Announcing Prometheus 2.0

Prometheus 2.0 is a major release focused on significantly improving performance and scalability, particularly for dynamic modern environments like Kubernetes. It features a new time series database that reduces CPU usage by 20-40% and disk space by 33-50% compared to 1.8, while also introducing improved staleness handling and built-in backup support. The release maintains Prometheus' core philosophy of simplicity and ease of use, but with a more robust and efficient storage subsystem designed for future extensibility.