AWS Solutions Architect Online Training with Certification - Visualpath

1. Elastic Load Balancing in Multi-Tier Architecture Efficient Traffic Distribution and High Availability +91-7032290546 www.visualpath.in

2. Introduction to Multi-Tier Architecture • Definition of Multi-Tier Architecture • A layered approach where each tier (e.g., web, application, database) serves a specific function. • Example: • Web Tier: User interface and web requests. • Application Tier: Business logic and processing. • Database Tier: Data storage and retrieval. • Importance: • Scalability, redundancy, and improved fault tolerance. +91-7032290546 www.visualpath.in

3. What is Elastic Load Balancing (ELB)? • Definition: • ELB automatically distributes incoming application traffic across multiple targets (e.g., EC2 instances, containers). • Types of ELB: • Application Load Balancer (ALB) • Network Load Balancer (NLB) • Classic Load Balancer (CLB) +91-7032290546 www.visualpath.in

4. Role of ELB in Multi-Tier Architecture • Traffic Distribution: • Distributes incoming traffic across multiple tiers, ensuring no single resource is overloaded. • High Availability: • Ensures resources are available by rerouting traffic in case of failures. • Scalability: • Automatically adjusts traffic distribution as servers scale up or down. +91-7032290546 www.visualpath.in

5. Benefits of ELB in Multi-Tier Architecture • Improved Performance: • Minimizes latency and improves application responsiveness. • Fault Tolerance: • Routes traffic away from unhealthy resources, improving uptime. • Security: • Integrates with security features (e.g., SSL termination, AWS WAF). • Simplified Maintenance: • Reduces downtime during maintenance or deployment processes. +91-7032290546 www.visualpath.in

6. How ELB Works in a Multi-Tier Setup • Traffic Flow: • Client sends request to the web tier. • Web tier forwards the request to the application tier via ELB. • Application tier interacts with the database tier. • ELB’s Role: • Balances load at each layer, ensuring seamless communication between tiers. +91-7032290546 www.visualpath.in

7. Types of Load Balancers in Multi-Tier Architectures • Application Load Balancer (ALB): • Best for HTTP/HTTPS traffic. • Works at the application layer (Layer 7). • Supports path-based and host-based routing. • Network Load Balancer (NLB): • Best for high-performance, low-latency applications. • Operates at the network layer (Layer 4). • Classic Load Balancer (CLB): • Older type, supports both Layer 4 and Layer 7. +91-7032290546 www.visualpath.in

8. Example Architecture with ELB • Diagram: • Illustrate a multi-tier architecture with ELB at each layer (web, application, database). • Show how traffic flows through each layer and is balanced by ELB. • Explanation: • ELB ensures optimal traffic routing, maintaining high availability across all layers. +91-7032290546 www.visualpath.in

9. Conclusion and Best Practices Summary: • ELB ensures that a multi-tier architecture scales efficiently, maintains high availability, and improves performance. Best Practices: • Use ALB for HTTP/HTTPS-based applications. • Implement health checks at each tier for automatic rerouting. • Combine ELB with auto-scaling groups for dynamic traffic management. Final Thought: • Elastic Load Balancing is crucial for managing complex, scalable, and highly available applications in a multi-tier setup. +91-7032290546 www.visualpath.in

10. For More Information About AWS Solutions Architect Certification Address:- Flat no: 205, 2nd Floor, Nilagiri Block, Aditya Enclave, Ameerpet, Hyderabad-16 Ph. No: +91-998997107 Visit: www.visualpath.in E-Mail: online@visualpath.in +91-7032290546 www.visualpath.in

11. Thank You • Visit: www.visualpath.in +91-7032290546 www.visualpath.in