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https://issues.apache.org/jira/browse/HDFS-14147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16719602#comment-16719602
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ASF GitHub Bot commented on HDFS-14147:
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GitHub user yzhou2001 opened a pull request:
https://github.com/apache/hadoop/pull/446
HDFS-14147: Back port of HDFS-13056 to the 2.9 branch
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/yzhou2001/hadoop branch-2.9
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/hadoop/pull/446.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #446
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commit e5c3dda5cdfa376ea2ad3d9284f2f9b224ccd1df
Author: yzhou2001 <yazhou@...>
Date: 2018-12-13T00:09:46Z
Back port of HDFS-13056 to the 2.9 branch
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> 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
>
> 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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