Storage system vendors have chosen to integrate flash in two ways: incorporate standard off-the-shelf SSDs, or design their own flash modules and controllers. Many of the early all-flash array pioneers, like Violin and TMS, designed their own custom flash modules for what were very sound reasons at the time. The choice to go in one direction or another in this area revolves around several criteria, most notably Performance, Time-to-Market, and Cost. I explore all 3 as it relates to this subject below:
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Several new storage systems have come to market with the goal of delivering shared flash resources as a service to high-scale, distributed applications.
These products take advantage of some of the following technology developments in the storage and networking space: Standards-based PCIe-Connected SSDs, RDMA-Capable Ethernet Networking up to 100 Gbe, a standard storage srotocol designed for PCIe-Connected SSDs (NVMe), as well as a standardp protocol for remotely Accessing NVMe devices (NVMe-Over-Fabrics, or NVMeOF). Note that Red Hat 7.4 and Ubuntu 16 both now include NVMeOF support inbox.