Will HPC Centers Say ADIOS To POSIX I/O?
The Next Platform, September 5th, 2019
The widening performance disparity between compute and I/O is not likely to get any better in the fast-approaching exascale era

"In fact, even though hardware advances in areas like storage-class memory, NVM-Express, and other flash-based componentry can accelerate the flow of data between the processor and storage, compute will continue to outpace I/O for the foreseeable future.

That leaves much of the heavy lifting to be done on the software side. And certainly there has been plenty of activity here, especially in areas like NVMe-over-Fabrics and burst buffers, as well as more specific solutions like DAOS. To one extent or another, all of these assume there is some underlying solid state storage or memory to speed things along..."

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