– Millions of API queries per day and 2-5 billion DNS queries per month

– How Rails, Go and Erlang are being used along with why they were chosen

– How DNS lookups happen and the importance of DDoS protection

– The Erlang service has ~10k LOC and was written before Elixir existed

– Go is responsible for a lot of glue services

– A monolithic Rails app (server rendered templates) powers the web dashboard

– Sidekiq (Enterprise), Redis, PostgreSQL and all services run on Ubuntu LTS

– For cloud hosted services they end up on AWS or Heroku depending on what it is

– There’s 2 PostgreSQL instances and only the Rails app writes to it

– nginx is sitting in front of the Rails app

– Topping out at 5-10k requests per second through the Erlang service

– You can spin things up locally with or without Docker

– Datadog is used to help view metrics and logs to detect potential issues

– What exactly is Anycast?

– Picking out hardware for their data centers (roughly 70 physical servers)

– Chef is being used to configure all of the servers

– What the process is like to develop something and then deploy it to production

– Toggling feature flags, managing database migrations at scale and API versioning

– How developers add new features through pull requests and then deploy code

– Stripe handles all of the payments for each subscription tier

– Handling database backups with snapshots and streaming the data offsite

– Bugsnag is used for error handling and logs get written to Datadog as well

– Everyone’s been working remotely from day 1 and there is no centralized office

– Best tips? Have good processes in place as you grow in size

– Check out https://dnsimple.com/ and you can find Anthony on Twitter