Networking

HAProxy

HAProxy is a highly respected load balancer and proxy, especially in performance-sensitive environments. It is often used for TCP and HTTP balancing with strong control over routing and health checks.

Load BalancerProxyTraffic

Key Concepts

Excellent for load balancing and proxying traffic.

Supports health checks and flexible routing behavior.

Works well in high-throughput environments.

Common Interview Questions

What is HAProxy used for?

How does a load balancer improve system reliability?

What is the difference between Layer 4 and Layer 7 balancing?

Use Case

Use HAProxy when you need robust traffic balancing and proxy control for high-performance services.

Common Use Cases

Balancing traffic across application servers.

Handling high-throughput web and TCP traffic.

Building resilient reverse proxy layers in production.

Pros

Very strong performance and reliability.

Flexible balancing and traffic control.

Widely trusted in production networking setups.

Cons

Configuration may feel lower-level than some alternatives.

Requires careful tuning in advanced environments.

Mostly focused on proxying and balancing rather than broader platform concerns.