jpountz opened a new pull request, #13467:
URL: https://github.com/apache/lucene/pull/13467
This includes the following changes:
- New `IndexInput#slice(String, long, long, ReadAdvice)` API that allows
creating slices with different advices.
- New `CompoundFormat` that aligns start offsets on multiples of 4,096 to
prevent multiple sub files from being stored on the same page. This in-turn
allows `madvise` to give different advices to different files. This is what
causes the large diff due to the dance required when creating a new codec.
- `PosixNativeAccess` now explicitly sets `MADV_NORMAL` when called with
`ReadAdvice.NORMAL`. This is required to be able to override a `RANDOM` advice
of a compound file with a `NORMAL` advice of a sub file of this compound file.
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