A lake account is being upgraded to hierarchical namespace. The current recovery design depends on ordinary block-blob PITR. What must happen before relying on the new design?

Choose the single best answer.

A.Replace the incompatible PITR assumption with a supported recovery mechanism and validate the compatibility matrix
B.Assume HNS enables every flat-namespace recovery feature automatically
C.Disable all backups because real directories prevent corruption
D.Use directory rename as a substitute for a pre-error recovery point

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✓ Correct answer

Replace the incompatible PITR assumption with a supported recovery mechanism and validate the compatibility matrix

Ordinary block-blob PITR does not support HNS, so recovery must be redesigned/verified. HNS is not corruption prevention, and namespace renaming does not preserve an independent good historical state. Source guide: PDF page 27.

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