Application Load Balancer vs Classic Load Balancing

Developers should use Application Load Balancer when building scalable web applications, APIs, or microservices on AWS that require intelligent traffic routing, SSL/TLS termination, or integration with serverless components meets developers should learn classic load balancing when working with legacy aws environments or applications that rely on its specific features, such as tcp/ssl load balancing or integration with ec2-classic networks. Here's our take.

Application Load Balancer

Nice Pick

Developers should use Application Load Balancer when building scalable web applications, APIs, or microservices on AWS that require intelligent traffic routing, SSL/TLS termination, or integration with serverless components

Pros

• It is particularly useful for applications with dynamic scaling needs, such as those using containers (ECS/EKS) or serverless functions (Lambda), where ALB can route requests based on content like URL paths or host headers
• Related to: aws-ec2, aws-lambda

Cons

• Specific tradeoffs depend on your use case

Classic Load Balancing

Developers should learn Classic Load Balancing when working with legacy AWS environments or applications that rely on its specific features, such as TCP/SSL load balancing or integration with EC2-Classic networks

Pros

• It is useful for scenarios where minimal configuration and cost-effectiveness are priorities, but it lacks the advanced capabilities of newer services like Application Load Balancer (ALB) or Network Load Balancer (NLB)
• Related to: aws-application-load-balancer, aws-network-load-balancer

Cons

• Specific tradeoffs depend on your use case

The Verdict

Use Application Load Balancer if: You want it is particularly useful for applications with dynamic scaling needs, such as those using containers (ecs/eks) or serverless functions (lambda), where alb can route requests based on content like url paths or host headers and can live with specific tradeoffs depend on your use case.

Use Classic Load Balancing if: You prioritize it is useful for scenarios where minimal configuration and cost-effectiveness are priorities, but it lacks the advanced capabilities of newer services like application load balancer (alb) or network load balancer (nlb) over what Application Load Balancer offers.

The Bottom Line

Application Load Balancer wins

Developers should use Application Load Balancer when building scalable web applications, APIs, or microservices on AWS that require intelligent traffic routing, SSL/TLS termination, or integration with serverless components