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  • Book Overview & Buying Learning Ceph
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Learning Ceph

Learning Ceph - Second Edition

By : Vaibhav Bhembre, Anthony D'Atri, Karan Singh
3.7 (3)
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Learning Ceph

Learning Ceph

3.7 (3)
By: Vaibhav Bhembre, Anthony D'Atri, Karan Singh
Buy this Book

Overview of this book

Learning Ceph, Second Edition will give you all the skills you need to plan, deploy, and effectively manage your Ceph cluster. You will begin with the first module, where you will be introduced to Ceph use cases, its architecture, and core projects. In the next module, you will learn to set up a test cluster, using Ceph clusters and hardware selection. After you have learned to use Ceph clusters, the next module will teach you how to monitor cluster health, improve performance, and troubleshoot any issues that arise. In the last module, you will learn to integrate Ceph with other tools such as OpenStack, Glance, Manila, Swift, and Cinder. By the end of the book you will have learned to use Ceph effectively for your data storage requirements.
Table of Contents (12 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
Introducing Ceph Storage
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Introducing Ceph Storage
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The history and evolution of Ceph
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New since the first edition
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The future of storage
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Ceph compared to other storage solutions
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Summary
2
Ceph Components and Services
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Ceph Components and Services
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Introduction
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Core components
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Core services
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Summary
3
Hardware and Network Selection
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Hardware and Network Selection
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Introduction
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Hardware selection criteria
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Memory
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Storage drives
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Controllers
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Processors
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Summary
4
Planning Your Deployment
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Planning Your Deployment
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Layout decisions
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Architectural decisions
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Operating system decisions
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Networking decisions
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Summary
5
Deploying a Virtual Sandbox Cluster
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Deploying a Virtual Sandbox Cluster
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Installing prerequisites for our Sandbox environment
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Bootstrapping our Ceph cluster
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Deploying our Ceph cluster
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Scaling our Ceph cluster
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Summary
6
Operations and Maintenance
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Operations and Maintenance
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Topology
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Configuration
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Scrubs
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Logs
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Common tasks
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Working with remote hands
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Summary
7
Monitoring Ceph
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Monitoring Ceph
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Monitoring Ceph clusters
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Monitoring Ceph MONs
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Monitoring Ceph OSDs
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Monitoring Ceph placement groups
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Monitoring Ceph MDS
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Open source dashboards and tools
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Summary
8
Ceph Architecture: Under the Hood
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Ceph Architecture: Under the Hood
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Objects
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Placement groups
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Setting PGs on pools
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CRUSH
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Ceph pools
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Summary
9
Storage Provisioning with Ceph
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Storage Provisioning with Ceph
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Client Services
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Ceph Block Device (RADOS Block Device)
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The Ceph Filesystem (CephFS)
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Ceph Object Storage (RADOS Gateway)
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Summary
10
Integrating Ceph with OpenStack
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Integrating Ceph with OpenStack
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Introduction to OpenStack
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The Best Choice for OpenStack storage
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Virtual OpenStack Deployment
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Summary
11
Performance and Stability Tuning
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Performance and Stability Tuning
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Ceph performance overview
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Kernel settings
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Network settings
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Ceph settings
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Client settings
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Benchmarking
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Summary

Client settings

Ceph's RBD block service is heavily utilized by cloud platforms like OpenStack and other virtualization solutions. Effective caching in memory on the client side can significantly improve the performance that users experience:

[client.yourclientname]
rbd_cache = true
rbd_cache_size = 67108864
rbd_cache_max_dirty = 50331648
rbd_cache_target_dirty = 33554432

These values of 64MB, 48MB, and 32MB are double the default numerical values as of Luminous.

Note

Settings must be selected so thatrbd_cache_size > rbd_cache_max_dirty > rbd_cache_target_dirty.

Some references suggest larger values, but consider that these cache buffers are allocated per attached volume. Consider a dense hypervisor node hosting 100 smaller VM instances, each mapping an RBD volume for its boot drive. With these values, the hypervisor node will dedicate more than 6 GB of RAM just for caching guest boot drives. You may be able to spare that much, but hypervisors are often limited by RAM, and this should be...

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Learning Ceph
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