Differences
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hdfs_dfs [2015/09/10 13:39] steve |
hdfs_dfs [2016/04/18 18:21] steve |
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| * [[Hadoop]] | * [[Hadoop]] | ||
| - | * [[hdfs]] | + | * [[HDFS]] |
| * [[hdfs dfsadmin]] | * [[hdfs dfsadmin]] | ||
| + | |||
| + | * [[https://developer.yahoo.com/hadoop/tutorial/module2.html#commandref|HDFS Command Reference]] | ||
| ** Permissions: ** Note that files listed by ''hdfs dfs'' are owned by the ''hdfs'' user on the Linux system. That means that files on HDFS must be written / removed / modified by user ''hdfs''. Using ''root'' will not work. | ** Permissions: ** Note that files listed by ''hdfs dfs'' are owned by the ''hdfs'' user on the Linux system. That means that files on HDFS must be written / removed / modified by user ''hdfs''. Using ''root'' will not work. | ||
| Line 114: | Line 116: | ||
| </code> | </code> | ||
| - | ** Immediatly empty trash ** | + | ** Immediately empty trash ** |
| <code> | <code> | ||
| hdfs dfs -expunge | hdfs dfs -expunge | ||
| + | </code> | ||
| + | |||
| + | ** Disable safe mode ** | ||
| + | |||
| + | HDFS will enable safe mode if the set number of possible nodes to fail have failed. See ''dfs.namenode.safemode.threshold-pct'' in ''hdfs-site.xml''. | ||
| + | |||
| + | <code> | ||
| + | hdfs dfsadmin -safemode leave | ||
| </code> | </code> | ||
