To make use of the content of this book, basic prior knowledge of Ceph is expected. If you feel you don't have that knowledge, it is always possible to catch up with the basics by having a quick read of the major components from the official Ceph documentation, http://docs.ceph.com/docs/master/. This book is essentially intended for Ceph cluster administrators. If you are already running a Ceph cluster, this book can help you to gain a better understanding.