[jira] [Moved] (MAPREDUCE-5899) Support incremental data copy in DistCp

["Tsz Wo Nicholas Sze (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tsz Wo Nicholas Sze moved HADOOP-10608 to MAPREDUCE-5899:
---------------------------------------------------------

        Key: MAPREDUCE-5899  (was: HADOOP-10608)
    Project: Hadoop Map/Reduce  (was: Hadoop Common)

> Support incremental data copy in DistCp
> ---------------------------------------
>
>                 Key: MAPREDUCE-5899
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5899
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: distcp
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>         Attachments: HADOOP-10608.000.patch, HADOOP-10608.001.patch
>
>
> Currently when doing distcp with -update option, for two files with the same file names but with different file length or checksum, we overwrite the whole file. It will be good if we can detect the case where (sourceFile = targetFile + appended_data), and only transfer the appended data segment to the target. This will be very useful if we're doing incremental distcp.



--
This message was sent by Atlassian JIRA
(v6.2#6252)