[HADOOP-12686] Update FileSystemShell documentation to mention the meaning of each columns of fs -du

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: documentation, fs
• Hadoop Flags: Reviewed
• Assignee: Daisuke Kobayashi
• Reporter: Daisuke Kobayashi
• Created: 04/Jan/16 10:51
• Updated: 30/Aug/16 01:20
• Resolved: 04/Jan/16 11:40

Description

hdfs dfs -du command displays in the following format: <size> <disk space consumed> <full path>

E.g.

# hdfs dfs -du /hbase/data/default/wordcount/520106d8e4d6a102bdea7f22e99394b5
43     129    /hbase/data/default/wordcount/520106d8e4d6a102bdea7f22e99394b5/.regioninfo
10200  30600  /hbase/data/default/wordcount/520106d8e4d6a102bdea7f22e99394b5/f

This proposal is to mention the meaning of the first two columns in FileSystemShell.html since it lacks.

ref: https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/shell/FsUsage.java#L112-L121