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https://issues.apache.org/jira/browse/HDFS-8138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15829030#comment-15829030
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Andrew Wang commented on HDFS-8138:
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I'm not quite sure what the other cases are for the DN command, but based on
context from another JIRA I've moved this under the "conversion from replicated
to striped" umbrella. Please feel free to change this as is appropriate.
> Refine or extend EC command to support all cases
> ------------------------------------------------
>
> Key: HDFS-8138
> URL: https://issues.apache.org/jira/browse/HDFS-8138
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Kai Zheng
> Assignee: Vinayakumar B
>
> Currently a {{CODEC}} command is used to distribute stripping recovery
> command to DataNode. Discussed with [~umamaheswararao] and [~vinayrpet]
> further, we may need to refine or extend the command to support all cases, as
> we may distribute encoding and recovering tasks in both stripping and
> non-stripping cases. We may have two ways: 1) a single command but uses a
> flag in it to denote all the cases; 2) more commands.
> This will also consider how to layout, optimize or document relevant info
> contained in the the corresponding command related to the block group, so
> DataNode will be able to restore such info according to the concrete command.
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