Wildcat is a high-performance embedded key-value database written in Go, featuring modern design principles such as LSM tree architecture and MVCC for efficient read and write operations. It supports ACID transactions, offers configurable durability levels, and provides comprehensive iteration capabilities, making it suitable for applications requiring immediate consistency and durability. Users can join a community for support and access resources for development and benchmarking.

The article presents a method for creating a columnar table on Amazon S3 that mimics Multi-Version Concurrency Control (MVCC) for efficient data management. It highlights the benefits of constant-time deletes and discusses the implementation details necessary for achieving optimal performance in data storage and retrieval.