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https://issues.apache.org/jira/browse/SPARK-5847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14323340#comment-14323340
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Apache Spark commented on SPARK-5847:
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User 'ryan-williams' has created a pull request for this issue:
https://github.com/apache/spark/pull/4632
> Allow for configuring MetricsSystem's use of app ID to namespace all metrics
> ----------------------------------------------------------------------------
>
> Key: SPARK-5847
> URL: https://issues.apache.org/jira/browse/SPARK-5847
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.2.1
> Reporter: Ryan Williams
> Priority: Minor
>
> {{MetricsSystem}} [currently prepends the app ID to all
> metrics|https://github.com/apache/spark/blob/c51ab37faddf4ede23243058dfb388e74a192552/core/src/main/scala/org/apache/spark/metrics/MetricsSystem.scala#L131].
> When reading Spark metrics in Graphite, I've found this to not always be
> desirable. Graphite is designed to track a mostly-unchanging set of metrics
> over time; it allocates large zeroed-out files for each metric it sees, and
> [by default rate-limits itself from creating many of
> these|https://github.com/graphite-project/carbon/blob/79158ffde5949b4056eb7fdb5e9b6b583fe21ea4/conf/carbon.conf.example#L61-L68].
> App-ID namespacing means that Graphite is allocating disk-space for every
> "metric" for every job it sees, when in reality some metrics may correspond
> to others across jobs (e.g. driver JVM stats).
> Some common Spark usage flows would be better modeled by e.g. namespacing
> metrics by {{spark.app.name}}, so that successive runs of a given job would
> share "metrics", from a storage perspective as well as allowing for
> monitoring aspects of a job's performance over time / many runs.
> There's not likely a one-size-fits-all solution here, so I'd propose allowing
> the metrics config file to allow users to specify whether they'd like metrics
> namespaced by {{spark.app.id}}, {{spark.app.name}}, or some other config
> param.
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