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

Deploying the experimental Ceph BlueStore


BlueStore is a new backend for the Ceph OSD daemons. Its highlights are better performance (roughly 2x for writes), full data checksumming, and built-in compression. Compared to the currently used FileStore backend, BlueStore allows for storing objects directly on the Ceph Block Device without requiring any filesystem interface. BlueStore is the new default storage backend for the Luminous (12.2.z) release and will be used by default when provisioning new OSDs. BlueStore is not considered production ready in Jewel and it is not recommended to run any production Jewel clusters with BlueStore as a backend.

Some of BlueStore's features and enhancements are:

  • RocksDB backend: Metadata is stored in a RocksDB backend as opposed to FileStore's current LevelDB. RocksDB is a multithreaded backend and is much more performant than the current LevelDB backend.
  • Multi-device support: BlueStore can use multiple block devices for storing different data.
  • No large double...