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AWS RTB Fabric now supports configurable Availability Zone affinity

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AWS·Sep 18, 2026, 03:30 PMFeatureAI-assisted summary

Summary

Adds configurable Availability Zone affinity for responder gateways, letting partners choose routing by requester AZ or any AZ the gateway spans.
Enables better capacity utilization and latency control for DSPs/SSPs without extra RTB Fabric charges.
Feature is GA in all supported AWS regions; see the updated User Guide for fleet requirements.

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Official source Last checked Sep 19, 2026, 5:04 PM

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