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

Understanding Ceph object storage


Object storage cannot be directly accessed by an operating system as a disk of a filesystem. Rather, it can only be accessed via API at the application level. Ceph is a distributed object storage system that provides an object storage interface via the Ceph object gateway, also known as the RADOS Gateway (RGW) interface, which has been built on top of the Ceph RADOS layer. The RGW uses librgw (RADOS Gateway Library) and librados, allowing applications to establish a connection with the Ceph object storage. The RGW provides applications with a RESTful S3 / Swift-compatible API interface to store data in the form of objects in the Ceph cluster. Ceph also supports multitenant object storage, accessible via RESTful API. In addition to this, the RGW also supports Ceph Admin APIs that can be used to manage the Ceph storage cluster using native API calls.

The librados software libraries are very flexible and can allow user applications to directly access the Ceph...