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https://issues.apache.org/jira/browse/HDFS-7717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14386063#comment-14386063
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Kai Sasaki commented on HDFS-7717:
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[~drankye] Thank you for comment. In order to reduce complexity of error
handling, it may be better to do convert tasks as MR job. So I am also
considering how to get meta data of each file such as EC schema and policy. If
these information can be obtained from NN, we can implement converter tool as
like {{Mover}}. Does it make sense? If there are any good idea about getting EC
information from NN, can you share with me?
Thank you.
> Erasure Coding: provide a tool for convert files between replication and
> erasure coding
> ---------------------------------------------------------------------------------------
>
> Key: HDFS-7717
> URL: https://issues.apache.org/jira/browse/HDFS-7717
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Jing Zhao
> Assignee: Kai Sasaki
>
> We need a tool to do offline conversion between replication and erasure
> coding. The tool itself can either utilize MR just like the current distcp,
> or act like the balancer/mover.
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