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)

Algorithms and profiles

There are a number of different erasure plugins you can use to create your erasure-coded pool.


The default erasure plugin in Ceph is the Jerasure plugin, which is a highly optimized open source erasure coding library. The library has a number of different techniques that can be used to calculate the erasure codes. The default is Reed-Solomon and provides good performance on modern processors which can accelerate the instructions that the technique uses. Cauchy is another technique in the library; it is a good alternative to Reed- Solomon and tends to perform slightly better. As always, benchmarks should be conducted before storing any production data on an erasure-coded pool to identify which technique best suits your workload.