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Mastering Ceph

You're reading from   Mastering Ceph Redefine your storage system

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Product type Paperback
Published in May 2017
Publisher Packt
ISBN-13 9781785888786
Length 240 pages
Edition 1st Edition
Tools
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Author (1):
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Nick Fisk Nick Fisk
Author Profile Icon Nick Fisk
Nick Fisk
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Toc

Table of Contents (12) Chapters Close

Preface 1. Planning for Ceph FREE CHAPTER 2. Deploying Ceph 3. BlueStore 4. Erasure Coding for Better Storage Efficiency 5. Developing with Librados 6. Distributed Computation with Ceph RADOS Classes 7. Monitoring Ceph 8. Tiering with Ceph 9. Tuning Ceph 10. Troubleshooting 11. Disaster Recovery

PG states -the good, the bad, and the ugly

Each placement group in Ceph has one or more statuses assigned to it; normally you want to see all your PGs with active+clean against them. Understanding what each state means can help us identify what is happening to PG and whether you need to take action.

The good

The following states are indication of a healthy operating cluster, no action needs to be taken.

The active state

The active state means that PG is in full health, and it is capable of accepting client requests.

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