vSAN 6.0 introduced the ability to create an all-flash architecture in which flash cache devices and flash capacity devices are intelligently used as a write cache and also provide high endurance data persistence.

This all-flash architecture allows tiering of PCI-e devices—a write-intensive, high endurance performance tier for the writes, and a read-intensive, cost-effective capacity tier for data persistence, thereby reducing the overall cost of an all-flash architecture.

This approach with a vSAN 6.0 all-flash architecture provides consistent, predictable performance, with up to 90K IOPS per host and sub-millisecond response times, making it ideal for Tier 1 or business-critical workloads.