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Posted to hdfs-dev@hadoop.apache.org by "Tao Li (Jira)" <ji...@apache.org> on 2022/05/21 02:15:00 UTC

[jira] [Resolved] (HDFS-16582) Expose aggregate latency of slow node as perceived by the reporting node

     [ https://issues.apache.org/jira/browse/HDFS-16582?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tao Li resolved HDFS-16582.
---------------------------
    Fix Version/s: 3.4.0
                   3.3.4
       Resolution: Fixed

> Expose aggregate latency of slow node as perceived by the reporting node
> ------------------------------------------------------------------------
>
>                 Key: HDFS-16582
>                 URL: https://issues.apache.org/jira/browse/HDFS-16582
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Viraj Jasani
>            Assignee: Viraj Jasani
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.4.0, 3.3.4
>
>          Time Spent: 1.5h
>  Remaining Estimate: 0h
>
> When any datanode is reported to be slower by another node, we expose the slow node as well as the reporting nodes list for the slow node. However, we don't provide latency numbers of the slownode as reported by the reporting node. Having the latency exposed in the metrics would be really helpful for operators to keep a track of how far behind a given slow node is performing compared to the rest of the nodes in the cluster.
> The operator should be able to gather aggregated latencies of all slow nodes with their reporting nodes in Namenode metrics.



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