What is Global Server Load Balancing (GSLB) and How GeoDNS and Anycast Work?

Grokking Scalable Systems for Interviews

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What is Global Server Load Balancing (GSLB) and How GeoDNS and Anycast Work?

Global Server Load Balancing (GSLB) is a technique for distributing user traffic across multiple servers around the world in order to reduce latency and ensure high availability of applications.

In simpler terms, GSLB directs each user to the best server location (usually the nearest or least-loaded data center) so that websites and services load faster and remain reliable even under heavy load or outages.

What is GSLB and Why Does It Matter?

GSLB is essentially [load balancing](https://www.designgurus

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