1.HBase模仿了Google的BigTable,是一种开源的,面向列族的数据库.它基于行键(rowkey),列键(column key)和时间戳(TimeStamp)来建立索引.HBase是建立在分布式集群中的.HBase的最佳合作伙伴是Hadoop(提供HDFS文件系统和MapReduce操作)和Zookeeper(管理分布集群) 2.HBase的安装分为三种模式:单机,伪分布式和全分布式,这也是和Hadoop的三种模式一一对应的. 3.我使用的CDH4,里面提供了hadoop-2.0.0…

准备工作:采用的HBase版本是:CDH4.5,其中的Hadoop版本是:hadoop-2.0.0-cdh4.5.0:HBase版本是:hbase-0.94.6-cdh4.5.0: Hbase的配置文件的最基本设置conf/hbase-env.sh文件,需明确定义: export JAVA_HOME=/usr/local/jdk1.6.0_31conf/hbase-site.xml文件,需明确定义:<configuration><property>    <name>h…

第一章节是介绍性质,但是通过这一章节的学习,我理解到如下概念: 1.Lucene由两部分组成:索引和搜索.索引是通过对原始数据的解析,形成索引的过程:而搜索则是针对用户输入的查找要求,从索引中找到匹配的内容,并表示出来. 2.索引组件的工作顺序是:原始内容--->获取内容(比如利用网络爬虫,这时取得的还是原始内容,只不过是自己想要的原始内容)--->建立文档(这里就是lucene的索引组件真正开始工作的地方了,解析内容变成lucene自己的document)--->文档分析(利用luce…

As we now know, many prominent internet companies, most notably Google, Amazon, Yahoo!, and Facebook, were on the forefront of this explosion of data. Some generated their own data, and others collected what was freely available; but managing these v…

This chapter covers ■ The origins of Hadoop, HBase, and NoSQL ■ Common use cases for HBase ■ A basic HBase installation ■ Storing and querying data with HBase 本章要点 Hadoop,HBase和NoSQL的起源 HBase的常见应用案例 HBase的基本安装 基于HBase保存与查询数据 http://www.uifanr.com/ HB…

Data often trickles in and is added to an existing data store for further usage, such as analytics, processing, and serving. Many HBase use cases fall in this category-using HBase as the data store that captures incremental data coming in from variou…

Relational database systems have been around for a few decades and have been hugely successful in solving data storage, serving, and processing problems over the years. Several large companies have built their systems using relational database system…

Sometimes the best way to understand a software product is to look at how it's used. The kinds of problems it solves and how those solutions fit into a larger application architecture can tell you a lot about a product. Because HBase has seen a numbe…

Let's take a closer look at the term Big Data. To be honest, it's become something of a loaded term, especially now that enterprise marketing engines have gotten hold of it. We'll keep this discussion as grounded as possible. 让我们仔细思考下"大数据"这个词.老实…

Search is the act of locating information you care about: for example, searching for pages in a textbook that contain the topic you want to read about, or for web pages that have the information you're looking for. Searching for documents containing…