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From "Rakesh R (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7866) Erasure coding: NameNode manages EC schemas
Date Fri, 10 Apr 2015 11:30:14 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14489411#comment-14489411
] 

Rakesh R commented on HDFS-7866:
--------------------------------

bq. Regarding refreshECSchemas, you're right we should do that. We should avoid having to
restart NameNode just for the reloading. Note the operation should be protected, only for
admin.
Thanks for the reply. Shall I raise a separate sub-task and start exploring it more?

> Erasure coding: NameNode manages EC schemas
> -------------------------------------------
>
>                 Key: HDFS-7866
>                 URL: https://issues.apache.org/jira/browse/HDFS-7866
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Kai Zheng
>            Assignee: Kai Zheng
>         Attachments: HDFS-7866-v1.patch
>
>
> This is to extend NameNode to load, list and sync predefine EC schemas in authorized
and controlled approach. The provided facilities will be used to implement DFSAdmin commands
so admin can list available EC schemas, then could choose some of them for target EC zones.



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