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Ceph Cookbook

You're reading from Ceph Cookbook Practical recipes to design, implement, operate, and manage Ceph storage systems

Product type Paperback

Published in Nov 2017

Publisher Packt

ISBN-13 9781788391061

Length 466 pages

Edition 2nd Edition

Languages

C++

Tools

Ceph

Concepts

Cloud Computing

Authors (3):

Karan Singh

Hackett

Umrao

View More author details

Table of Contents (23) Chapters

Title Page

Credits

Disclaimer

Foreword

About the Authors

About the Reviewer

www.PacktPub.com

Customer Feedback

Preface

1. Ceph – Introduction and Beyond FREE CHAPTER

2. Working with Ceph Block Device

3. Working with Ceph and OpenStack

4. Working with Ceph Object Storage

5. Working with Ceph Object Storage Multi-Site v2

6. Working with the Ceph Filesystem

7. Monitoring Ceph Clusters

8. Operating and Managing a Ceph Cluster

9. Ceph under the Hood

10. Production Planning and Performance Tuning for Ceph

11. The Virtual Storage Manager for Ceph

12. More on Ceph

13. An Introduction to Troubleshooting Ceph

14. Upgrading Your Ceph Cluster from Hammer to Jewel

Placement Group states

Ceph PGs may exhibit several states based on what's happening inside the cluster at that point in time. To know the state of a PG, you can see the output of the command ceph status. In this recipe, we will cover these different states of PGs and understand what each state actually means:

Creating: The PG is being created. This generally happens when pools are being created or when PGs are increased for a pool.
Active: All PGs are active, and requests to the PG will be processed.
Clean: All objects in the PG are replicated the correct number of times.
Down: A replica with necessary data is down, so the PG is offline (down).
Replay: The PG is waiting for clients to replay operations after an OSD has crashed.
Splitting: The PG is being split into multiple PGs. Usually, a PG attains this state when PGs are increased for an existing pool. For example, if you increase the PGs of a pool rbd from 64 to 128, the existing PGs will split, and some of their objects will be moved to...

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Authors (3)

Karan Singh

Karan Singh

Karan is an IT expert and passionate tech enthusiast living with his beautiful wife Monika in Finland. He holds Honours degree in Bachelor of Computer Science and a Master degree in System Engineering from BITS, Pilani. Apart from this, he is a certified professional for technologies like OpenStack, NetApp and Oracle Solaris. Karan is currently working as a System Specialist of Storage and Cloud Platform for CSC - IT Center for Science Ltd. focusing all his energies on providing IaaS cloud solutions based on OpenStack and Ceph and building economic multi-petabyte storage system using Ceph. Karan possesses a rich skill set and working experience of a variety of cloud technologies. He devotes a part of his time to R&D and learning technologies. He is also the author of the very first book on Ceph titled Learning Ceph, published in 2014. Karan possesses extensive system administration skills and has excellent working experience on a variety of Unix environments, backup, enterprise storage systems, and cloud platforms. When not working on Ceph and OpenStack, Karan can be found working with Configuration management, containers and devops related tools. He loves writing about technologies and is an avid blogger. You can reach him on Twitter.

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Hackett

Hackett

Michael Hackett is a storage and SAN expert in customer support. He has been working on Ceph and storage-related products for over 12 years. Apart from this, he holds several storage and SAN-based certifications and prides himself on his ability to troubleshoot and adapt to new complex issues. Michael is currently working at Red Hat, based in Massachusetts, where he is a principal software maintenance engineer for Red Hat Ceph and the technical product lead for the global Ceph team. Michael lives in Massachusetts with his wife, Nicole, his two sons, and their dog. He is an avid sports fan and enjoys time with his family.

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Umrao

Umrao

Vikhyat Umrao has 9 years of experience with distributed storage products as a sustenance engineer and in the last couple of years, he has been working on software-defined storage technology, with specific expertise in Ceph Unified Storage. He has been working on Ceph for over 3 years now and in his current position at Red Hat, he focuses on the support and development of Ceph to solve Red Hat Ceph storage customer issues and upstream reported issues. He is based in the Greater Boston area, where he is a principal software maintenance engineer for Red Hat Ceph Storage. Vikhyat lives with his wife, Pratima, and he likes to explore new places.

See other products by Umrao

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