Which statement about GCP Sustained Use Discounts is correct?

Which statement about GCP Sustained Use Discounts is correct?

• A. Upfront annual commitment required
• B. Time-based volume discount based on how long instances run within the month
• C. Discounts are allocated to the most expensive instance types only
• D. Applies only to pre-emptible instances

Answer: (B)

Sustained Use Discounts are automatic, time-based reductions that Google Cloud applies based on how many minutes a VM runs in a billing month. The longer you keep an instance running within the month, the larger the discount, up to a limit. There’s no upfront annual commitment needed, so that eliminates the first option. The discount isn’t limited to the most expensive instance types; it’s applied to eligible on-demand usage across supported instances, so the third option isn’t accurate. And it doesn’t apply to preemptible instances, which makes the statement about preemptibles incorrect. This makes the correct description that the discount scales with the proportion of the month that the VM runs.

Sustained Use Discounts are automatic, time-based reductions that Google Cloud applies based on how many minutes a VM runs in a billing month. The longer you keep an instance running within the month, the larger the discount, up to a limit. There’s no upfront annual commitment needed, so that eliminates the first option. The discount isn’t limited to the most expensive instance types; it’s applied to eligible on-demand usage across supported instances, so the third option isn’t accurate. And it doesn’t apply to preemptible instances, which makes the statement about preemptibles incorrect. This makes the correct description that the discount scales with the proportion of the month that the VM runs.