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https://issues.apache.org/jira/browse/TEZ-2879?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siddharth Seth updated TEZ-2879:
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Attachment: TEZ-2879.1.txt
The patch introduces a SplitLocationProvider to provide an alternate set of
locations.
This could have been merged with SplitSizeEstimator - but the two can be used
independently and don't have much relation other than providing some
information about the split.
[~gopalv], [~hitesh], [~rajesh.balamohan] - please review.
> While grouping splits, allow an alternate list of preferred locations to be
> provided per split
> ----------------------------------------------------------------------------------------------
>
> Key: TEZ-2879
> URL: https://issues.apache.org/jira/browse/TEZ-2879
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: Siddharth Seth
> Assignee: Siddharth Seth
> Attachments: TEZ-2879.1.txt, TEZ-2879.1.wip.txt
>
>
> Split locations - at least for FileInputSplits - are generally tied to the
> location on HDFS where the split resides.
> There are situations in which this location is not necessarily the best
> location to process this split.
> e.g.
> Clusters where compute and storage are separate.
> Systems which cache data - cache affinity is more important.
> Providing an alternate list of preferred locations allows grouping to the
> preferred locations, instead of always grouping based on the locations
> specified in the split.
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