問題文
Before a risky schema migration, a fintech team wants a copy of production data that they can freely modify, run destructive experiments against, and throw away, with no effect on production performance. Which Heroku Postgres feature fits?
選択肢
- A fork, which creates a new writable database containing a snapshot of the source at the point the fork was taken and does not affect the parent's performance.
- A follower, which gives the team a copy that stays current with production and can be switched into read-write mode for the duration of the experiment before being switched back to following the leader again afterwards.
- A data clip, which lets the team share the query results of the experiment with reviewers before the migration is applied, and lets those reviewers change the underlying rows from the same clip.
- A scheduled logical backup, restored into the same database.