Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 570 discussion

B is correct. https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-scheduled-scaling.html

A - too much operation overhead, manually provisioning the instances after you receive the reminder from eventbridge B - right answer, as you can scale up the EC2 instances and keep them ready before large overload time C - too much operation overhead in manually scaling D - automatic scaling will scale up the instances after some duration after it has encountered the heavy workload traffic, not ideal

runs every Friday evening = an Auto Scaling group that has a scheduled action

The key reasons: Auto Scaling scheduled actions allow defining specific dates/times to scale out or in. This can be used to scale to 6 instances every Friday evening automatically. Scheduled scaling removes the need for manual intervention to scale up/down for the workload. EventBridge reminders and manual scaling require human involvement each week adding overhead. Automatic scaling responds to demand and may not align perfectly to scale out every Friday without additional tuning. Scheduled Auto Scaling actions provide the automation needed to scale for the weekly workload without ongoing operational overhead.

Predicted period.. So schedule the instance

B seems to be correct

When we know the run time is Friday, we can schedule the instance to 6

Correct B.