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From "Yongjun Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-6502) incorrect description in distcp2 document
Date Sun, 08 Jun 2014 07:04:02 GMT

     [ https://issues.apache.org/jira/browse/HDFS-6502?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yongjun Zhang updated HDFS-6502:
--------------------------------

    Description: 
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, making the following modification would be more accurate:

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.
{code}

The "Command Line Options" table:
{code}
  -overwrite: Overwrite destination
  -update: Overwrite destination if source and destination have different contents
{code}

Thanks.


  was:
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.
{code}

The "Command Line Options" table:
{code}
  -overwrite: Overwrite destination
  -update: Overwrite destination if source and destination have different contents
{code}

Thanks.



> incorrect description in distcp2 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, making the following modification would be more accurate:
> 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.
> {code}
> The "Command Line Options" table:
> {code}
>   -overwrite: Overwrite destination
>   -update: Overwrite destination if source and destination have different contents
> {code}
> Thanks.



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