AWS Architecture Design Examples 🏗️

Practical AWS architecture design examples with focus on real-world use cases, trade-offs, and best practices.

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🎯 Purpose

This repository strengthens architecture design thinking by documenting how AWS solutions are structured, including key decisions and trade-offs across:

• 💰 Cost Optimization
• 🔒 Security
• ⚡ High Availability
• 🚀 Performance
• 📈 Scalability

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📚 Architecture Examples

1. Simple Web Application

Use Case: Small business website or blog

Components:

• Single EC2 instance
• RDS database
• S3 for static assets
• CloudFront CDN

Best For: Startups, MVPs, low-traffic applications

Monthly Cost: ~$50-100

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2. Highly Available Web Application

Use Case: Production-grade web application with 99.9% uptime

Components:

• Auto Scaling Group (multi-AZ)
• Application Load Balancer
• RDS Multi-AZ
• ElastiCache
• CloudFront

Best For: E-commerce, SaaS applications, enterprise workloads

Monthly Cost: ~$500-1000

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3. Secure VPC Design

Use Case: Security-focused network architecture

Components:

• Multi-tier VPC (public/private subnets)
• NAT Gateway
• Security Groups & NACLs
• VPC Flow Logs
• Bastion Host

Best For: Compliance-driven applications, enterprise security requirements

Monthly Cost: ~$100-200

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🏗️ Design Patterns Covered

Pattern	Use Case	Complexity
Simple Architecture	Quick MVP, learning	⭐ Easy
High Availability	Production workloads	⭐⭐⭐ Moderate
Secure Networking	Enterprise, compliance	⭐⭐⭐⭐ Advanced

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📖 How to Use This Repository

For Learning:

1. Read each design document sequentially
2. Understand the trade-offs explained
3. Compare simple vs HA architectures
4. Note cost implications

For Reference:

• Use as templates for your projects
• Adapt components to your needs
• Follow security best practices
• Understand cost optimization strategies

For Interviews:

• Practice explaining architectural decisions
• Understand availability trade-offs
• Discuss cost vs performance balance
• Articulate security considerations

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🎓 Key Concepts Explained

Trade-offs in Each Design:

Simple Architecture:

• ✅ Low cost
• ✅ Quick to deploy
• ❌ Single point of failure
• ❌ Limited scalability

High Availability:

• ✅ 99.9%+ uptime
• ✅ Auto-scaling
• ❌ Higher cost
• ❌ More complex

Secure VPC:

• ✅ Defense in depth
• ✅ Network isolation
• ❌ Operational overhead
• ❌ Additional cost (NAT, logs)

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🛠️ Architecture Decision Framework

When designing AWS architectures, consider:

1. Requirements Gathering

• What's the expected traffic?
• What's the uptime requirement (SLA)?
• What's the budget?