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https://issues.apache.org/jira/browse/MAPREDUCE-2046?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Owen O'Malley resolved MAPREDUCE-2046.
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Resolution: Cannot Reproduce
This isn't true. InputSplits can be arbitrarily sized by the InputFormat.
mapred.TextInputFormat if you set the number of maps very high, you will
generate a large number of maps. In the new mapreduce.in.TextInputFormat, there
are knobs that set the minimum and maximum block size.
> A input split cannot be less than a dfs block
> ----------------------------------------------
>
> Key: MAPREDUCE-2046
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2046
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Namit Jain
>
> I ran into this while testing some hive features.
> Whether we use hiveinputformat or combinehiveinputformat, a split cannot be
> less than a dfs block size.
> This is a problem if we want to increase the block size for older data to
> reduce memory consumption for the
> name node.
> It would be useful if the input split was independent of the dfs block size.
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