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Type:
Bug
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Status: Patch Available
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Priority:
Major
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Resolution: Unresolved
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Affects Version/s: None
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Fix Version/s: None
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Component/s: tools
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Labels:None
HDFS-9820 proposed adding -rdiff switch to distcp, as a reversed operation of -diff switch.
Upon discussion with Jing Zhao, 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
rsync <fromSnapshotName> <toSnapshotName> <source> <target>
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.
sync <fromSnapshotName> <toSnapshotName> <source> <target>
that ensures <fromSnapshotName> is older than <toSnapshotName>.
Thanks Jing Zhao.
- relates to
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HDFS-9820 Improve distcp to support efficient restore to an earlier snapshot
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- Resolved
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