To understand what an Hyper Converged Infrastructure is, it may be useful to focus on a single aspect of IT resources, storage. Traditionally, IT resources are procured in two distinct ways: traditional servers, usually with their internal disk resources, and external dedicated units, that aggregate storage for many users in the form of a Storage Area Network, or SAN. 
Both models present important disadvantages: physical servers are not easily expandable, and if something catastrophic happens there is usually no alternative than procure another unit and reinstall everything. SANs, on the other hand, usually allow for some limited expandability, but have a much higher cost per Gigabyte of stored data, and are limited both by the number of their disks and the network connectivity.

What if we can bring together the data and the application that use it? That’s what HCI is - bringing in an optimal way together data, CPU and networking in a single box that can grow as much as needed, one node at a time.

Hyperconverged infrastructure brings all pieces together in building-block style. Need more space? Add a new node. A disk failure? The system will transparently replace the unavailable resources for you, without requiring administrative intervention. And forget about poor performance, as the system moves your data near the virtual machine that needs it.

NodeWeaver brings the most sophisticated open platform for virtualization, together with a novel Distributed File System designed to withstand the most dramatic disasters, a networking layer powered by the OpenVSwitch distributed network and an autonomic engine that handles most of the task transparently without the need for user intervention. It’s converged infrastructure, plus intelligence.