Architectural decisions
In this section we'll explore a number of choices to make regarding how your Ceph cluster's resources are deployed. Some of these may be adjusted after the fact with varying degrees of difficulty, but careful attention to your current and future needs here will save you considerable grief in the future.
Pool decisions
As we'll explore in Chapter 8, Ceph Architecture: Under the Hood, Ceph clusters provision one or more pools in which data is organized, for example, one for block storage and another for object storage. These pools may have different designs based on different use cases; they may even live on different hardware. Several important decisions must be made before provisioning each pool.
Replication
The keeping of redundant copies of data is fundamental to Ceph, and the manner in which this is done is a fundamental characteristic of each pool. One is not prevented from provisioning a pool with no redundancy, but it rarely if ever makes sense to do so. Ceph today...
