Book Image

Ceph: Designing and Implementing Scalable Storage Systems

By : Michael Hackett, Vikhyat Umrao, Karan Singh, Nick Fisk, Anthony D'Atri, Vaibhav Bhembre
Book Image

Ceph: Designing and Implementing Scalable Storage Systems

By: Michael Hackett, Vikhyat Umrao, Karan Singh, Nick Fisk, Anthony D'Atri, Vaibhav Bhembre

Overview of this book

This Learning Path takes you through the basics of Ceph all the way to gaining in-depth understanding of its advanced features. You’ll gather skills to plan, deploy, and manage your Ceph cluster. After an introduction to the Ceph architecture and its core projects, you’ll be able to set up a Ceph cluster and learn how to monitor its health, improve its performance, and troubleshoot any issues. By following the step-by-step approach of this Learning Path, you’ll learn how Ceph integrates with OpenStack, Glance, Manila, Swift, and Cinder. With knowledge of federated architecture and CephFS, you’ll use Calamari and VSM to monitor the Ceph environment. In the upcoming chapters, you’ll study the key areas of Ceph, including BlueStore, erasure coding, and cache tiering. More specifically, you’ll discover what they can do for your storage system. In the concluding chapters, you will develop applications that use Librados and distributed computations with shared object classes, and see how Ceph and its supporting infrastructure can be optimized. By the end of this Learning Path, you'll have the practical knowledge of operating Ceph in a production environment. This Learning Path includes content from the following Packt products: • Ceph Cookbook by Michael Hackett, Vikhyat Umrao and Karan Singh • Mastering Ceph by Nick Fisk • Learning Ceph, Second Edition by Anthony D'Atri, Vaibhav Bhembre and Karan Singh
Table of Contents (27 chapters)
Title Page
About Packt
Contributors
Preface
Index

Creating tiers in Ceph


To test Ceph tiering functionality, two RADOS pools are required. If you are running these examples on a laptop or desktop hardware, although spinning disk-based OSDs can be used to create the pools; SSDs are highly recommended if there is any intention to read and write data. If you have multiple disk types available in your testing hardware, then the base tier can exist on spinning disks and the top tier can be placed on SSDs.

Let's create tiers using the following commands, all of which make use of the Ceph tier command:

  1. Create two RADOS pools:
       ceph osd pool create base 64 64 replicated

       ceph osd pool create top 64 64 replicated

The preceding commands give the following output:

  1. Create a tier consisting of the two pools:
       ceph osd tier add base top

The preceding command gives the following output:

  1. Configure the cache mode:
       ceph osd tier cache-mode top writeback

The preceding command gives the following output:

  1. Make the top tier and overlay of the...