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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-4698) provide client-side metrics for remote reads, local reads, and short-circuit reads
Date Fri, 10 May 2013 00:15:15 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4698?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Colin Patrick McCabe updated HDFS-4698:
---------------------------------------

    Attachment: HDFS-4698.007.patch

fix conflict with the commit of HDFS-4661
                
> provide client-side metrics for remote reads, local reads, and short-circuit reads
> ----------------------------------------------------------------------------------
>
>                 Key: HDFS-4698
>                 URL: https://issues.apache.org/jira/browse/HDFS-4698
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs-client
>    Affects Versions: 2.0.4-alpha
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>            Priority: Minor
>         Attachments: HDFS-4698.001.patch, HDFS-4698.002.patch, HDFS-4698.003.patch, HDFS-4698.004.patch,
HDFS-4698.005.patch, HDFS-4698.006.patch, HDFS-4698.007.patch
>
>
> We should provide metrics to let clients know how many bytes of data they have read remotely,
versus locally or via short-circuit local reads.  This will allow clients to know how well
they're doing at bringing the computation to the data, which will be useful in evaluating
placement policies and cluster configurations.

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