Teads is #1 in Video Ads. Read how Teads handles up to ~1 million requests/s with Apache Cassandra. How do we tuned Cassandra servers and clients. What issues we faced during the last year. How do we provision our clusters. Which tools are used: Datadog for monitoring and alerting, Cassandra reaper, Rundeck, Sumologic, cassandra_snapshotter. Why do we need a fork.