AWS RTB Fabric now supports configurable Availability Zone affinity

Published
September 18, 2026
https://aws.amazon.com/about-aws/whats-new/2026/09/aws-rtb-fabric-configurable-availability-zone-affinity/

AWS RTB Fabric Updates

AWS RTB Fabric now supports configurable Availability Zone (AZ) affinity for responder gateways. You can now configure how your partners connect to your responder gateway: either in their own Availability Zone or to any Availability Zone that the gateway spans. This helps advertising technology (AdTech) companies use their infrastructure more efficiently—with no extra charges on RTB Fabric.

Demand-side platforms (DSPs) and supply-side platforms (SSPs) can now run their bidding systems across multiple Availability Zones. You can set a client routing policy to control this: prefer the requester's own AZ to avoid added latency of crossing a boundary, or use every AZ that the responder gateway spans to give each requester access to more gateway capacity.

What to do

Configurable Availability Zone affinity is available in all AWS Regions where AWS RTB Fabric is available. AWS RTB Fabric helps you connect with your AdTech partners while delivering single-digit millisecond latency through a private, high-performance network environment. RTB Fabric reduces standard cloud networking costs by up to 80% and does not require upfront commitments.

AWS RTB Fabric is generally available in the following AWS Regions: US East (N. Virginia), US West (Oregon), Asia Pacific (Singapore), Asia Pacific (Tokyo), Europe (Frankfurt), and Europe (Ireland). See the AWS RTB Fabric Product Page to learn more.




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