Lies, damn lies and DNS performance statistics
How to measure the real performance of a DNS caching resolver
Load on DNS resolvers continue to rise around the world, and in some industries, dramatically so. Service providers must deploy a DNS resolver infrastructure sufficient to handle peak loads today, while providing headroom for future growth. Failure to do so can result in dropped queries and a poor end user experience.
But selecting a resolver that can scale to the load on your network can be challenging. Different resolver architectures perform quite differently in different types of traffic, and vendor performance numbers cannot be relied upon to predict performance in a real network.
This white paper discusses the drivers behind DNS query growth and explains why DNS performance metrics are difficult to obtain and use. In this whitepaper you will learn:
- What is behind the growth in DNS load
- What are the pros and cons of different resolver scalability architectures
- Why vendor’s performance numbers are not very helpful in sizing a resolver infrastructure
- How you can conduct accurate and reliable performance benchmarks to understand resolver performance in your own network environment
