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Ceph Cookbook - Second Edition by Karan Singh, Michael Hackett, Vikhyat Umrao

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Scaling down your Ceph cluster

One of the most important features of a storage system is its flexibility. A good storage solution should be flexible enough to support its expansion and reduction without causing any downtime to the services. Traditional storage systems have limited flexibility; the expansion and reduction of such systems is a tough job. Sometimes, you feel locked with storage capacity and that you cannot perform changes as per your needs.

Ceph is an absolutely flexible storage system that supports on-the-fly changes to storage capacity, whether expansion or reduction. In the last recipe, we learned how easy it is to scale out a Ceph cluster. In this recipe, we will scale down a Ceph cluster, without any impact on data accessibility, ...

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