[
https://issues.apache.org/jira/browse/MAPREDUCE-2046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12904822#action_12904822
]
dhruba borthakur commented on MAPREDUCE-2046:
---------------------------------------------
I think that if you use
org.apache.hadoop.mapreduce.lib.input.CombineFileInputFormat and you set the
maximum split size (via setMaxSplitSize) to be smaller than a dfs block size,
still the splits produced are at least as big as a dfs block.
> 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.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
