Which of the following statements is correct about dynamic resource scaling of Auto Scaling (AS)?
Suggested Answer:
A
Explanation:
Option A specifically describes Huawei Cloud's dynamic resource adjustment mode. In Huawei Auto Scaling, dynamic scaling uses an alarm policy that evaluates real-time monitoring metrics such as CPU utilization. When the configured alarm condition is reached, AS automatically performs a scaling action to increase or decrease resources so that capacity follows unpredictable workload changes.
Option B is incorrect because triggering an AS policy does not automatically redefine the configured maximum number of instances. The maximum is an upper boundary for the AS group. A scaling policy changes the expected number of instances, adds or removes instances, or sets the instance count to a configured value while remaining within the minimum and maximum boundaries.
Option C correctly describes planned scaling, but the question specifically asks about dynamic resource scaling. Huawei classifies scheduled and periodic policies as planned adjustment mechanisms suitable for workloads that change predictably according to a schedule.
Option D is incorrect because alarm-triggered scaling is subject to a cooldown period. During that period, Huawei Cloud rejects additional scaling requests generated by alarm policies to prevent repeated unnecessary scaling operations.
Therefore, for dynamic resource scaling, A is the correct answer.
Reference topics: Auto Scaling; Dynamic Resource Adjustment; Alarm Policies; Planned Scaling; Cooldown Period.