namenode
基本解釋
- n.名字節(jié)點
英漢例句
- The Datanodes also perform block creation, deletion, and replication upon instruction from the Namenode.
數(shù)據(jù)節(jié)點執(zhí)行來自于名字節(jié)點的建立、刪除、復制指令. - dfs.secondary.http.address :The secondary namenode http server address and port.
如果port為0,則端口就會使用隨機的可用port。 - 1.Replication of data blocks does not occur when the NameNode is in the Safemode state.
并不是全部檢測完才退出安全模式,而是達到一個配置的比例的時候。