EMC ScaleIO: software-only server-based storage area network (SAN) that converges storage and compute resources to form a single-layer, enterprise-grade storage product. ScaleIO storage is elastic and delivers linearly scalable performance. Its scale-out server SAN architecture can grow from a few to thousands of servers.
ScaleIO uses servers' direct-attached storage (DAS) and aggregates all disks into global, shared, block storage. ScaleIO features single-layer compute and storage architecture without requiring additional hardware or cooling/power/space.
Expand or shrink capacity or performance simply, easily, and non-disruptively on demand, without capacity planning or data migration. Grow in small or large increments and pay as you grow, running on any server and with any storage media.