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• W2045585624 abstract "Hierarchical, multiresolution data representations enable interactive analysis and visualization of large-scale simulations. One promising application of these techniques is to store high performance computing simulation output in a hierarchical Z (HZ) ordering that translates data from a Cartesian coordinate scheme to a one-dimensional array ordered by locality at different resolution levels. However, when the dimensions of the simulation data are not an even power of 2, parallel HZ ordering produces sparse memory and network access patterns that inhibit I/O performance. This work presents a new technique for parallel HZ ordering of simulation datasets that restructures simulation data into large (power of 2) blocks to facilitate efficient I/O aggregation. We perform both weak and strong scaling experiments using the S3D combustion application on both Cray-XE6 (65,536 cores) and IBM Blue Gene/P (131,072 cores) platforms. We demonstrate that data can be written in hierarchical, multiresolution format with performance competitive to that of native data-ordering methods." @default.
• W2045585624 created "2016-06-24" @default.
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• W2045585624 date "2012-11-10" @default.
• W2045585624 modified "2023-09-26" @default.
• W2045585624 title "Efficient data restructuring and aggregation for I/O acceleration in PIDX" @default.
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• W2045585624 doi "https://doi.org/10.5555/2388996.2389064" @default.
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