翻译,算是学习 Java NIO 的一个读书笔记.建议大家可以去阅读原文,相信你肯定会受益良多. 1. Java NIO Tutorial Java NIO,被称为新 IO(New IO),是 Java 1.4 引入的,用来替代 IO API的. Java NIO:Channels and Buffers 标准的 Java IO API ,你操作的对象是字节流(byte stream)或者字符流(character stream),而 NIO,你操…

一.问题 BIO 和 NIO 作为 Server 端,当建立了 10 个连接时,分别产生多少个线程? 答案: 因为传统的 IO 也就是 BIO 是同步线程堵塞的,所以每个连接都要分配一个专用线程来处理请求,这样 10 个连接就会创建 10 个线程去处理.而 NIO 是一种同步非阻塞的 I/O 模型,它的核心技术是多路复用,可以使用一个链接上的不同通道来处理不同的请求,所以即使有 10 个连接,对于 NIO 来说,开启 1 个线程就够了. 二.BIO 代码实现 public class DemoS…

目录 零.NIO包 一.Java NIO Channel通道 Channel的实现(Channel Implementations) Channel的基础示例(Basic Channel Example) 二.Java NIO Buffer缓冲区 Buffer基本用法(Basic Buffer Usage) Buffer的容量,位置,上限(Buffer Capacity, Position and Limit) 容量(Capacity) 位置(Position) 上限(Limit) Buffer…

Java Socket.SocketServer的读写.连接事件监听,都是阻塞式的.Java提供了另外一种非阻塞式读写.连接事件监听方式——NIO.本文简单的介绍一个NIO Socket入门例子,原理以及详细用法,参考后续文章 服务端代码 import java.io.IOException; import java.net.InetSocketAddress; import java.nio.ByteBuffer; import java.nio.channels.SelectionKey;…