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From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11194) Maintain aggregated peer performance metrics on NameNode
Date Wed, 14 Dec 2016 07:09:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15747513#comment-15747513
] 

Kai Zheng commented on HDFS-11194:
----------------------------------

For the trade-off, would it be good to put such new metrics into off-heap? We have lots of
discussions like this but it's hard for existing inode things so blocked. Maybe it's good
for new memory consuming data structures in NameNode.

> Maintain aggregated peer performance metrics on NameNode
> --------------------------------------------------------
>
>                 Key: HDFS-11194
>                 URL: https://issues.apache.org/jira/browse/HDFS-11194
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.8.0
>            Reporter: Xiaobing Zhou
>            Assignee: Xiaobing Zhou
>
> The metrics collected in HDFS-10917 should be reported to and aggregated on NameNode
as part of heart beat messages. This will make is easy to expose it through JMX to users who
are interested in them.



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