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From: "Kai Zheng (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HDFS-7349) Support DFS command for the EC
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    [ https://issues.apache.org/jira/browse/HDFS-7349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14304733#comment-14304733 ] 

Kai Zheng commented on HDFS-7349:
---------------------------------

bq.It's a design question whether we should ask users to configure each item (hdfs ec -convertToEC <path> -numDataBlocks 6 -numParityBlocks 3 -codec RS) or choose from a predefined list (hdfs ec -convertToEC <path> -s RS63)
I thought predefined list is a great idea and better approach, since it's error-prone to specify those parameters. Please note we may have more parameters other than the three ones for some code schemes. I just re-purposed HDFS-7371 to allow predefine EC schemas.

> Support DFS command for the EC encoding
> ---------------------------------------
>
>                 Key: HDFS-7349
>                 URL: https://issues.apache.org/jira/browse/HDFS-7349
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Vinayakumar B
>            Assignee: Vinayakumar B
>         Attachments: HDFS-7349-001.patch, HDFS-7349-002.patch
>
>
> Support implementation of the following commands
> *hdfs dfs -convertToEC <path>*
>    <path>: Converts all blocks under this path to EC form (if not already in EC form, and if can be coded).
> *hdfs dfs -convertToRep <path>*
>    <path>: Converts all blocks under this path to be replicated form.



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