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)


Ceph is largely autonomous in taking care of itself and recovering from failure scenarios, but in some cases human intervention is required. This chapter will look at such common errors and failure scenarios and how to bring Ceph back to working by troubleshooting them. You will learn the following topics:

  • How to correctly repair inconsistent objects
  • How to solve problems with the help of peering
  • How to deal with near_full and too_full OSDs
  • How to investigate errors via Ceph logging
  • How to investigate poor performance
  • How to investigate PGs in a down state