增加Router详解-修复图片不显示的问题
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集群中的DataNode向所有的NameNode注册,并定期向这些NameNode发送心跳和块信息,同时DataNode也会执行NameNode发送过来的命令。集群中的NameNodes共享所有DataNode的存储资源。HDFS Federation的架构如下图所示:
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
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
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# 子模块
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