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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10996) Ability to specify per-file EC policy at create time
Date Tue, 15 Nov 2016 23:26:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15668728#comment-15668728
] 

Andrew Wang commented on HDFS-10996:
------------------------------------

Thanks for working on this [~Sammi]. This seems like a good time to revisit the create API.
How do you feel about a builder-based API? Otherwise, it's quite difficult for users to correctly
fill in all the different parameters.

This refactor is something we could work on in a separate JIRA first to reduce the scope of
the changes.

> Ability to specify per-file EC policy at create time
> ----------------------------------------------------
>
>                 Key: HDFS-10996
>                 URL: https://issues.apache.org/jira/browse/HDFS-10996
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: erasure-coding
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Andrew Wang
>            Assignee: SammiChen
>         Attachments: HDFS-10996-v1.patch, HDFS-10996-v2.patch, HDFS-10996-v3.patch
>
>
> Based on discussion in HDFS-10971, it would be useful to specify the EC policy when the
file is created. This is useful for situations where app requirements do not map nicely to
the current directory-level policies.



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