問題文
Two departments share a cluster. One submits many short jobs, the other a few long ones. Over a month the first department consumes far more than its agreed share. Which scheduling mechanism addresses this?
選択肢
- A dedicated partition per department with fixed nodes, which is the only way to enforce shares over a period as long as a month.
- Reducing the number of jobs each user may submit at once, which caps consumption.
- A limit on the maximum run time of each individual job, so that no single long job can monopolize the cluster for a whole day at a time.
- A fair-share policy that lowers the priority of an account that has recently consumed more than its target share.