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https://issues.apache.org/jira/browse/HADOOP-5710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12711476#action_12711476
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Sharad Agarwal commented on HADOOP-5710:
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Patch looks good. Few minor points:
should we rename the group and counter to more readable and intuitive value.
Say Group name as "FileInputFormatCounters" and counter name as "BYTES_READ",
Because anyway we are calculating the bytes read from the file, not really the
bytes input to the map (there may be some bytes skipped while reading so these
two may not be same).
include a deprecated warning in the old Counters API while mapping the old name
to new name.
> Counter MAP_INPUT_BYTES missing from new mapreduce api.
> -------------------------------------------------------
>
> Key: HADOOP-5710
> URL: https://issues.apache.org/jira/browse/HADOOP-5710
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Amareshwari Sriramadasu
> Assignee: Amareshwari Sriramadasu
> Fix For: 0.21.0
>
> Attachments: patch-5710-1.txt, patch-5710.txt
>
>
> MapTask, with current new mapreduce api, does not maintain MAP_INPUT_BYTES
> counter. Since RecordReader doesnot have getPos() api, it is not possible for
> the map task to maintain. Individual record readers (LineRecordReader,
> SequenceFileRecordReader) could be modified to maintain the same.
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