DD和NN之間的通信詳解

(file:///C:/Users/bing/AppData/Local/Temp/msohtmlclip1/01/clip_image002.jpg)] namenode主節點先啓動,然後datanode啓動,啓動後向主節點namenode主節點註冊, 主節點校驗,檢驗ok就返回集羣(cluster)ID和BP-ID給datanode, 然後datanode拿着集羣ID(cluster)向主節點

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