[
https://issues.apache.org/jira/browse/HDFS-10314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15248784#comment-15248784
]
Yongjun Zhang commented on HDFS-10314:
--------------------------------------
Hi [~jingzhao],
I'm thinking about implementing -rdiff as a hidden switch of distcp, and
implementing this tool as a script.that calls distcp. What do you think?
Thanks.
> 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
>
> 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].
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
