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https://issues.apache.org/jira/browse/HDFS-10917?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15827027#comment-15827027
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Xiaobing Zhou commented on HDFS-10917:
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v006 made some changes by removing unnecessary queue allocations.
{code}
224 LinkedBlockingDeque<SumAndCount> deque = new
LinkedBlockingDeque<SumAndCount>(
225 numWindows);
{code}
> Collect peer performance statistics on DataNode.
> ------------------------------------------------
>
> Key: HDFS-10917
> URL: https://issues.apache.org/jira/browse/HDFS-10917
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 2.8.0
> Reporter: Xiaobing Zhou
> Assignee: Xiaobing Zhou
> Fix For: 3.0.0-alpha2
>
> Attachments: HDFS-10917.000.patch, HDFS-10917.001.patch,
> HDFS-10917.002.patch, HDFS-10917.003.patch, HDFS-10917.004.patch,
> HDFS-10917.005.patch, HDFS-10917-branch-2.005.patch,
> HDFS-10917-branch-2.006.patch
>
>
> DataNodes already detect if replication pipeline operations are slow and log
> warnings. For the purpose of analysis, performance metrics are desirable.
> This proposes adding them on DataNodes.
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