[jira] [Work started] (HADOOP-14502) Confusion/name conflict between NameNodeActivity#BlockReportNumOps and RpcDetailedActivity#BlockReportNumOps

["Erik Krogen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-14502?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HADOOP-14502 started by Erik Krogen.
--------------------------------------------
> Confusion/name conflict between NameNodeActivity#BlockReportNumOps and RpcDetailedActivity#BlockReportNumOps
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-14502
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14502
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: metrics
>            Reporter: Erik Krogen
>            Assignee: Erik Krogen
>            Priority: Minor
>
> Currently the {{BlockReport(NumOps|AvgTime)}} metrics emitted under the {{RpcDetailedActivity}} context and those emitted under the {{NameNodeActivity}} context are actually reporting different things despite having the same name. {{NameNodeActivity}} reports the count/time of _per storage_ block reports, whereas {{RpcDetailedActivity}} reports the count/time of _per datanode_ block reports. This makes for a confusing experience with two metrics having the same name reporting different values. 
> We already have the {{StorageBlockReportsOps}} metric under {{NameNodeActivity}}. Can we make {{StorageBlockReport}} a {{MutableRate}} metric and remove {{NameNodeActivity#BlockReport}} metric? Open to other suggestions about how to address this as well. The 3.0 release seems a good time to make this incompatible change.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)

---------------------------------------------------------------------
To unsubscribe, e-mail: common-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: common-issues-help@hadoop.apache.org