The content store selector provides a mechanism to control the physical location on disk for a content file associated with a particular content node. This allows storage polices to be implemented to control which underlying physical storage is used, based on your applications needs or business policies.
For example, it is possible to use a very fast tier-1 Solid State Drive (SSD) for our most important content files. Then, based on business policies that have been decided, gradually move the data, as it becomes less important, to cheaper tier-2 drives such as Fiber Channel (FC) drives or Serial ATA drives. In this way, it is possible to manage the storage of content more cost effectively: