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High-Performance I/O: HDF5 for Lattice QCD
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Practitioners of lattice QCD/QFT have been some of the primary pioneer users of the state-of-the-art high-performance-computing systems, and contribute towards the stress tests of such new machines as soon as they become available. As with all aspects of high-performance-computing, I/O is becoming an increasingly specialized component of these systems. In order to take advantage of the latest available high-performance I/O infrastructure, to ensure reliability and backwards compatibility of data files, and to help unify the data structures used in lattice codes, we have incorporated parallel HDF5 I/O into the SciDAC supported USQCD software stack. Here we present the design and implementation of this I/O framework. Our HDF5 implementation outperforms optimized QIO at the 10-20% level and leaves room for further improvement by utilizing appropriate dataset chunking.
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Cited by 1 Pith paper
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Anisotropic Flow in Ultra-Central Pb$-$Pb Collisions at $\sqrt{\mathrm{s_{NN}}}=5.36$ TeV with ALICE
New ALICE Run 3 data show v3{2}/v2{2} exceeding Trajectum model predictions in ultra-central Pb-Pb collisions, confirming the ultra-central flow puzzle at 5.36 TeV.
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