Ádám Szita created HIVE-25651:
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Summary: Enable LLAP cache affinity for Iceberg ORC splits
Key: HIVE-25651
URL: https://issues.apache.org/jira/browse/HIVE-25651
Project: Hive
Issue Type: Improvement
Reporter: Ádám Szita
Assignee: Ádám Szita
Since HiveIcebergInputformat doesn't implement any LLAP marker interfaces,
cache affinity is never tried, and so any split containing ORC file parts may
go to a random LLAP daemon, causing subpar hit ratio later.
So we should:
* let HS2 know that cache affinity is required for this inputformat
* prevent Iceberg from grouping separate files together in one combined split
in case of LLAP execution
* provide proper getPath() result for HiveIcebergSplit, so that
HostAffinitySplitLocationProvider calculates different hashes for different
files (right now getPath() returns table location only)
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