kartikeyaagrawal opened a new pull request, #18504:
URL: https://github.com/apache/hudi/pull/18504
### Describe the issue this Pull Request addresses
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changes
(or) link to an issue by including `Closes #<issue-number>` for
context.
If this PR includes changes to the storage format, public APIs,
or has breaking changes, use `!` (e.g., feat!: ...) -->
### Summary and Changelog
Implements file-level sorting for upsert operations when LSM tree layout is
enabled, as part of Phase 1 of RFC-103 (Hudi LSM Tree Layout).
closes #18357
### Impact
No public API changes
No reader-side changes needed -- sorted files are readable by existing
readers
Backward compatible -- only affects tables explicitly configured with
LSM_TREE layout
### Risk Level
low -- leverages existing requireSortedRecords() infrastructure that is
already battle-tested for HFile format
### Documentation Update
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feature, config, or user-facing change. If not, put "none".
- The config description must be updated if new configs are added or the
default value of the configs are changed.
- Any new feature or user-facing change requires updating the Hudi website.
Please follow the
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## Changes
- Added `LSM_TREE` as a new `LayoutType` enum value alongside `DEFAULT` and
`BUCKET`
- Created `HoodieLSMTreeLayout` class and registered it in
`HoodieLayoutFactory`
- Extended `HoodieTable.requireSortedRecords()` to return `true` when layout
is `LSM_TREE`, which automatically enables:
- Spark RDD-level sorting via `repartitionAndSortWithinPartitions()`
- `HoodieSortedMergeHandle` for COW merge writes
- Sorted key iteration in `BaseCreateHandle`
- Extended `HoodieAppendHandle.getDataBlock()` to sort records for ALL log
block formats (AVRO, Parquet) when `requireSortedRecords()` is true (previously
only HFile was sorted)
- Added `IS_SORTED` header metadata to `HeaderMetadataType` enum, stamped on
sorted log blocks to enable future readers to detect sorted blocks dynamically
### Contributor's checklist
- [ ] Read through [contributor's
guide](https://hudi.apache.org/contribute/how-to-contribute)
- [ ] Enough context is provided in the sections above
- [ ] Adequate tests were added if applicable
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