フリー問題

問題文

A bank must copy a set of tables from one cluster to another on a fixed rhythm, and wants the copy to be described once rather than driven by hand each night. Which pairing names the unit and the trigger?

選択肢

1. The cluster template that names the datasets and the single trigger that starts it, which the administrators define once for the whole pairing.
2. The distributed snapshot that names the datasets and the single transaction that starts it, which the administrators define once for the whole pairing.
3. The replication policy that names the datasets and the recurring schedule that starts it, which the administrators define once for the whole pairing.
4. The distributed transaction that names the datasets and the manual command that starts it, which the administrators define once for the whole pairing.