开始学习<数据算法:Hadoop/Spark大数据处理技巧>第1-5章,假期有空就摘抄下来,毕竟不是纸质的可以写写画画,感觉这样效果好点,当然复杂的东西仍然跳过.写博客越发成了做笔记的感觉. 以上. 1.1 What is a Secondary Sort Problem? MapReduce framework automatically sorts the keys generated by mappers.What we know is that MapReduce sorts inpu…

2.1 Introduction MapReduce framework sorts input to reducers by key, but values of reducers are arbitrarily ordered. This means that if all mappers generated the following (key-value) pairs for key = K: (K, V1), (K, V2), ..., (K, Vn). Then all these…

本文内容摘自MySQL5.6官方文档,主要选取了在实践过程中所用到的部分文字解释,力求只摘录重点,快速学会使用MySQL,本文所贴代码地方就是我亲自练习过的代码,凡本文没有练习过的代码都没有贴在此处,如果读者想自己尝试,可以查看官方文档,文中给出了原官方文档的对应链接以供查阅. 本文地址:http://www.cnblogs.com/yhLinux/p/4019386.html http://dev.mysql.com/doc/refman/5.6/en/tutorial.htmlThis ch…

市面上有介绍Delphi的书籍(近来Delphi的书也是越来越少了),但没有一本系统的介绍Lazarus的书,这本书是网上的仅有的一本Lazarus教程,目前全部是英文,不过我已经着手开始翻译,争取尽快翻译完供大家学习!(原书来自 freepascal.org ) code.sd28.Sept.2013 IntroductionThis book is written for programmers who want to learn the Object Pascal Language. It…

从随机过程到马尔科夫链蒙特卡洛方法 1. Introduction 第一次接触到 Markov Chain Monte Carlo (MCMC) 是在 theano 的 deep learning tutorial 里面讲解到的 RBM 用到了 Gibbs sampling,当时因为要赶着做项目,虽然一头雾水,但是也没没有时间仔细看.趁目前比较清闲,把 machine learning 里面的 sampling methods 理一理,发现内容还真不少,有些知识本人也是一知半解,所以这篇博客不可…

From the previous posts, I have analysed 4 different Docker multi-host network solutions - Calico, Flannel, Weave and Docker Overlay Network. You can see more details on how to install, config and tune features of them from previous posts: Calico: A…

Learning Libevent Chapter 0: About this document Chapter 1: A tiny introduction to asynchronous IO. A Libevent Reference Manual R0: Preliminaries R1: Setting up the Libevent library R2: Getting an event_base R3: Running an event loop R4: Working with…

Windows Communication Foundation (WCF),formerly code-named “Indigo,” is Microsoft’s platform for Service-Oriented Architecture (SOA),designed for building distributed service-oriented applications for the enterprise and the web. WCF was released with…

在新文章“MapReduce模式.算法和用例”中,Ilya Katsov提供了一个系统化的综述,阐述了能够应用MapReduce框架解决的问题. 文章开始描述了一个非常简单的.作为通用的并行计算框架的MapReduce应用,这个框架适用于很多要求大量节点进行的计算和数据密集型计算,包括物理和工程仿真,数值分析,性能测试等等.接下来是一组算法,通常用于日志分析.ETL和数据查询,包括计数及求和,数据整理(基于特定函数),过滤,解析,验证和排序. 第二大部分是关于MapReduce模式,Katsov…

401.Which of the following are correct about block media recovery? (Choose all that apply.)A. Physical and logical block corruption is recorded automatically in V$DATABASE_BLOCK_CORRUPTION.B. Logical corruptions are repairable by BMR.C. Physical corr…