HybridDirectory should mmap postings. #52873
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Since version 8.4, `MMapDirectory` has an optimization to read long[] arrays directly in little endian order, which postings leverage. So it'd be more efficient to open postings with `MMapDirectory`. I refactored a bit the existing logic to better explain why every listed file extension is open with `mmap`.
jpountz
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:Distributed Indexing/Store
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Pinging @elastic/es-distributed (:Distributed/Store) |
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Backport of #52641
Since version 8.4,
MMapDirectoryhas an optimization to read long[]arrays directly in little endian order, which postings leverage. So it'd
be more efficient to open postings with
MMapDirectory.I refactored a bit the existing logic to better explain why every listed
file extension is open with
mmap.