Yongjun Zhang created HDFS-6502:
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Summary: a typo in distcp document
Key: HDFS-6502
URL: https://issues.apache.org/jira/browse/HDFS-6502
Project: Hadoop HDFS
Issue Type: Bug
Components: documentation
Affects Versions: 2.4.0
Reporter: Yongjun Zhang
In http://hadoop.apache.org/docs/r1.2.1/distcp2.html#UpdateAndOverwrite
The first statement of the "Update and Overwrite" section says:
{quote}
-update is used to copy files from source that don't exist at the target, or
have different contents. -overwrite overwrites target-files even if they exist
at the source, or have the same contents.
{quote}
The "Command Line Options" table says :
{quote}
-overwrite: Overwrite destination
-update: Overwrite if src size different from dst size
{quote}
Based on the implementation, they need to modified to:
The first statement of the "Update and Overwrite" section:
{code}
-update is used to copy files from source that don't exist at the target, or
have different contents. -overwrite overwrites target-files if they exist at
the target, and even if they have the same contents as the source-files.
{code}
The "Command Line Options" table:
{code}
-overwrite: Overwrite destination
-update: Overwrite if src and dst have different contents
{code}
Thanks.
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