File-Level write-write conflict detection (Generally Available)
Data Warehouse · General availability · Planned
Description
This feature is part of the concurrency control strategy for Fabric DW. File-level write-write conflict detection is a mechanism designed to prevent two concurrent transactions from modifying the same physical file in a data warehouse at the same time. More precise than table-level detection (which blocks any concurrent changes to the same table).What It Does?Scope: Operates at the file level (e.g., Parquet files in Fabric DW), rather than at the table or row level.Goal: Detect overlapping changes (updates, deletes) to the same file during concurrent transactions.Trigger: When a transaction tries to commit changes, the system checks if any newer manifests indicate modifications to the same file since the transaction started.Lays groundwork for even finer-grained detection (row-level) in later releases.
Change History
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2026-04-01
Release Date 2026-06-09 -> 2026-09-08 -
2026-03-02
Release Date 2026-04-30 -> 2026-06-09 -
2025-11-18
Roadmap Item Added
Workload: Data Warehouse