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

Introduction


Ceph is currently the hottest software-defined storage (SDS) technology and is shaking up the entire storage industry. It is an open source project that provides unified software-defined solutions for block, file, and object storage. The core idea of Ceph is to provide a distributed storage system that is massively scalable and high performing with no single point of failure. From the roots, it has been designed to be highly scalable (up to the exabyte level and beyond) while running on general-purpose commodity hardware.

Ceph is acquiring most of the traction in the storage industry due to its open, scalable, and reliable nature. This is the era of cloud computing and software-defined infrastructure, where we need a storage backend that is purely software-defined and, more importantly, cloud-ready. Ceph fits in here very well, regardless of whether you are running a public, private, or hybrid cloud.

Today's software systems are very smart and make the best use of commodity hardware to run gigantic-scale infrastructures. Ceph is one of them; it intelligently uses commodity hardware to provide enterprise-grade robust and highly reliable storage systems.

Ceph has been raised and nourished with the help of the Ceph upstream community with an architectural philosophy that includes the following:

  • Every component must scale linearly
  • There should not be any single point of failure
  • The solution must be software-based, open source, and adaptable
  • The Ceph software should run on readily available commodity hardware
  • Every component must be self-managing and self-healing wherever possible

The foundation of Ceph lies in objects, which are its building blocks. Object storage such as Ceph is the perfect provision for current and future needs for unstructured data storage. Object storage has its advantages over traditional storage solutions; we can achieve platform and hardware independence using object storage. Ceph plays meticulously with objects and replicates them across the cluster to avail reliability; in Ceph, objects are not tied to a physical path, making object location independent. This flexibility enables Ceph to scale linearly from the petabyte to the exabyte level.

Ceph provides great performance, enormous scalability, power, and flexibility to organizations. It helps them get rid of expensive proprietary storage silos. Ceph is indeed an enterprise-class storage solution that runs on commodity hardware; it is a low-cost yet feature-rich storage system. Ceph's universal storage system provides block, file, and object storage under one hood, enabling customers to use storage as they want.

In the following section, we will learn about Ceph releases.

Ceph is being developed and improved at a rapid pace. On July 3, 2012, Sage announced the first LTS release of Ceph with the code name Argonaut. Since then, we have seen 12 new releases come up. Ceph releases are categorized as Long Term Support (LTS), and stable releases and every alternate Ceph release are LTS releases. For more information, visit https://Ceph.com/category/releases/.

Ceph release name

Ceph release version

Released On

Argonaut

V0.48 (LTS)

July 3, 2012

Bobtail

V0.56 (LTS)

January 1, 2013

Cuttlefish

V0.61

May 7, 2013

Dumpling

V0.67 (LTS)

August 14, 2013

Emperor

V0.72

November 9, 2013

Firefly

V0.80 (LTS)

May 7, 2014

Giant

V0.87.1

Feb 26, 2015

Hammer

V0.94 (LTS)

April 7, 2015

Infernalis

V9.0.0

May 5, 2015

Jewel

V10.0.0 (LTS)

Nov, 2015

Kraken

V11.0.0

June 2016

Luminous

V12.0.0 (LTS)

Feb 2017

 

Note

Here is a fact: Ceph release names follow an alphabetic order; the next one will be an M release. The term Ceph is a common nickname given to pet octopuses and is considered a short form of Cephalopod, which is a class of marine animals that belong to the mollusk phylum. Ceph has octopuses as its mascot, which represents Ceph's highly parallel behavior, similar to octopuses.