Book Image

Mastering Ceph, - Second Edition

By : Nick Fisk
Book Image

Mastering Ceph, - Second Edition

By: Nick Fisk

Overview of this book

Ceph is an open source distributed storage system that is scalable to Exabyte deployments. This second edition of Mastering Ceph takes you a step closer to becoming an expert on Ceph. You’ll get started by understanding the design goals and planning steps that should be undertaken to ensure successful deployments. In the next sections, you’ll be guided through setting up and deploying the Ceph cluster with the help of orchestration tools. This will allow you to witness Ceph’s scalability, erasure coding (data protective) mechanism, and automated data backup features on multiple servers. You’ll then discover more about the key areas of Ceph including BlueStore, erasure coding and cache tiering with the help of examples. Next, you’ll also learn some of the ways to export Ceph into non-native environments and understand some of the pitfalls that you may encounter. The book features a section on tuning that will take you through the process of optimizing both Ceph and its supporting infrastructure. You’ll also learn to develop applications, which use Librados and distributed computations with shared object classes. Toward the concluding chapters, you’ll learn to troubleshoot issues and handle various scenarios where Ceph is not likely to recover on its own. By the end of this book, you’ll be able to master storage management with Ceph and generate solutions for managing your infrastructure.
Table of Contents (18 chapters)
Free Chapter
Section 1: Planning And Deployment
Section 2: Operating and Tuning
Section 3: Troubleshooting and Recovery


Block-level storage mimics the type of storage that would have originally been provided by hard disks and, later, storage arrays. Typically, block storage is exported via storage arrays via fiber channel or iSCSI onto hosts where a local filesystem is then formatted onto the block device. In some cases, this filesytem may be of the clustered type, and can allow the block device to be presented across many hosts at the same time. It's important to note that even though block-based storage allows you to present it to multiple hosts, this should only be done if the filesystem supports it; otherwise, corruption of the filesystem is highly likely.

One use of block storage that has seen a massive expansion in recent years has been through the use of virtualization. Block storage is quite often presented to a hypervisor that's formatted with a filesystem. One or more...