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High performance computing (HPC) applications have a high requirement onstorage speed and capacity. Non-volatile memory is a promising technology toreplace traditional storage devices to improve HPC performance. Earlier in2017, Intel and Micron released first NVM product -- Intel Optane SSDs. Optaneis much faster and more durable than the traditional storage device. It createsa bridge to narrow the performance gap between DRAM and storage. But is theexisting HPC I/O stack still suitable for new NVM devices like Intel Optane?How does HPC I/O workload perform with Intel Optane?  In this paper, we analyze the performance of I/O intensive HPC applicationswith Optane as a block device and try to answer the above questions. We studythe performance from three perspectives: (1) basic read and write bandwidth ofOptane, (2) a performance comparison study between Optane and HDD, includingcheckpoint workload, MPI individual I/O vs. POSIX I/O, and MPI individual I/Ovs. MPI collective I/O, and (3) the impact of Optane on the performance of aparallel file system, PVFS2.

Early Evaluation of Intel Optane Non-Volatile Memory with HPC I/O Workloads