Write-Ahead Logging (WAL) dramatically improves performance and durability by turning many small disk writes into sequential batches, while also simplifying crash recovery compared to direct updates.
Write-ahead logging (WAL) ensures that databases can survive sudden power loss by recording changes before they reach the data files, enabling rapid, loss‑free recovery.
Write-ahead logging (WAL) writes changes to a durable log before modifying the database, allowing recovery after crashes and eliminating corruption.