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https://issues.apache.org/jira/browse/HDFS-16287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17435122#comment-17435122
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tomscut commented on HDFS-16287:
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This is a great idea. Look forward to your updates.
> Support to make dfs.namenode.avoid.read.slow.datanode and
> dfs.namenode.block-placement-policy.exclude-slow-nodes.enabled reconfigurable
> ---------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-16287
> URL: https://issues.apache.org/jira/browse/HDFS-16287
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Haiyang Hu
> Assignee: Haiyang Hu
> Priority: Major
>
> 1. Consider that make dfs.namenode.avoid.read.slow.datanode and
> dfs.namenode.block-placement-policy.exclude-slow-nodes.enabled reconfigurable
> and rapid rollback in case this feature
> [HDFS-16076|https://issues.apache.org/jira/browse/HDFS-16076] and
> [HDFS-15879|https://issues.apache.org/jira/browse/HDFS-15879] unexpected
> things happen in production environment
> 2. Consider In DatanodeManager dealing with choosing targets for blocks
> filter out slow nodes logic
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