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From "SammiChen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11072) Add ability to unset and change directory EC policy
Date Wed, 07 Dec 2016 11:51:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15728577#comment-15728577
] 

SammiChen commented on HDFS-11072:
----------------------------------

Thank you Rakesh so much for reviewing the patch! And very good advice. 

1. For replication policy ID, I will prefer to use 128 since there are a lot of checkers checking
that policy ID cannot be negative number. I guess we will not have as many as 128 polices
in future. 
2. a new API {{unsetErasureCodingPolicy}} and a new sub command are very good suggestions.
Will follow it in the new patch. 
3. Sure, I will improve the docs. 






> Add ability to unset and change directory EC policy
> ---------------------------------------------------
>
>                 Key: HDFS-11072
>                 URL: https://issues.apache.org/jira/browse/HDFS-11072
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: erasure-coding
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Andrew Wang
>            Assignee: SammiChen
>              Labels: hdfs-ec-3.0-must-do
>         Attachments: HDFS-11072-v1.patch, HDFS-11072-v2.patch, HDFS-11072-v3.patch, HDFS-11072-v4.patch
>
>
> Since the directory-level EC policy simply applies to files at create time, it makes
sense to make it more similar to storage policies and allow changing and unsetting the policy.



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