Service Saling Summary
| Service Name | Sacling/Failover capability | Comments |
|---|---|---|
| AutoScaling | AZ --Yes ; Region – No | horizental scaling EC2 in same autoscaling group |
| Elastic Cache | Multi AZ failover; | |
| Route53 | Global Service | |
| CloudFront | Global Service | |
| VPC | Span Multi AZ; Region – No | |
| RDB | Muti AZ; Multi Region (read replica) |
Calcuation
EBS --> GP2 typed SSD --> flexible IOPS
