For a while there was only one vendor selling solid-state storage on a PCIe card, and now there are a bunch of them. What differentiates these solid-state cards, and is caching the best use of server-side flash?
You are right, there are a lot of PCIe flash vendors including Fusion-IO, Micron Technology, LSI, Virident Systems, Violin Memory, sTec, OCZ Technology, SanDisk, IBM/Texas Memory Systems and Smart Modular Technologies.
They all use different techniques to manage the memory -- some use the RAM to manage it, others manage it on the solid-state card. There are lots of different form factors, lots of different price points and different capacities. Just like with a lot of other technologies, there's not usually just one that satisfies every need.
This was first published in September 2013