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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-11664) Loading predefined EC schemas from configuration
Date Tue, 24 Mar 2015 05:48:53 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-11664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14377340#comment-14377340
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Zhe Zhang commented on HADOOP-11664:
------------------------------------

Great idea Vinay!



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On Mon, Mar 23, 2015 at 10:44 PM, Vinayakumar B (JIRA) <jira@apache.org>



> Loading predefined EC schemas from configuration
> ------------------------------------------------
>
>                 Key: HADOOP-11664
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11664
>             Project: Hadoop Common
>          Issue Type: Sub-task
>            Reporter: Kai Zheng
>            Assignee: Kai Zheng
>         Attachments: HADOOP-11664-v2.patch, HDFS-7371_v1.patch
>
>
> System administrator can configure multiple EC codecs in hdfs-site.xml file, and codec
instances or schemas in a new configuration file named ec-schema.xml in the conf folder. A
codec can be referenced by its instance or schema using the codec name, and a schema can be
utilized and specified by the schema name for a folder or EC ZONE to enforce EC. Once a schema
is used to define an EC ZONE, then its associated parameter values will be stored as xattributes
and respected thereafter.



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