hadoop机架感知配置的相关内容

[帮助文档] 如何在EMR控制台配置弹性伸缩（新版）_EMR on ECS_开源大数据平台 E-MapReduce(EMR)

当您的业务量需求不断波动时，建议您开启弹性伸缩功能并配置相应的伸缩规则，以便于E-MapReduce（简称EMR）可以按业务量波动增加或减少Task节点。确保作业完成的同时，可以节省成本。本文为您介绍如何在EMR控制台配置弹性伸缩。

[帮助文档] 如何配置数据湖构建作为EMR上Hadoop集群的元数据_EMR on ECS_开源大数据平台 E-MapReduce(EMR)

本文为您简单介绍阿里云数据湖构建，以及如何切换E-MapReduce（简称EMR）的元数据存储类型。

大数据实战项目：反爬虫系统（Lua+Spark+Redis+Hadoop框架搭建）第一阶段

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大数据实战项目：反爬虫系统（Lua+Spark+Redis+Hadoop框架搭建）第二阶段

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大数据实战项目：反爬虫系统（Lua+Spark+Redis+Hadoop框架搭建）第三阶段

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[帮助文档] 如何配置HadoopMapReduce类型作业

本文介绍如何配置Hadoop MapReduce类型的作业。

Hadoop机架感知（rack-aware)配置指南

Hadoop机架感知（rack-aware)配置副本的存放策略又是HDFS实现高可靠性和搞性能的关键，优化的副本存放策略也正是HDFS区分于其他大部分分布式文件系统的重要特性。HDFS采用一种称为机架感知（rack-aware）的策略来改进数据的可靠性、可用性和网络带宽的利用率。大型HDFS实例一...

datenode节点超时时间设置，Hadoop启动不正常,HDFS冗余数据块的自动删除,NameNode安全模式问题,ntp时间服务同步,机架感知配置

1.Hadoop datanode节点超时时间设置 datanode进程死亡或者网络故障造成datanode无法与namenode通信，namenode不会立即把该节点判定为死亡，要经过一段时间，这段时间暂称作超时时长。HDFS默认的超时时长为10分钟+30秒。如果定义超时时间为timeout，则超...

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