Write Ordering

Database journaling and recovery requires write‑order preservation. This write‑ordering requirement applies to both local and remote I/O destinations.

When a database is split across physical devices, all devices must honor the ordering across all database files. Specifically, when a write w1 is issued to a device d1 and is acknowledged as completed before a write w2 to device d2 is initiated, the data written by w2 cannot be present on physical media if the data written by w1 is not present.