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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-12421) Balancer to emit standard metrics
Date Mon, 11 Sep 2017 20:44:02 GMT

     [ https://issues.apache.org/jira/browse/HDFS-12421?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zhe Zhang updated HDFS-12421:
-----------------------------
    Component/s: metrics

> Balancer to emit standard metrics
> ---------------------------------
>
>                 Key: HDFS-12421
>                 URL: https://issues.apache.org/jira/browse/HDFS-12421
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: balancer & mover, metrics
>            Reporter: Erik Krogen
>            Assignee: Erik Krogen
>            Priority: Minor
>
> The Balancer currently prints some statistics about its operation to stdout while it
is running. This is fine if the balancer is manually run via CLI by an operator, but for the
more common case of it being a scheduled execution, it is cumbersome to have to track down
the logs to be able to monitor its progress.
> We already have a standard metrics system in place; I propose that we have the Balancer
emit metrics while it is running so that they can be tracked via standard metrics infrastructure.
We can start with just the things that the balancer already prints to stdout: bytes already
moved, bytes left to move, bytes currently being moved, and iteration number.



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