In general, I lean to EMC Unity due to its flexibility, modularity and low cost. I would use NetApp if I already had this in my portfolio and you heavily used key features like file support.

The question is not “Nutanix or vSAN” it is what are my workload requirements and Virtualization model? If I am a HyperV shop or non-VMWare Hypervisor – I am drawn to Nutanix by its generic hypervisor support even as I am worried about licensing. If I am a VMWare shop…

The real comparison needs to be made between Nutanix and EMC/Dell's VX-Rail. This is a much closer than the EVO:Rail go to market concept.

Have only used ScaleIO not Storpool - no basis for comparison. My perspective on all the pure play SW products is to wait one more server cycle for NVRam, products like the new Samsung 1 million IOPS SSD for io caching and commoditization of high capacity SSDs (4+ TB)…