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• W2885240937 abstract "Spurred by a widening gap between hardware accelerators and traditional processors, numerous bioinformatics applications have harnessed the computing power of GPUs and reported substantial performance improvements compared to their CPU-based counterparts. However, most of these GPU-based applications only focus on the read alignment problem, while the field of de novo assembly still relies mostly on CPU-based solutions. This is primarily due to the nature of the assembly workload which is not only compute-intensive but also extremely data-intensive. Such workloads require large memories, making it difficult to adapt them to use GPUs with their limited memory capacities. To the best of our knowledge, no GPU-based assembler reported in the recent literature has attempted to assemble datasets larger than a few tens of gigabytes, whereas real sequence datasets are often several hundreds of gigabytes in size. In this paper, we present a new GPU-accelerated genome assembler called LaSAGNA, which can assemble large-scale sequence datasets using a single GPU by building string graphs from approximate all-pair overlaps. LaSAGNA can also run on multiple GPUs across multiple compute nodes connected by a high-speed network to expedite the assembly process. To utilize the limited memory on GPUs efficiently, LaSAGNA uses a semi-streaming approach that makes at most a logarithmic number of passes over the input data based on the available memory. Moreover, we propose a two-level streaming model, from disk to host memory and from host memory to device memory, to minimize disk I/O. Using LaSAGNA, we can assemble a 400 GB human genome dataset on a single NVIDIA K40 GPU in 17 hours, and in a little over 5 hours on an 8-node cluster of NVIDIA K20s." @default.
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• W2885240937 date "2018-05-01" @default.
• W2885240937 modified "2023-09-26" @default.
• W2885240937 title "GPU-Accelerated Large-Scale Genome Assembly" @default.
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• W2885240937 doi "https://doi.org/10.1109/ipdps.2018.00091" @default.
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