Shinichi Yamashita created HDFS-5360:
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Summary: Improvement of usage message of renameSnapshot and
deleteSnapshot
Key: HDFS-5360
URL: https://issues.apache.org/jira/browse/HDFS-5360
Project: Hadoop HDFS
Issue Type: Improvement
Components: snapshots
Affects Versions: 3.0.0
Reporter: Shinichi Yamashita
Priority: Minor
When the argument of "hdfs dfs -createSnapshot" comamnd is inappropriate, it is
displayed as follows.
{code}
[hadoop@trunk ~]$ hdfs dfs -createSnapshot
-createSnapshot: <snapshotDir> is missing.
Usage: hadoop fs [generic options] -createSnapshot <snapshotDir>
[<snapshotName>]
{code}
On the other hands, the commands of "-renameSnapshot" and "-deleteSnapshot" is
displayed as follows. And there are not kind for the user.
{code}
[hadoop@trunk ~]$ hdfs dfs -renameSnapshot
renameSnapshot: args number not 3: 0
[hadoop@trunk ~]$ hdfs dfs -deleteSnapshot
deleteSnapshot: args number not 2: 0
{code}
It changes "-renameSnapshot" and "-deleteSnapshot" to output the message which
is similar to "-createSnapshot".
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