[Data] Make streaming repartition combine small blocks #58020
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Signed-off-by: Alexey Kudinkin <ak@anyscale.com>
Signed-off-by: Alexey Kudinkin <ak@anyscale.com>
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| data_context, | ||
| name=op.name, | ||
| compute_strategy=compute, | ||
| min_rows_per_bundle=op.target_num_rows_per_block, |
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Bug: MapOperator Parameter Validation Issue
The min_rows_per_bundle parameter for MapOperator.create is assigned op.target_num_rows_per_block without validation. If op.target_num_rows_per_block is None, zero, or negative, it could cause unexpected behavior in MapOperator as a positive integer is likely expected.
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Code Review
This pull request correctly enables the combining of smaller blocks in streaming repartition by setting min_rows_per_bundle. The core logic change appears sound. My feedback focuses on improving the test suite to enhance clarity and coverage. I've suggested refactoring the main test for better readability and adding a new test to validate the behavior with remainder blocks, which is a key aspect of this change mentioned in the PR description but not currently covered.
alexeykudinkin
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Oct 23, 2025
## Description Currently, streaming repartition isn't combining blocks to the `target_num_rows_per_block` which is problematic, in a sense that it can only split blocks but not recombine them. This PR is addressing that by allowing it to recombine smaller blocks into bigger ones. However, one caveat is that the remainder of the block could still be under `target_num_rows_per_block`. ## Related issues > Link related issues: "Fixes #1234", "Closes #1234", or "Related to #1234". ## Additional information > Optional: Add implementation details, API changes, usage examples, screenshots, etc. --------- Signed-off-by: Alexey Kudinkin <ak@anyscale.com>
xinyuangui2
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Oct 27, 2025
…8020) ## Description Currently, streaming repartition isn't combining blocks to the `target_num_rows_per_block` which is problematic, in a sense that it can only split blocks but not recombine them. This PR is addressing that by allowing it to recombine smaller blocks into bigger ones. However, one caveat is that the remainder of the block could still be under `target_num_rows_per_block`. ## Related issues > Link related issues: "Fixes ray-project#1234", "Closes ray-project#1234", or "Related to ray-project#1234". ## Additional information > Optional: Add implementation details, API changes, usage examples, screenshots, etc. --------- Signed-off-by: Alexey Kudinkin <ak@anyscale.com> Signed-off-by: xgui <xgui@anyscale.com>
landscapepainter
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Nov 17, 2025
…8020) ## Description Currently, streaming repartition isn't combining blocks to the `target_num_rows_per_block` which is problematic, in a sense that it can only split blocks but not recombine them. This PR is addressing that by allowing it to recombine smaller blocks into bigger ones. However, one caveat is that the remainder of the block could still be under `target_num_rows_per_block`. ## Related issues > Link related issues: "Fixes ray-project#1234", "Closes ray-project#1234", or "Related to ray-project#1234". ## Additional information > Optional: Add implementation details, API changes, usage examples, screenshots, etc. --------- Signed-off-by: Alexey Kudinkin <ak@anyscale.com>
Aydin-ab
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Nov 19, 2025
…8020) ## Description Currently, streaming repartition isn't combining blocks to the `target_num_rows_per_block` which is problematic, in a sense that it can only split blocks but not recombine them. This PR is addressing that by allowing it to recombine smaller blocks into bigger ones. However, one caveat is that the remainder of the block could still be under `target_num_rows_per_block`. ## Related issues > Link related issues: "Fixes ray-project#1234", "Closes ray-project#1234", or "Related to ray-project#1234". ## Additional information > Optional: Add implementation details, API changes, usage examples, screenshots, etc. --------- Signed-off-by: Alexey Kudinkin <ak@anyscale.com> Signed-off-by: Aydin Abiar <aydin@anyscale.com>
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Description
Currently, streaming repartition isn't combining blocks to the
target_num_rows_per_blockwhich is problematic, in a sense that it can only split blocks but not recombine them.This PR is addressing that by allowing it to recombine smaller blocks into bigger ones. However, one caveat is that the remainder of the block could still be under
target_num_rows_per_block.Related issues
Additional information