Apache Accumulo burst onto the database scene in 2011 and has established itself as the highest-performance open source database in the world. This unprecedented achievement is a testament to the hard work of the many dedicated developers in the Accumulo community. Aaron Cordova, Billie Rinaldi, and Michael Wall have been leaders in the Accumulo community since its inception, and I can think of no one more qualified to write the definitive book on Accumulo.
The most distinguishing features of the Accumulo database are high performance, scalability, and flexible security. This book does a thorough job of providing the key concepts necessary for developers to utilize these features, while also making the material accessible to a wide audience.
Finally, Aaron, Billie, and Michael have taken great care in creating this text and have incorporated feedback on its development from the entire community. It has been a pleasure to watch this book grow and evolve into the impressive volume that it has become.