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 the Ceph Filesystem and MDS


The Ceph Filesystem offers the POSIX-compliant distributed filesystem of any size that uses Ceph RADOS to store its data. To implement the Ceph Filesystem, you need a running Ceph storage cluster and at least one Ceph Metadata Server (MDS) to manage its metadata and keep it separated from data, which helps in reducing complexity and improves reliability. The following diagram depicts the architectural view of Ceph FS and its interfaces:

The libcephfs libraries play an important role in supporting its multiple client implementations. It has the native Linux kernel driver support, and thus clients can use native filesystem mounting, for example, using the mount command. It has tight integration with SAMBA and support for CIFS and SMB. Ceph FS extends its support to Filesystem in USErspace (FUSE) using cephfuse modules. It also allows direct application interaction with the RADOS cluster using the libcephfs libraries. Ceph FS is gaining popularity as...