Question

You manage a Virtual Machine Scale Set that hosts a stateless web API. Traffic is highly variable, peaking during business hours and dropping sharply overnight. You want the scale set to automatically add instances when average CPU exceeds 70% and remove instances when it falls below 30%, without manual intervention. Which scaling configuration should you apply to the scale set?

Accepted Answer

Configure custom autoscale rules based on the Percentage CPU metric with scale-out and scale-in thresholds

Answer

Set the scale set to Manual scale mode and update the instance count on a schedule using Azure Automation

Answer

Enable overprovisioning on the scale set so extra instances are created automatically

Answer

Increase the VM size (scale up) for the scale set instances to handle peak load