文件存储HDFS版通信的相关内容

HDFS中的NameNode和DataNode的作用是什么？它们之间的通信方式是什么？

HDFS中的NameNode和DataNode的作用是什么？它们之间的通信方式是什么？在HDFS（Hadoop分布式文件系统）中，NameNode和DataNode是两个关键的组件，它们分别承担着不同的角色和功能。下面我将以一个面试者的身份，结合具体的案例和代码，来解释它们的作用以及它们之间的通信方...

Hadoop HDFS概念学习系列之NameNode和Secondary NameNode通信模型（十一）

　NameNode将对文件系统的改动追加保存到本地文件系统上的一个日志文件edits。当一个NameNode启动时，它首先从一个映像文件(fsimage)中读取HDFS的状态，接着执行日志文件中的编辑操作。然后将新的HDFS状态写人fsimage中，井使用个空的edits文件开始正常操作。因为Nam...

Hadoop 分布式文件系统 HDFS

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