namenode
基本解释
- n.名字节点
英汉例句
- The Datanodes also perform block creation, deletion, and replication upon instruction from the Namenode.
数据节点执行来自于名字节点的建立、删除、复制指令. - dfs.secondary.http.address :The secondary namenode http server address and port.
如果port为0,则端口就会使用随机的可用port。 - 1.Replication of data blocks does not occur when the NameNode is in the Safemode state.
并不是全部检测完才退出安全模式,而是达到一个配置的比例的时候。