AWS Certified Cloud Practitioner

Explanation

Rightsizing is the process of matching instance types and sizes to your workload performance and capacity requirements at the lowest possible cost. This involves:

• Analyzing current usage patterns - Understanding CPU, memory, storage, and network utilization
• Identifying over-provisioned resources - Finding instances that are larger than needed
• Finding under-provisioned resources - Identifying instances that are too small and causing performance issues
• Selecting optimal instance types - Choosing the right combination of compute, memory, storage, and networking capabilities

Why the other options are incorrect:

• Auto Scaling: Automatically adjusts capacity to maintain steady, predictable performance at the lowest possible cost, but doesn't specifically address finding the right instance types
• Storage tiering: Involves moving data between different storage classes based on access patterns, not related to EC2 instance selection
• Instance scheduling: Automatically starts and stops instances based on schedules to save costs, but doesn't involve selecting the right instance types

Rightsizing is specifically focused on selecting the most cost-effective EC2 instances that meet performance requirements without over-provisioning.