本文主要是以安装和使用hadoop-0.12.0为例,指出在部署Hadoop的时候容易遇到的问题以及如何解决. 硬件环境共有3台机器,均使用的FC5系统,Java使用的是jdk1.6.0.IP配置如下:dbrg-1:202.197.18.72dbrg-2:202.197.18.73dbrg-3:202.197.18.74 这里有一点需要强调的就是,务必要确保每台机器的主机名和IP地址之间能正确解析. 一个很简单的测试办法就是ping一下主机名,比如在dbrg-1上ping dbrg-2,如果能p…

Herriot测试框架是Hadoop-0.21.0及以后版本中新加入的测试框架,它的出现主要是为了尽可能地模拟真实的大规模分布式系统,并且对该系统实现自动化测试.和Hadoop以前的测试框架MiniDFSCluster类似,Herriot也采用了JUnit框架,此外,Herriot还引入了面向切面编程(AOP)技术-AspectJ,实现了代码注入和错误注入,丰富了测试的内容. 上图是采用Herriot框架对Hadoop集群进行测试的典型场景,可以看到:与早期的MiniDFSCluster测试框架…

impala2.12 官方:http://impala.apache.org/ 一 简介 Apache Impala is the open source, native analytic database for Apache Hadoop. Impala is shipped by Cloudera, MapR, Oracle, and Amazon. impala是hadoop上的开源分析性数据库:C++和java语言开发: Do BI-style Queries on Hadoop Im…

Overview Apache Impala (incubating) is the open source, native analytic database for apache Hadoop. Features Do BI-style Queries on Hadoop: low latency and high concurrency for BI/analytic queries on Hadoop(not delivered by batch frameworks such as A…

EasyReport是一个简单易用的Web报表工具(支持Hadoop,HBase及各种关系型数据库),它的主要功能是把SQL语句查询出的行列结构转换成HTML表格(Table),并支持表格的跨行(RowSpan)与跨列(ColSpan).同时它还支持报表Excel导出.图表显示及固定表头与左边列的功能.总体架构如下图所示: 目录 开发环境(Development Environment) 安装与部署(Installation & Deployment) 从源代码安装(From Source Co…

ResourceManager High Availability (RM高可用) Introduction(简介) Architecture(架构) RM Failover(RM 故障切换) Recovering prevous active-RM's state(恢复之前活动的RM的状态) Deployment(部署) Configurations(配置) Admin commands(管理命令) ResourceManager Web UI services(RM Web UI服务) We…

HDFS Architecture HDFS Architecture(HDFS 架构) Introduction(简介) Assumptions and Goals(假设和目标) Hardware Failure(硬件失效是常态) Streaming Data Access(支持流式访问) Large Data Sets(大数据集) Simple Coherency Model(简单一致性模型) "Moving Computation is Cheaper than Moving Data&q…

A record--Offline deployment of Big Data Platform CDH Cluster Tags: Cloudera-Manager CDH Hadoop Deploy Cluster Abstract: Deployment and Management of Hadoop clusters need tools, such as Cloudera Manager. In this article, I compare the tools briefly,…

Hadoop promises to become a ubiquitous framework for largescale business intelligence, but right now it is difficulty for many developersto use. Datameer’s approack – making Hadoop accessible to more users who needscalable analytic power for their or…

Openstack 项目Sahara,主要是用来搭建Hadoop集群,利用虚拟出来的计算资源,高速搭建Hadoop集群. Sahara项目与OPenstack其它项目的关系: 图片转自:http://docs.openstack.org/developer/sahara/overview.html Sahara有两种基本使用流程: 1.高速布署,用户能够添加降低Hadoop节点,,,, 2.分析即服务,依据用户设定的模板创建Hadoop集群,跟计算,然后干掉集群,之后把结果放在(比方Swift容…