Book Image

Mastering Ceph

By : Nick Fisk
Book Image

Mastering Ceph

By: Nick Fisk

Overview of this book

Mastering Ceph covers all that you need to know to use Ceph effectively. Starting with design goals and planning steps that should be undertaken to ensure successful deployments, you will be guided through to setting up and deploying the Ceph cluster, with the help of orchestration tools. Key areas of Ceph including Bluestore, Erasure coding and cache tiering will be covered with help of examples. Development of applications which use Librados and Distributed computations with shared object classes are also covered. A section on tuning will take you through the process of optimisizing both Ceph and its supporting infrastructure. Finally, you will learn to troubleshoot issues and handle various scenarios where Ceph is likely not to recover on its own. By the end of the book, you will be able to successfully deploy and operate a resilient high performance Ceph cluster.
Table of Contents (12 chapters)

What is BlueStore?

BlueStore is a Ceph object store that is primarily designed to address the limitations of filestore, which, as of the Kraken release, is the current object store. Initially, a new object store was being developed to replace filestore, with a highly original name of NewStore. NewStore was a combination of RocksDB, a key value store to store metadata and a standard portable operating system interface (POSIX) filesystem for the actual objects. However, it quickly became apparent that using a POSIX filesystem still introduced high overheads, which was one of the key reasons from trying to move away from filestore.

Thus, BlueStore was born; using raw block devices in combination with RocksDB, a number of problems were solved that had stunted NewStore. The name BlueStore was a reflection of the combination of the words Block and NewStore:


BlueStore is designed to remove...