Load BalancingRoutingHigh Availability

Load Balancing Algorithms

Compare Round Robin, Least Connections, and IP Hash algorithms for distributing network traffic.

Abstract Algorithms

Abstract Algorithms

Jul 2, 2026Β·1 min readΒ·Intermediate
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Quick Take

Load balancers distribute incoming requests across a pool of healthy backend servers to ensure scalability and reliability. πŸ“Š Common Algorithms 1. Round Robin Distributes requests sequentially in a c

Load balancers distribute incoming requests across a pool of healthy backend servers to ensure scalability and reliability.

πŸ“Š Common Algorithms

1. Round Robin

Distributes requests sequentially in a circular order.

  • Best for: Homogeneous servers with equal capacity and short-lived requests.

2. Least Connections

Directs requests to the server with the fewest active sessions.

  • Best for: Long-lived connections (like databases, streaming, or WebSockets) where server load varies heavily.

3. IP Hash

Hashes the client's IP address to map them consistently to the same backend server.

  • Best for: Stateful applications requiring session persistence ("sticky sessions").
Client IP ──► [ Hash Function ] ──► Node Index ──► Server A (Session Preserved)

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