API Load Balancing Strategies

Full guide to API load balancing.

Load balancing is a technique for distributing traffic across multiple API servers or instances to ensure high availability, scalability, and performance. Proper load balancing configuration allows you to handle large volumes of traffic, reduce latency, and provide fault tolerance. This guide covers various strategies and algorithms for API load balancing.

Flexibility: Content-Based Routing

Level: Application Level

Usage: Complex routing, SSL termination

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Provides Sticky Sessions - The Same Client Always Goes to the Same Server

Selects the server with the shortest response time.

Health Checks and Service Discovery

Frequently asked questions

What is Graceful Shutdown?

Graceful Shutdown: Properly close connections.

What are Frequently Asked Questions (FAQ)?

Frequently Asked Questions (FAQ)

What is Round Robin for even distribution?

Round Robin is used for evenly distributing traffic, while Weighted Round Robin can be employed when servers have varying capacities. Least Connections is suitable for long-lived connections, and IP Hash facilitates sticky sessions.

When are Sticky Sessions needed?

Sticky sessions are necessary when session state is stored on the server (in-memory sessions). If an external session store like Redis is used, sticky sessions are not required and can complicate load balancing and lead to uneven traffic distribution.

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