Book Image

Ceph Cookbook - Second Edition

By : Vikhyat Umrao, Karan Singh, Michael Hackett
Book Image

Ceph Cookbook - Second Edition

By: Vikhyat Umrao, Karan Singh, Michael Hackett

Overview of this book

Ceph is a unified distributed storage system designed for reliability and scalability. This technology has been transforming the software-defined storage industry and is evolving rapidly as a leader with its wide range of support for popular cloud platforms such as OpenStack, and CloudStack, and also for virtualized platforms. Ceph is backed by Red Hat and has been developed by community of developers which has gained immense traction in recent years. This book will guide you right from the basics of Ceph , such as creating blocks, object storage, and filesystem access, to advanced concepts such as cloud integration solutions. The book will also cover practical and easy to implement recipes on CephFS, RGW, and RBD with respect to the major stable release of Ceph Jewel. Towards the end of the book, recipes based on troubleshooting and best practices will help you get to grips with managing Ceph storage in a production environment. By the end of this book, you will have practical, hands-on experience of using Ceph efficiently for your storage requirements.
Table of Contents (15 chapters)

Creating a cache tier

In the last recipe, we created a pool, cache-pool, based on SSDs. We will now use this pool as a cache tier for the erasure-coded pool, EC-pool, that we created earlier in this chapter:

The upcoming instructions will guide you through the creation of a cache tier with the writeback mode and how to set the overlay with an EC-pool.

How to do it...

Following this set of steps, we will create a cache tier for our erasure-coded pool:

  1. Create a cache tier that will associate storage-pools with cache-pools. The syntax is ceph osd tier add <storage_pool> <cache_pool>:
        # ceph osd tier add EC-pool cache-pool
  1. Set the cache mode as either writeback or read-only. In this demonstration, we will...