Steve Loughran created HADOOP-18792:
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Summary: s3a prefetching to use split start/end options to limit
prefetch range
Key: HADOOP-18792
URL: https://issues.apache.org/jira/browse/HADOOP-18792
Project: Hadoop Common
Issue Type: Sub-task
Reporter: Steve Loughran
the bundled hadoop record readers pass the split start/end down to openFile()
-these can be used by the prefetching stream as hints as to where to start and
stop prefetching.
Hints only as
* records can extend past split end; that last record will still be read when
split end < EOF
* for formats with footers which get read, caching that footer is important
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