AWS Certified CloudOps Engineer - Associate
EC2 Placement Groups and Network Performance
Why a 25 Gbps instance moves 5 Gbps on one connection, how network I/O credits and ENA allowance counters explain throttling that CloudWatch hides, and which placement group strategy each workload needs.
Intermediate 24 minutes 6 Learning Objectives
- Distinguish single-flow bandwidth from aggregate bandwidth and predict which limit a workload will hit
- Explain how network I/O credits give smaller instances burst bandwidth above their baseline
- Use the ENA allowance counters to identify throttling that CloudWatch instance metrics do not show
- Compare cluster, partition, and spread placement groups, including their hard limits
- Select the correct placement strategy for a given availability or latency requirement
- Diagnose an insufficient capacity error when launching into a placement group