Dell Express Flash technology is currently available for purchase on performance 2-socket and 4-socket PowerEdge server platforms, including the R920, R820, R720, R620, T620, M620 and M820.
Solid-state drives (SSDs) use solid-state NAND flash memory to store data rather than the rotating magnetic recording media of hard disk drives (HDDs). Even the latest HDDs are performance-limited by the spindle speed of the disk (15K rpm). Solid-state technology does not suffer from the mechanical constraints of HDDs because it has no moving parts, providing reliable, ultra-fast, low-power and cost-effective storage devices. Nonvolatile NAND flash replace mechanical drives in solid-state storage solutions, designed to provide fast, reliable, low-power and cost-effective storage devices. Two types of non-volatile NAND types flash are in use today:
SAS/SATA SSDs are similar to HDDs in that they use the same interface and therefore are accessed by the system through the same OS driver stack. While SAS/SATA solid-state storage devices offer significantly better performance over standard rotating-media HDDs, their performance can be limited by the latency and bottlenecks inherent in the driver stack. A single Express Flash drive can achieve up to 10.5x more database transactions per second than HDD storage.
PCIe solid-state storage (SSS), on the other hand, is directly connected to the PCIe bus. The bus provides a direct connection between the PCIe-SSS and the CPU, as well as system memory. This tightly coupled connection provides a storage environment that has lower latency than a SAS/SATA SSD.
|Dell PowerEdge Express Flash PCIe-SSD|
The PowerEdge Express Flash PCIe-SSD is a high-performance storage device built with enterprise-class NAND flash designed for solutions requiring low latency, high input/output operations per second (IOPS) and enterprise-class storage reliability and serviceability. The Express Flash PCIe-SSD is a PCIe Gen2/Gen3-compliant device (depending on server type) that can be configured as storage cache or as a primary storage device in demanding enterprise environments, such as enterprise blade and rack servers, video-on-demand servers, web accelerators and virtualization appliances.
Dell also is a founding member of the Non Volatile Memory Express (NVM Express) consortium helping drive a standardized high-performance host controller interface for PCIe SSDs designed for current and next-generation non-volatile memory.
|Drive form factor|
The SSD FF WG is working toward a specification that leverages the current 2.5" HDD form factor standard. The aim is to enable enclosure flexibility while supporting the new connector definition and expanding the power envelope to support higher performance.
On your latest generation PowerEdge™ server enabled for PCIe-SSD, the PowerEdge Express Flash 2.5" PCIe-SSD form factor allows it to be plugged into a device bay. Up to four Express Flash devices can be connected, depending on your server.
Express Flash PCIe-SSDs integrate with servers at the system bus and kernel level, creating a new flash storage cache/tier that can be used as a second-level database buffer cache for frequently read blocks or to store database objects, which requires low latency and high IO rates.
Turn your data into insights with Dell Express Flash PCIe technology. Explore our Reference Architectures to drive faster results for your business application.
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