Load Balancing & High Availability

Load balancing and high availability (HA) keep applications responsive and resilient by distributing traffic and eliminating single points of failure. This guide explains the core concepts ALCO USA uses to deliver reliable services.

Load Balancing Algorithms

• Round robin: distributes requests evenly in sequence
• Least connections: routes to the server with the fewest active connections
• IP hash: consistently maps a client to the same server
• Weighted distribution: sends more traffic to higher-capacity servers

High Availability Principles

• Failover: automatically switch to a standby system on failure
• Redundancy: duplicate critical components to remove single points of failure
• Clustering: group servers to work as a single, resilient unit
• Health checks: continuously monitor server status and remove unhealthy nodes

Implementation Options

• Hardware load balancers for high-throughput environments
• Software load balancers (such as NGINX or HAProxy) for flexibility
• Cloud-native balancers for elastic, managed scaling

Best Practices

1. Design for no single point of failure
2. Test failover regularly
3. Monitor performance and set alerts
4. Plan capacity for peak demand
5. Document the architecture and recovery steps

Contact

For load balancing and high availability support, reach our team:

Email: Team@alcousa.org

Phone: +1(208) 391-7176

Hours: Monday-Friday, 8 AM - 6 PM EST