Somehow I wrote >7k words in the process of documenting/benchmarking quite a few SSDs (including an Intel Optane P4800X) as SLOG/ZIL & tested some special allocation device performance. Feedback greatly appreciated! :
Intel SSDPE21K375GA OPTANE DC P4800X 375GB U.2 2.5 NVMe PCIe Solid State Drive | eBay
SSDPED1K375GA01, Intel Optane SSD DC P4800X Series (375GB, 1/2 Height PCIe x4, 20nm, 3D XPoint) | EET
Intel Optane SSD DC P4800X Optane Use Cases - ServeTheHome
FS: Intel Optane P4800X Series 375GB, 2.5inch U.2 NVME SSD - FM Forums