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