sunlimiao的专栏

执行: hadoop dfsadmin -report 输出: Configured Capacity: 178789011456 (166.51 GB) Present Capacity: 69984800768 (65.18 GB) DFS Remaining: 69981171712 (65.18 GB) DFS Used: 3629056 (3.46 MB) DFS Used%

A question was asked of me recently, on how to force the namenode to detect failed datanodes more quickly. This is very useful when testing, and can be quite risky on busy clusters. In hadoop 19,