問題文
A change to a production configuration file is about to be made by hand. The team wants a practice that limits the damage if the change turns out to be wrong. Which practice addresses this directly?
選択肢
- Keep a copy of the previous version and record what was changed and why, so that the earlier state can be put back deliberately.
- Perform the change during business hours, so that colleagues are on hand to help if the result turns out wrong.
- Make the change on all hosts at the same time so that the fleet stays consistent, because an inconsistent fleet is harder to reason about than a uniformly broken one and the uniform state can be corrected in one pass.
- Increase the monitoring interval so that problems are noticed sooner, and the change can then be judged from the alerts that follow it in production.