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• W3173669904 abstract "Rapid growth in scientific data and a widening gap between computational speed and I/O bandwidth make it increasingly infeasible to store and share all data produced by scientific simulations. Instead, we need methods for reducing data volumes: ideally, methods that can scale data volumes adaptively so as to enable negotiation of performance and fidelity tradeoffs in different situations. Multigrid-based hierarchical data representations hold promise as a solution to this problem, allowing for flexible conversion between different fidelities so that, for example, data can be created at high fidelity and then transferred or stored at lower fidelity via logically simple and mathematically sound operations. However, the effective use of such representations has been hindered until now by the relatively high costs of creating, accessing, reducing, and otherwise operating on such representations. We describe here highly optimized data refactoring kernels for GPU accelerators that enable efficient creation and manipulation of data in multigrid-based hierarchical forms. We demonstrate that our optimized design can achieve up to 250 TB/s aggregated data refactoring throughput-83% of theoretical peak-on 1024 nodes of the Summit supercomputer. We showcase our optimized design by applying it to a large-scale scientific visualization workflow and the MGARD lossy compression software." @default.
• W3173669904 created "2021-07-05" @default.
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• W3173669904 date "2021-05-01" @default.
• W3173669904 modified "2023-10-16" @default.
• W3173669904 title "Accelerating Multigrid-based Hierarchical Scientific Data Refactoring on GPUs" @default.
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• W3173669904 doi "https://doi.org/10.1109/ipdps49936.2021.00095" @default.
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