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https://issues.apache.org/jira/browse/HDFS-14061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16750485#comment-16750485
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Wei-Chiu Chuang commented on HDFS-14061:
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+1 on the 005 patch. Will commit shortly.
> Check if the cluster topology supports the EC policy before setting, enabling
> or adding it
> ------------------------------------------------------------------------------------------
>
> Key: HDFS-14061
> URL: https://issues.apache.org/jira/browse/HDFS-14061
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: erasure-coding, hdfs
> Affects Versions: 3.1.1
> Reporter: Kitti Nanasi
> Assignee: Kitti Nanasi
> Priority: Major
> Attachments: HDFS-14061.001.patch, HDFS-14061.002.patch,
> HDFS-14061.003.patch, HDFS-14061.004.patch, HDFS-14061.005.patch
>
>
> HDFS-12946 introduces a command for verifying if there are enough racks and
> datanodes for the enabled erasure coding policies.
> This verification could be executed for the erasure coding policy before
> enabling, setting or adding it and a warning message could be written if the
> verify fails, or the policy setting could be even failed in this case.
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