Network & Infrastructure / High Availability & Recovery Design
RPO validation beyond a green replication status
A replica reports healthy synchronization, but a recovery loses more business work than expected. Status may describe transport or queued changes rather than durable, application-consistent recoverability.
Environment and inputs: Routed and clustered services; define failure ownership, fencing and application recovery requirements before testing. Diagnostic/design example; not tested on production equipment.
Collect the evidence
Record committed application transactions, replication lag semantics, durable apply position and the recovery procedure. Compare a known transaction marker with what is available after an isolated restore.
Explain the result
A healthy replication channel is not a universal guarantee of zero data loss. Durability and consistency depend on the application's commit model and how the recovery target applies changes.
Plan the fix
Define the recovery-point objective in business-visible terms and select supported replication and backup controls to meet it. Keep corruption and accidental deletion recovery separate from availability replication.
Check the result and rollback
Perform a controlled failure and verify committed markers and application consistency on the recovery target. Revert a replication change if its measured loss window exceeds the approved objective.