[jira] [Updated] (HDFS-10314) Propose a new tool that wraps around distcp to "restore" changes on target cluster

["Yongjun Zhang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-10314?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yongjun Zhang updated HDFS-10314:
---------------------------------
    Attachment: HDFS-10314.001.patch

> Propose a new tool that wraps around distcp to "restore" changes on target cluster
> ----------------------------------------------------------------------------------
>
>                 Key: HDFS-10314
>                 URL: https://issues.apache.org/jira/browse/HDFS-10314
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: tools
>            Reporter: Yongjun Zhang
>            Assignee: Yongjun Zhang
>         Attachments: HDFS-10314.001.patch
>
>
> HDFS-9820 proposed adding -rdiff switch to distcp, as a reversed operation of -diff switch. 
> Upon discussion with [~jingzhao], we will introduce a new tool that wraps around distcp to achieve the same purpose.
> I'm thinking about calling the new tool "rsync", similar to unix/linux command "rsync". The "r" here means remote.
> The syntax that simulate -rdiff behavior proposed in HDFS-9820 is
> {code}
> rsync <fromSnapshotName>  <toSnapshotName>  <source> <target>
> {code}
> This command ensure <fromSnapshotName>  is newer than <toSnapshotName>.
> I think, In the future, we can add another command to have the functionality of -diff switch of distcp.
> {code}
> sync <fromSnapshotName>  <toSnapshotName>  <source> <target>
> {code}
> that ensures <fromSnapshotName>  is older than <toSnapshotName>.
> Thanks [~jingzhao].



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