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https://issues.apache.org/jira/browse/HDFS-14147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16722014#comment-16722014
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Dennis Huo commented on HDFS-14147:
-----------------------------------
The branch-2.8 confusion might be because I had started with some prototype
branch-2.8 patches in HDFS-13056 but I never got around to cleaning it up and
refactoring for actually committing into 2.8. Yan's dependency analysis looks
good to me and should allow a clean merge into 2.9, 2.8, and 2.7.
> Backport of HDFS-13056 to the 2.9 branch
> ----------------------------------------
>
> Key: HDFS-14147
> URL: https://issues.apache.org/jira/browse/HDFS-14147
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: datanode, distcp, hdfs
> Affects Versions: 2.9.0, 2.9.1, 2.9.2
> Reporter: Yan
> Priority: Major
> Attachments: HDFS-14147-branch-2.9.v1.patch, HDFS-14147.pdf
>
>
> HDFS-13056, Expose file-level composite CRCs in HDFS which are comparable
> across different instances/layouts, is a significant feature for storage
> agnostic CRC comparisons between HDFS and cloud object stores such as S3 and
> GCS. With the extensively installed base of Hadoop 2, it should make a lot of
> sense to have the feature in Hadoop 2.
> The plan is to start with the backporting to 2.9, followed by 2.8 and 2.7 in
> that order.
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