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https://issues.apache.org/jira/browse/TEZ-1993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14313085#comment-14313085
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Bikas Saha commented on TEZ-1993:
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Sounds good.
> Implement a pluggable InputSizeEstimator for grouping fairly
> ------------------------------------------------------------
>
> Key: TEZ-1993
> URL: https://issues.apache.org/jira/browse/TEZ-1993
> Project: Apache Tez
> Issue Type: Bug
> Affects Versions: 0.7.0
> Reporter: Gopal V
> Assignee: Gopal V
> Attachments: TEZ-1993.1.patch, TEZ-1993.2.patch
>
>
> Split grouping is currently done using a file size measurement which is the
> exact size of the split as it stays at rest on HDFS.
> This is not valid for columnar formats and especially suffers from highly
> compressible data skews.
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