Case Study

Powering one of the world’s fastest DNS service providers

Oracle replaced with a scalable AWS solution resulting in 10x resolution capacity and 20x domain hosting capacity


A global information services and technology company wanted to upgrade to a next-gen, scalable, managed Domain Name System (DNS) service with the following objectives:

  • Increase domain hosting capacity by 20x
  • Improve domain resolution capacity by 10x
  • Enhance analytics capabilities to improve customer service
  • Ensure protection against Distributed Denial-of-service (DDoS) attacks
  • Serve 99.9% DNS server queries in less than a millisecond (excluding network latency)
  • Drive double-digit revenue growth

Enabled ~$2 M annual cost savings by reducing Oracle licensing costs


To meet the client’s requirements, the Impetus team redesigned their existing monolithic system to a scalable microservices-based system on AWS. We identified reusable components from both customer-facing and internal systems and converted them into microservices. In addition, we broke down their vast Oracle database into smaller data stores based on data type and refactored the data using specific microservices.

Some highlights:

  • Created a secure, scalable solution leveraging 25+ AWS offerings including Amazon Elastic Compute Cloud (EC2), Simple Storage Service (S3), DynamoDB, Virtual Private Cloud (VPC), ElastiCache, Elastic Load Balancing, Auto Scaling Groups, CloudWatch, CloudTrail, CloudFront, and Relationship Database Service (RDS)
  • Replaced Oracle-based leaf data nodes with NoSQL-based data nodes to reduce Oracle licensing cost
  • Enabled single-click automated deployment of application releases using Jenkins and Terraform
  • Scaled from 18 to 64 resolution nodes and enhanced resolution capacity by 10x to manage up to 800 billion queries per day
  • Consolidated Top-Level Domain (TLD) and Second-level Domain (SLD) DNS platforms to avoid code base and infrastructure redundancy
  • Increased domain hosting capacity from 2.5 to 50 million zones by rearchitecting the data store and implementing hash partitioning
  • Developed microservices for auditing operations and storing audit data in Oracle
  • Developed reporting APIs and enabled generation of reporting data and storage in Greenplum

Reduced release cycle from 3 days to 15 minutes using CI/CD pipelines


Switching to a scalable microservices based system on AWS enabled the global DNS provider to reduce annual licensing costs by ~$2 M, and improved reporting and auditing visibility for better decision-making. The client was able to increase capacity by 10x to manage up to 800 million queries and host 100 million unique domains. The solution also powered latency of <1 millisecond for 99.95% queries, which enabled the client to become one of the world’s fastest DNS servers.

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