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Vipul Kumar
Vipul Kumar

Posted on • Originally published at knowledge-bytes.com

Types of Load Balancing Algorithms

πŸ”„ Load Balancing Algorithm β€” A load balancing algorithm is a set of predefined rules used by a load balancer to distribute network traffic between servers, ensuring no single server becomes overloaded.

πŸ“Š Dynamic Algorithms β€” These algorithms consider the current state of each server to distribute traffic efficiently. Examples include Least Connection, Weighted Least Connection, Weighted Response Time, and Resource-Based algorithms.

βš–οΈ Static Algorithms β€” These algorithms distribute traffic without considering the current server state. Examples include Round Robin, Weighted Round Robin, and IP Hash.

πŸ” Least Connection β€” This dynamic algorithm routes traffic to servers with the fewest open connections, assuming equal processing power for each connection.

πŸ“ˆ Weighted Round Robin β€” A static algorithm that assigns different weights to servers, allowing those with higher capacity to handle more traffic.

Dynamic Load Balancing

πŸ”„ Least Connection β€” This algorithm directs traffic to servers with the fewest active connections, optimizing for equal processing power across connections.

βš–οΈ Weighted Least Connection β€” Similar to Least Connection, but allows for assigning different weights to servers based on their capacity to handle connections.

⏱️ Weighted Response Time β€” Combines server response time and open connections to determine the best server for routing traffic, ensuring faster user service.

πŸ–₯️ Resource-Based β€” Utilizes an agent on each server to measure available CPU and memory, distributing load based on current resource availability.

Static Load Balancing

πŸ”„ Round Robin β€” Distributes traffic evenly across servers in a sequential manner, often using DNS to rotate through server IPs.

βš–οΈ Weighted Round Robin β€” Enhances Round Robin by assigning weights to servers, allowing those with greater capacity to receive more traffic.

πŸ”’ IP Hash β€” Uses a hash function on the source and destination IP addresses to consistently route traffic to the same server, ensuring session persistence.

Cloudflare Load Balancing

🌐 Global Server Load Balancing β€” Cloudflare uses health checks to direct traffic to healthy servers, optimizing for regional traffic handling to reduce latency.

πŸ” Health Checks β€” Regularly monitors server health to ensure traffic is routed to operational servers, preventing downtime.

πŸ“ Regional Traffic Handling β€” Customizes traffic routing based on geographic location, minimizing travel distance and improving speed.

πŸ”„ Load Balancing as a Service (LBaaS) β€” Offers scalable load balancing solutions that integrate with existing infrastructure, enhancing performance and reliability.

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