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)

Why was it needed?

The current object store in Ceph, Filestore, has a number of limitations which have started to limit the scale at which Ceph can operate and features that it can offer. Following are some of the main reasons why Bluestore was needed.

Ceph's requirements

An object in Ceph along with its data also has certain metadata associated with it, and it's crucial that both the data and metadata are updated atomically. If either of this metadata or data is updated without the other, the whole consistency model of Ceph is at risk. To ensure that these updates occur atomically, they need to be carried out in a single transaction.

Filestore limitations...