Geoproximity Routing Policy

Summary of Geoproximity Routing in AWS

Geoproximity Routing is an AWS Route 53 feature that allows you to route traffic based on the geographic location of your users and your resources. This is particularly useful for optimizing latency and improving user experience by directing users to the nearest or most appropriate resources. Here's a simplified breakdown of key points from the discussion:

Purpose: To route traffic to resources based on geographic location.
Bias Value: A numerical value used to influence traffic flow.
- Increase Bias: To direct more traffic to a resource, you increase its bias value.
- Decrease Bias: To direct less traffic to a resource, you decrease its bias value (using a negative number).
Resource Location: For AWS resources, specify the region. Specify latitude and longitude for non-AWS resources (like on-premises data centers).
Usage Requirement: Requires the advanced Route 53 Traffic Flow setup.

Example and How It Works

Without Bias: With zero bias in both regions (e.g., us-west-1 and us-east-1), the US is divided into two zones. Users are routed to the closest resource based on their location.
With Bias: The dividing line shifts by applying a positive bias (e.g., 50) to us-east-1 and keeping us-west-1 at zero bias. Due to bias, more users, even those geographically closer to us-west-1, may be routed to us-east-1.

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Practical Application

Scenario: You have resources globally and need to shift more traffic to a specific region.
Solution: Adjust the Geoproximity Routing policy by increasing the bias for the target region, attracting more traffic.

Key Takeaway for Exams

Understand that Geoproximity Routing is a strategic tool for managing traffic distribution based on geographic locations and can be adjusted through bias values to meet specific traffic routing requirements.

This feature empowers administrators to finely tune how traffic is distributed across various regions and resources, ensuring users have the best access and experience based on geographic proximity and organizational needs.