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In the world of software development, building scalable and cost-efficient architectures is key. AWS serverless services offer an amazing solution with their pay-as-you-go model, automatic scaling, and high availability.
What is Three-Tier Architecture?
A three-tier architecture divides an application into:
✅ Presentation Tier: User interaction layer (web/app)
✅ Business Logic Tier: Application functionality (code execution)
✅ Data Tier: Data storage (databases)
This separation enhances scalability, modularity, and flexibility.
Leveraging AWS Free Tier
1️⃣ Presentation Tier
- Amazon S3: Host your website or app
aws s3 cp ./website s3://your-bucket-name --recursive
Free Tier: 5 GB storage, 20,000 GET and 2,000 PUT requests for the first year
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Amazon CloudFront: Speed up asset delivery
aws cloudfront create-distribution --origin-domain-name your-bucket-name.s3.amazonaws.com
Free Tier: 1 TB data transfer out & 10 million HTTP(S) requests/month
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Amazon Cognito: User authentication
aws cognito-idp create-user-pool --pool-name MyUserPool
Free Tier: 50,000 monthly active users and 10 GBs of sync storage for 12 months
2️⃣ Business Logic Tier
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Amazon API Gateway: Create REST or WebSocket APIs
aws apigateway create-rest-api --name 'MyServerlessAPI'
Free Tier: 1 million API calls/month for 12 months
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AWS Lambda: Serverless compute to run your business logic
aws lambda create-function --function-name MyFunction --runtime python3.9 --handler lambda_function.lambda_handler --zip-file fileb://function.zip --role arn:aws:iam::123456789012:role/lambda-role
Free Tier: 1 million requests & 400,000 GB-seconds of compute time/month
3️⃣ Data Tier
- Amazon DynamoDB: NoSQL database for storing and managing data
aws dynamodb create-table --table-name MyTable --attribute-definitions AttributeName=ID,AttributeType=S --key-schema AttributeName=ID,KeyType=HASH --billing-mode PAY_PER_REQUEST
Free Tier: 25 GB storage, 200 million requests, 25 WCUs, and 25 RCUs/month
Example Architecture
Users authenticate via Amazon Cognito, interact with the Amazon S3 hosted site, and trigger AWS Lambda functions through Amazon API Gateway. All data is stored in DynamoDB.
You Should Know:
- AWS CLI Setup:
aws configure
Enter your AWS Access Key, Secret Key, and default region.
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Deploying a Lambda Function via CLI:
zip function.zip lambda_function.py aws lambda update-function-code --function-name MyFunction --zip-file fileb://function.zip
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Testing API Gateway Endpoint:
curl -X GET https://your-api-id.execute-api.region.amazonaws.com/prod/resource
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Monitoring with CloudWatch:
aws logs tail /aws/lambda/MyFunction --follow
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Automating Deployments with AWS SAM:
sam deploy --guided
What Undercode Say:
AWS serverless architecture provides a cost-efficient, scalable, and low-maintenance solution for building modern applications. By leveraging the Free Tier, developers can experiment and deploy production-ready applications without upfront costs.
Expected Output:
A fully functional 3-tier serverless architecture deployed on AWS, utilizing:
– S3 + CloudFront for frontend hosting
– API Gateway + Lambda for backend logic
– DynamoDB for persistent storage
Prediction:
Serverless adoption will continue to rise as businesses seek cost-effective, scalable, and low-ops solutions. AWS will likely expand its Free Tier offerings to attract more developers.
Reference:
References:
Reported By: Lefkarag How – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
