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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-6974) Add standard configuration keys for HTrace values, propagate across to MR committers if set
Date Wed, 04 Oct 2017 16:45:01 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-6974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Steve Loughran updated MAPREDUCE-6974:
--------------------------------------
    Summary: Add standard configuration keys for HTrace values, propagate across to MR committers
if set  (was: Add standard configuration keys for Htrace values, propagate across to MR committers
if set)

> Add standard configuration keys for HTrace values, propagate across to MR committers
if set
> -------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6974
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6974
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: job submission, performance
>    Affects Versions: 3.0.0-beta1
>            Reporter: Steve Loughran
>            Priority: Minor
>
> HDFS &c support HTrace logging; HBase sets up spans.
> What doesn't do spans is MR jobs or other frameworks with use the MR committers.
> That can be addressed by defining some standard configuration keys for HTrace hi/low
numbers, setting them in job submission, then passing them over the wire in the Configuration,
where setupJob and setupTask can extract them & use for the tracing span. They could also
add their own span for taskCommit and jobCommit for performance measurement there.
> Although the core code would be in MR, I'd propose putting the keys into Hadoop common,
>  with some code in {{org.apache.hadoop.tracing.TraceUtils}}, to set it up. That way its
possible to use more broadly.



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