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https://issues.apache.org/jira/browse/HDFS-10258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15241069#comment-15241069
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Kai Zheng commented on HDFS-10258:
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Thanks [~libo-intel] for the consideration. It's good to support a smaller
cluster because it will allow someone to play with erasure coding with only a
few nodes. However, I'm not sure if it's good to change much logic to allow
#DataNode < # (Blocks in a BlockGroup) (if fortunately we don't have to, fine)
because it may not make so much sense. Instead, we can consider to leverage the
3+2 schema and policy.
> Erasure Coding: support small cluster whose #DataNode < # (Blocks in a
> BlockGroup)
> ----------------------------------------------------------------------------------
>
> Key: HDFS-10258
> URL: https://issues.apache.org/jira/browse/HDFS-10258
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Li Bo
> Assignee: Li Bo
>
> Currently EC has not supported small clusters whose datanode number is
> smaller than the block numbers in a block group. This sub task will solve
> this problem.
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