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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 Fri, 28 Oct 2016 00:11:59 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15613745#comment-15613745
] 

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

Hi Kai, I like the idea, though I'd like this to come with some kind of migration method like
the Mover for HSM. This might be very useful in the context of the proposed SPS and SSM work.

A related point, I think we should also allow changing and unsetting the EC policy on directories,
since my understanding is that we wanted it to behave similarly to storage policies rather
than "zones". Will file a JIRA for this.

> 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
>
> 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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