lancedb-gatefixer[bot] 8c34cfc9cc test(rust): guard parallel compaction fragment reservation
## Summary

- lock in the upstream fix that batches legacy row-ID fragment reservations into one coordinated commit
- exercise 32 indexed compaction tasks with 64 workers, exceeding the former 20-retry contention threshold
- verify data integrity, compaction metrics, and the expected two-commit transaction footprint

## Root cause

Parallel compaction used to reserve fragment IDs independently in every rewrite task. On high-core machines, those internal commits contended with one another and could exhaust the commit retry budget. The pinned Lance implementation now gathers the completed tasks and reserves all required fragment IDs once before the final rewrite commit; this regression test protects that behavior at the LanceDB integration boundary.

## Validation

- cargo fmt --all -- --check
- cargo test --quiet --features remote -p lancedb --lib table::optimize::tests
- cargo check --quiet --features remote --tests --examples
- cargo clippy --quiet --features remote --tests --examples (passes with four pre-existing redundant_pub_crate warnings in remote-table code)

Fixes #1971

<!-- lance-gatekeeper-fix:v1 agent=18fd17ea143769e1da7c5aa5222ecdda generation=1 -->
2026-10-30 17:24:34 +08:00
2023-03-17 18:15:19 -07:00
2025-03-10 09:01:23 -07:00

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LanceDB

The Multimodal Lakehouse for AI

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The ultimate multimodal data platform for AI/ML applications.

LanceDB is designed for fast, scalable, and production-ready vector search. It is built on top of the Lance columnar format. You can store, index, and search over petabytes of multimodal data and vectors with ease. LanceDB is a central location where developers can build, train and analyze their AI workloads.


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Developer-friendly OSS embedded retrieval library for multimodal AI. Search More; Manage Less.
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