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From "gschen.fudan" <10210240...@fudan.edu.cn>
Subject Re: [SPAM] [jira] [Updated] (HDFS-4698) provide client-side metrics for remote reads, local reads, and short-circuit reads
Date Thu, 09 May 2013 02:05:21 GMT
于 2013/5/9 9:56, Colin Patrick McCabe (JIRA) 写道:
>       [ 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-4698.004.patch
>      
>> 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
>>
>>
>> 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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