`hadoop dfs` 和 `hadoop fs` 之间的区别

本文介绍了`hadoop dfs` 和 `hadoop fs` 之间的区别的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我看到了 dfs 命令，然后去了文档，但我无法理解.在我看来 fs 和 dfs 的工作方式类似.有人给出确切的区别吗?

I saw the dfs command, then went to the documentation but I am unable to understand. In my point of view fs and dfs working similar. Any one give exact difference?

推荐答案

你可以在 $HADOOP_HOME/bin/hadoop 中看到两个命令(hadoop fs & hadoop dfs)的定义

You can see definitions of the two commands (hadoop fs & hadoop dfs) in $HADOOP_HOME/bin/hadoop

... elif [ "$COMMAND" = "datanode" ] ; then CLASS='org.apache.hadoop.hdfs.server.datanode.DataNode' HADOOP_OPTS="$HADOOP_OPTS $HADOOP_DATANODE_OPTS" elif [ "$COMMAND" = "fs" ] ; then CLASS=org.apache.hadoop.fs.FsShell HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" elif [ "$COMMAND" = "dfs" ] ; then CLASS=org.apache.hadoop.fs.FsShell HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" elif [ "$COMMAND" = "dfsadmin" ] ; then CLASS=org.apache.hadoop.hdfs.tools.DFSAdmin HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" ...

所以，它们完全相同.