If you’re considering deploying an SDS solution and looking for simplicity, flexibility, and savings, ESG Lab suggests considering OSNEXUS.
— Enterprise Strategy Group

QuantaStor is a unified Software Defined Storage (SDS) platform designed to scale up and out to make storage management easy while reducing overall enterprise storage costs. QuantaStor SDS, deployed in datacenters worldwide, addresses a broad set of storage use cases including server virtualization, big data, cloud computing, and high performance applications through scale-out physical and virtual storage appliances. With support for all major SAN/NAS protocols including iSCSI/FC and NFS/CIFS/SMB and a high availability scale up and out file system with fault-tolerant technologies, QuantaStor SDS delivers a complete array of enterprise features and capabilities for file, block and object storage that can be installed on any 64-bit Intel or AMD server or virtual machine.

Scale-up, Scale-out Grid Technology
QuantaStor’s grid technology enables the scaling of storage up and out to 64 physical or virtual storage appliances locally or dispersed across geographies. Easily provision storage from any appliance in the grid from a single web-based management interface with no special client side software to install.

Flexible, Modular Architecture
The layered architecture of QuantaStor SDS provides solution engineers with unprecedented flexibility and application design options that maximizes workload performance and fault-tolerance for a wide range of storage workloads. 

Simplified Management
The intuitive QuantaStor SDS management interface eliminates many complicated steps commonly associated with legacy storage applications while providing IT generalists that delivers powerful storage solution configuration options. QuantaStor's web-based interface requires no special client-side software to install.

Further Reading:
ESG Lab First Look: Simplified Scale-out SDS for Block, File, and Object
QuantaStor SDS v4 Overview