[ENH] Commit eagerly in ordered blockfile writer

[Sicheng-Pan]

Description of changes

Summarize the changes made by this PR.

• Improvements & Bug fixes
  • N/A
• New functionality
  • Eagerly commit blocks in ordered blockfile writer to avoid excessive memory usage

Test plan

How are these changes tested?

• Tests pass locally with pytest for python, yarn test for js, cargo test for rust

Migration plan

Are there any migrations, or any forwards/backwards compatibility changes needed in order to make sure this change deploys reliably?

Observability plan

What is the plan to instrument and monitor this change?

Documentation Changes

Are all docstrings for user-facing APIs updated if required? Do we need to make documentation changes in the docs section?

[github-actions]

Reviewer Checklist

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Testing, Bugs, Errors, Logs, Documentation

• Can you think of any use case in which the code does not behave as intended? Have they been tested?
• Can you think of any inputs or external events that could break the code? Is user input validated and safe? Have they been tested?
• If appropriate, are there adequate property based tests?
• If appropriate, are there adequate unit tests?
• Should any logging, debugging, tracing information be added or removed?
• Are error messages user-friendly?
• Have all documentation changes needed been made?
• Have all non-obvious changes been commented?

System Compatibility

• Are there any potential impacts on other parts of the system or backward compatibility?
• Does this change intersect with any items on our roadmap, and if so, is there a plan for fitting them together?

Quality

• Is this code of a unexpectedly high quality (Readability, Modularity, Intuitiveness)

[Sicheng-Pan]

• [ENH] Commit eagerly in ordered blockfile writer #6109 👈 (View in Graphite)
• main

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[propel-code-bot]

The writer now persists each completed delta into a finalized block as soon as it closes—whether through commits, swaps, or split handling—keeping track of the committed blocks, updating their sparse index counts, and routing their identifiers into the migration pipeline through an async helper used across the relevant call paths.

Key Changes

• Maintain Inner.completed_blocks (Vec) and eagerly populate it by committing deltas within complete_current_delta, swap_current_delta, and split-handling logic
• Adjust commit to await complete_current_delta, update sparse-index counts for each finalized block, and pass the committed block IDs to apply_migrations_to_blockfile
• Propagate the async complete_current_delta helper through call sites (commit, swap_current_delta) and eagerly commit oversize deltas detected during set-time splits
• Remove now-unused OrderedBlockDelta::len method

Affected Areas

• rust/blockstore/src/arrow/ordered_blockfile_writer.rs
• rust/blockstore/src/arrow/block/delta/ordered_block_delta.rs

This summary was automatically generated by @propel-code-bot