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From "Maximilian Michels (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-1502) Expose metrics to graphite, ganglia and JMX.
Date Wed, 17 Feb 2016 09:09:18 GMT

    [ https://issues.apache.org/jira/browse/FLINK-1502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15150166#comment-15150166
] 

Maximilian Michels commented on FLINK-1502:
-------------------------------------------

Hi [~eastcirclek]! In addition to what [~jgrier] wrote:

The cluster setup should be the normal use case for Ganglia/JMX monitoring. When multiple
task managers run in the same JVM or on the same machine, the reporting should work similar.
Just namespace the task manager metrics. Task managers already have an {{InstanceID}} which
uniquely identifies it. On clusters you normal wouldn't run multiple instances on a machine
and its ok if the output on Ganglia is not optimal then.

The metrics shouldn't go through the JobManager to be reported. Actually, they already go
there but just for displaying them in the web interface. However, cluster tools should monitor
processes directly at the nodes. 

Metrics shouldn't be aggregated or combined. Users should be able to monitor nodes and also
identify differences in resource consumption.

> Expose metrics to graphite, ganglia and JMX.
> --------------------------------------------
>
>                 Key: FLINK-1502
>                 URL: https://issues.apache.org/jira/browse/FLINK-1502
>             Project: Flink
>          Issue Type: Sub-task
>          Components: JobManager, TaskManager
>    Affects Versions: 0.9
>            Reporter: Robert Metzger
>            Assignee: Dongwon Kim
>            Priority: Minor
>             Fix For: pre-apache
>
>
> The metrics library allows to expose collected metrics easily to other systems such as
graphite, ganglia or Java's JVM (VisualVM).



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