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https://issues.apache.org/jira/browse/HDFS-9613?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kai Zheng updated HDFS-9613:
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Attachment: HDFS-9613-v2.patch
Updated the patch and refined the logic per my understanding. If checksum opt
and block size are not used while copying, file checksums comparing will be
skipped to avoid unnecessary checksum computing. Fixed the test case failure.
> Minor improvement and clean up in distcp
> ----------------------------------------
>
> Key: HDFS-9613
> URL: https://issues.apache.org/jira/browse/HDFS-9613
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Kai Zheng
> Assignee: Kai Zheng
> Priority: Minor
> Attachments: HDFS-9613-v1.patch, HDFS-9613-v2.patch
>
>
> While working on related issue, it was noticed there are some places in
> {{distcp}} that's better to be improved and cleaned up. Particularly, after a
> file is coped to target cluster, it will check the copied file is fine or
> not. When checking, better to check block size first, then the checksum,
> because the later is a little expensive.
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