AWS Boosts US East Region With New Outage-Proof DNS

Key points:

• Amazon Web Services (AWS) has introduced a new Domain Name Service (DNS) resiliency feature to improve reliability and reduce service disruptions in its US East region.
• The new feature, Accelerated recovery for managing public DNS records, aims to address DNS issues and provide a 60-minute recovery time objective (RTO) during future outages.
• The feature could put AWS ahead of other hyperscalers, such as Azure, GCP, and Cloudflare, in terms of DNS resiliency capabilities.

Amazon Web Services (AWS) has recently introduced a new DNS resiliency feature designed to improve reliability and reduce service disruptions in its US East region. This move comes after a major service disruption in October, which was caused by a DNS failure that affected over 70 AWS services and impacted a large section of its customer base. The disruption was so severe that it took hours to restore DNS manually, and the full recovery of the service took even longer due to delayed network configurations and backlog clearing.

The new DNS resiliency feature, named Accelerated recovery for managing public DNS records, has been added to Route 53, AWS’s cloud-based web service that helps translate human-friendly domain names into numeric IP addresses. This feature is designed to provide a 60-minute recovery time objective (RTO) during future outages, which means that customers can continue making DNS changes and provisioning infrastructure even during regional outages.

According to HFS Research’s associate practice leader Akshat Tyagi, the new feature aims to fix the gap between the control plane and data plane. The control plane is the management layer that decides how traffic should be directed, while the data plane carries out those instructions by actually delivering DNS queries to their destination. Tyagi noted that in big AWS incidents, the DNS data plane usually stays up, but the control plane can stall, which means that customers can’t update DNS fast enough to reroute traffic.

The US East region has continued to be a major architectural chokepoint for AWS, with the control plane for many global AWS services depending on that region. Tyagi warned that the new feature might not be enough to stop the fallout of future outages, although it fixes one of several critical gaps. He suggested that AWS can take additional measures, such as shipping more opinionated blueprints for multi-region DNS and control-plane isolation, to help customers avoid reinventing complex patterns after each incident or fallout.

The new DNS resiliency feature could put AWS ahead of other hyperscalers, such as Azure, GCP, and Cloudflare, in terms of DNS resiliency capabilities. Tyagi noted that while these rivals operate strong, globally distributed DNS systems, none of them commit to a defined recovery time for DNS control-plane updates during a regional outage. This means that AWS is now leading the way in providing a guaranteed recovery time for DNS control-plane updates, which is a critical aspect of cloud computing and Microsoft’s competitors.

As Microsoft and its companies, such as Azure, continue to evolve and improve their services, it’s essential to keep an eye on the developments in the cloud computing industry. The introduction of the new DNS resiliency feature by AWS is a significant move, and it will be interesting to see how Microsoft and other hyperscalers respond to this development. With the increasing importance of cloud computing and reliability, it’s crucial for companies like AWS and Azure to prioritize DNS resiliency and provide the best possible services to their customers.

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