Global server load balancing definition

Global server load balancing

(also GSLB)

Global server load balancing, often abbreviated as GSLB, refers to distributing internet traffic across multiple servers geographically distributed worldwide. GSLB ensures optimal performance by directing users to the closest or best-performing server based on their location and the server’s current load, minimizing latency and reducing the risk of server overload.

Global server load balancing examples

Content delivery networks (CDNs): Global server load balancing is a key component of CDNs, which store copies of data at various points in a network to maximize bandwidth and access speed for users.
Disaster recovery: In the event of a server failure, GSLB can shift traffic to other functioning servers, minimizing disruption and downtime.

Advantages and disadvantages of global server load balancing

Pros:

Improved performance: By directing traffic to the nearest or best-performing server, GSLB can significantly reduce latency and improve user experience.
Redundancy and resilience: GSLB provides failover capabilities, enhancing the robustness of network infrastructure by enabling traffic redirection in the event of server failures.

Cons:

Complexity: Implementing a GSLB solution requires careful planning and configuration. Misconfigurations can lead to traffic routing inefficiencies.
Cost: Depending on the scale and specific requirements, setting up a global server load-balancing infrastructure can be expensive.

Using global server load balancing

It’s important to periodically review your GSLB setup to ensure it remains efficient as user demand and network conditions change.
Consider combining GSLB with other techniques like local server load balancing and content delivery networks to optimize network performance and reliability.