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)

Tiering with Ceph

The tiering functionality in Ceph allows you to overlay one RADOS pool over another and let Ceph intelligently promote and evict objects between them. In most configurations, the top-level pool will be comprised of fast storage devices like Solid State Drives (SSDs) and the base pool will be comprised of the slower storage devices like Serial ATA (SATA) or Serial Attached SCSI (SAS) disks. If the working set of your data is of a comparatively small percentage, then this allows you to use Ceph to provide high capacity storage but yet still maintain a good level of performance of frequently accessed data.

In this chapter, we will cover the following topics:

  • How Cephs tiering functionality works
  • What are good use cases for tiering
  • How to configure two pools into a tier
  • Cover various tuning options available for tiering

It's recommended that you should be running at least the Jewel release...