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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-13166) Review MR counters
Date Fri, 15 May 2015 17:22:59 GMT

     [ https://issues.apache.org/jira/browse/HBASE-13166?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell updated HBASE-13166:
-----------------------------------
    Assignee: Usha Kuchibhotla

> Review MR counters
> ------------------
>
>                 Key: HBASE-13166
>                 URL: https://issues.apache.org/jira/browse/HBASE-13166
>             Project: HBase
>          Issue Type: Task
>          Components: mapreduce
>    Affects Versions: 0.98.4
>            Reporter: Nick Dimiduk
>            Assignee: Usha Kuchibhotla
>              Labels: beginner
>
> I was diagnosing a slow CopyTable job recently. It seems we're not exposing through hadoop
counters as many statistics as we might. For example, HDFS gives things like bytes read, we
apparently do not. This task is to review the counters exposed -- assume you don't have access
to debug logs to understand what happened -- and ensure our coverage on the key points. This
particular job appears to be moving data between two tables, both of which have poorly distributed
region splits.
> Perhaps there's follow-on to make things work better with uneven region sizes, leveraging
some of the region size goodness added in HBASE-10413.



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