AWS - Cost Optimization
You design an application with EC2 instances in two regions: us-east-1 and eu-central-1. The app frequently transfers 50 GB daily between these regions. How can you reduce data transfer costs?
You design an application with EC2 instances in two regions: us-east-1 and eu-central-1. The app frequently transfers 50 GB daily between these regions. How can you reduce data transfer costs?
hard📝 Best Practice Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand cross-region transfer costs
Frequent large data transfers between regions incur high costs.Step 2: Evaluate cost-saving strategies
Using S3 replication asynchronously reduces direct cross-region transfer costs by syncing data efficiently.Step 3: Analyze other options
AWS Direct Connect is for on-premises to AWS, not cross-region; moving instances to same AZ is impossible across regions; public internet transfer still incurs costs and latency.Final Answer:
Use S3 buckets in each region and replicate data asynchronously -> Option AQuick Check:
Async S3 replication reduces cross-region transfer costs [OK]
Quick Trick: Use S3 replication to cut cross-region transfer costs [OK]
Common Mistakes:
- Thinking Direct Connect works cross-region
- Assuming public internet transfer is cheaper
- Trying to put instances in same AZ across regions
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