A PostgreSQL production server uses same-zone HA. It must now survive a whole zone outage. Which change should be evaluated?

Choose the single best answer.

A.Increase same-zone standby count while preserving the same zone failure boundary
B.Treat a PITR backup as automatic instantaneous zone failover
C.Supported zone-redundant HA separating primary and synchronous standby across zones
D.Use the HA standby as a normal report endpoint to create zone separation

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✓ Correct answer

Supported zone-redundant HA separating primary and synchronous standby across zones

Cross-zone supported HA separates the relevant infrastructure boundary. More same-zone copies do not isolate the zone; standby reporting is not its role; backup restore is different from ready automatic HA. Source guide: PDF page 41.

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