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http://www.ibm.com/developerworks/cn/linux/kernel/l-k24sch/index.html杨沙洲(pubb@163.net)国防科技大学计算机学院简介：本文详尽地分析了Linux 2.4内核中调度系统的工作原理，特别是i386体系结构下SMP系统的调度表现。通过对2.4调度系统实现原理及其细节的分析，文章在文末指出了2.4调度系统在功能上、实时性上以及多处理机系统表现上存在的不足，为后继的2.6系统的分析作铺垫。一． 前言在开源操作系统中，Linux的发展最为显著，到目前为止，它在低端服务器市场已经占据了相当大的份额。从最新的Linux 2.6系 阅读全文
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引用位置：http://www.ibm.com/developerworks/cn/linux/cluster/linux_cluster/part8/index.htmlOSI参考模型及TCP/IP参考模型OSI模型（open system interconnection reference model）是基于国际标准化组织（ISO）的建议而发展起来的，它分为如图3-1所示的七层。当卫星和无线网络出现以后，现有的协议在和这些网络互联时出现了问题，所以需要一种新的参考体系结构，能无缝地连接多个网络。这个体系结构就是TCP/IP参考模型。TCP 协议因特网在传输层有两种主要的协议：一种是面向连接 阅读全文
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reference：http://www.egrappler.com/javascript-chart-and-graph-libraries-for-developers/BYTEAMEGRAPPLER· MARCH 4, 2014Graphs and charts are used to simplify complex data and make it easy to read and understand. There is a growing number of Open Source and commercial solutions for pure JavaScript 阅读全文
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reference：http://examples.javacodegeeks.com/core-java/lang/string/java-string-class-example/1. IntroductionIn this example we are going to discuss about the basic characteristics ofJava String Class.Stringis probably one of the most used types in Java programs. That’s why Java provides a number of A 阅读全文
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reference：http://java.dzone.com/articles/caching-best-practicesThere is an irresistible attraction to writing custom caching solutions, since it seems to be the easiest path to “improving” the overall application performance. Well, caching is a great technique, but there are few steps to consider be 阅读全文
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reference：http://blog.couchbase.com/topology-architecture-distributed-systemsYou can’t judge a book by its cover, but you can judge the architecture of a distributed system by its topology.If two distributed systems are equally effective, is the one with the simpler topology the one with the better 阅读全文
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1. 定义Facade Patternprovides a unified interface to a set of interfaces in subsystems. Facade defines a higher-level interface that makes the subsystem easier to use.p. 185, Design Patterns, Elements of Reusable Object-Oriented Software by Erich Gamma, Richard Helm, Ralph Jonhson, Johb Vlissides.2. 作 阅读全文
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reference:http://blog.codacy.com/top-10-faster-code-reviews/This is a blog post of ourCode Reading Wednesdaysfrom Codacy (http://www.codacy.com): we make code reviews easier and automatic.Follow the discussion onRedditandHacker NewsHow frequent is it for you to be reviewing code at 3am?When code rev 阅读全文
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reference:http://www.coolcoder.in/2013/12/common-linux-log-files-name-and-usage.htmlif you spend lot of time in Linux environment, it is essential that you know where the log files are located, and what is contained in each and every log file.When your system is running smoothly, take some time to l 阅读全文
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reference :http://crybit.com/tar-command-usages-with-examples/The ‘tar’ saves many files together into a single tape or disk archive, and can restore individual files from the archive. It is very useful in such conditions like when we want to send a lot of files via email, transfer files from one ma 阅读全文