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Emerging non-volatile memory technologies (NVRAM) offer alternatives to harddrives that are persistent, while providing similar latencies to DRAM. Intelrecently released the Optane drive, which features 3D XPoint memory technology.This device can be deployed as an SSD or as persistent memory. In this paper,we provide a performance comparison between Optane (SSD DC4800X) and NVMe (SSDDC3700) drives as block devices. We study the performance from twoperspectives: 1) Benchmarking of drives using FIO workloads, and 2) Assessingthe impact of using Optane over NVMe within the DataSpaces framework forin-memory data staging to support in-situ scientific workflows.

Using Intel Optane Devices for In-situ Data Staging in HPC Workflows