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PMIO: Optimizing Parallel Collective I/O Accesses through Node-Local Persistent Memory
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DOI：10.1016/j.jpdc.2026.105275.png)
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Abstract
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• We identify the major bottleneck of MPI Collective I/O on supercomputers. • We design PMIO to increase the size of collective I/O buffers leveraging node-local persistent memory. • Our experimental results show that PMIO outperforms ROMIO collective I/Os by up to 151x on supercomputers.
Keywords:
MPI Collective I/O
Persistent Memory
Supercomputers
I/O Optimization
Parallel Computing
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3.8K
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