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https://issues.apache.org/jira/browse/HDFS-8020?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14394119#comment-14394119
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Kai Sasaki commented on HDFS-8020:
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According to design
[doc|https://issues.apache.org/jira/secure/attachment/12708287/ECWorker-design-v2.pdf],
DN should receive {{DNA_ECENCODE}} or {{DNA_ECDECODE}} command from NameNode.
But [HDFS-7369|https://issues.apache.org/jira/browse/HDFS-7369] uses only
{{DNA_CODEC}} instead of these command. Is there any changes about command
design? I think if there is only {{DNA_CODEC}} command, there is no way to
decide to encode or decode.
> Erasure Coding: restore BlockGroup and schema info from stripping coding
> command
> --------------------------------------------------------------------------------
>
> Key: HDFS-8020
> URL: https://issues.apache.org/jira/browse/HDFS-8020
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Kai Zheng
> Assignee: Kai Sasaki
>
> As a task of HDFS-7344, to process *stripping* coding commands from NameNode
> or other scheduler services/tools, we need to first be able to restore
> BlockGroup and schema information in DataNode, which will be used to
> construct coding work.
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