フリー問題

問題文

One application spreads its data over three volumes: data, log, and index. If each volume is snapped at a slightly different moment the restore can fail. Which pair states what the group operation needs and what it thereby keeps?

選択肢

1. One application spreads its data over three volumes, so the group operation needs the shared atomicity and the later restore keeps the shared consistency in that specification.
2. One application spreads its data over three volumes, so the group operation needs the shared periodicity and the later restore keeps the shared metering in that specification.
3. One application spreads its data over three volumes, so the group operation needs the shared atomicity and the later restore keeps the shared metering in that specification.
4. One application spreads its data over three volumes, so the group operation needs the shared periodicity and the later restore keeps the shared consistency in that specification.