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From "Vrushali C (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-14147) Backport of HDFS-13056 to the 2.9 branch: "Expose file-level composite CRCs in HDFS"
Date Wed, 09 Jan 2019 03:32:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-14147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16737809#comment-16737809

Vrushali C commented on HDFS-14147:

Thanks [~yzhou2001]! That helps set the context for me.

I have re-triggered the build for this patch at

For some reason the previous build had timed out:

> Backport of HDFS-13056 to the 2.9 branch: "Expose file-level composite CRCs in HDFS"
> ------------------------------------------------------------------------------------
>                 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-2.9-001.patch, HDFS-14147-branch-2.9-001.patch,
> 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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