1.NameNode(管理节点) Namenode 管理着文件系统的命令空间(Namespace)。它维护着文件系统树以及文件树中所有的文件和文件夹的元数据(metadata)，元数据包括编辑日志(edits)和镜像文件。管理这些信息的文件有两个，分别是Namespace 镜像文件(fsimage)和编辑日志文件，编辑日志主要是记录对hdfs进行的修改...

文章 2018-03-06 来自：开发者社区

hadoop/spark节点动态调整

转自：hadoop2.7 动态新增节点和删除节点转自：spark集群动态增加worker节点 hadoop安装过程中包括yarn的节点，hadoop有多个节点，spark也是多个节点，也区分master和slave

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开源大数据平台 E-MapReduce

开源大数据平台 E-MapReduce（简称“EMR”）是云原生开源大数据平台，向客户提供简单易集成的Hadoop、Hive、Spark、Flink、Presto、ClickHouse、StarRocks、Delta、Hudi等开源大数据计算和存储引擎服务。

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立即开通

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优惠活动

StarRocks 免费试用

产品入门

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常见问题

最佳实践

EMR实时计算实践