Not all scale-out solutions are created equal. There are 2 approaches to scale-out—those that maintain hard mapping of data to LUNS, volumes and nodes, and those that automate data layout and management and are virtualized. 

When choosing a scale-out storage system, it is critical to understanding which approach a vendor has taken, and how their approaches can affect things like overall management overhead, utilization, provisioning time, and ease-of-use.

Check out this comprehensive white paper to evaluate the trade-offs accordingly and choose which system is most conducive to your organization.