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https://issues.apache.org/jira/browse/HDFS-7717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14386218#comment-14386218
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Kai Sasaki commented on HDFS-7717:
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If there is an API provided by NN for getting meta information such as EC
scheme and policy, a like mover tool which is done as MR job might be easier
one. This course depends on the implementation of NN API.
And second one is that a converter itself does convert, error handling and
reconstruction. This course requires a lot of implementation more than the
first course. But I am not sure this is the better one. Due to the complexity,
I think this might not be good idea anyway.
> 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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