We’re pushing beyond the inherent limitations of SSD-based AFA architecures – to a place of global flash management from DirectFlash-enabled software. In finally unlocking the true power of flash, you'll get 50% better latency, 5x greater density, and 15-30% more usable capacity from the same flash media.
The capacities of modern SSDs have been increasing at a dramatic rate; however, the per-drive performance of those SSDs has remained basically constant. The end result is a crisis of performance density where the IOPs/Gb of todays newest, biggest SSDs is approximately equivalent to that of disk. So much for all-flash performance and consolidation. And the problem is not just getting worse, it's accelerating.
DirectFlash does away with all the performance-impacting disk-era interfaces and protocols associated with conventional SSDs that until now have presented a “black box” to AFAs. No more Flash Translation Layer, no more SSD garbage collection or write caching – and no more disk-era serial bottleneck from SAS.
Purity DirectFlash Software provides global flash management directly via 100% NVMe/PCIe. Flash allocation and I/O scheduling, as well as NAND cell-level QoS, garbage collection, bad block management, and wear leveling – everything controlled by Purity DirectFlash, and nothing left to the chance behavior of conventional SSDs.
DirectFlash delivers microsecond latency – and that latency is far more predictable than with a conventional SSD. Your application performance is faster than ever and far more consistent, and you can consolidate more workloads. That’s because global I/O scheduling and garbage collection are precise and optimized, informed by full visibility of outstanding I/Os for each flash die, and communication with flash media is via 100% PCIe/NVMe.
DirectFlash enables Purity to access 100% of your flash capacity, eliminating the over-provisioning inside an SSD. Together with global flash allocation and garbage collection, and with virtually no write amplification, DirectFlash wastes nothing – so you get more usable capacity from the same raw flash.
The benefits of DirectFlash extend beyond performance and efficiency: higher throughput makes possible our high-capacity 18 TB flash modules. Imagine, the full power of a Tier 1 array with just 10 flash modules.
Ultimately, DirectFlash is about simpler hardware and fewer layers of software. There’s just less available to fail. And with virtually no write amplification, we minimize flash wear and extend the life of the raw flash. Our arrays already deliver proven 99.9999% availability, and DirectFlash makes them even more reliable.
DirectFlash is the future-proofing for advances in silicon. Through direct management of storage media, with all disk-era bottlenecks eliminated, DirectFlash exploits the full potential of flash – or whatever media comes next.