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• W2338969416 abstract "Genome analysis helps to reveal the genomic variants that cause diseases and evolution of species. Unfortunately, high throughput DNA sequencing (HTS) technologies generate excessive number of small DNA segments -called short reads- that incur significant computational burden. To analyze the entire genome, each of the billions of short reads must be mapped to a reference genome through a computationally expensive process. Due to sequencing errors and genomic variants, the similarity measurement between a read and locations in the reference genome, called alignment, is formulated as an approximate string-matching problem, which is solved using quadratic-time dynamic programming algorithms. In practice, the majority of candidate locations do not align with a given read due to high dissimilarity. The verification process of such candidate locations occupies most of a modern read mapper's execution time. We propose GateKeeper, a new architecture that functions as a pre-alignment step that quickly filters out most incorrect candidate locations. The main idea of GateKeeper is to filter out the incorrect mappings in a streaming fashion using Field-Programmable Gate Arrays (FPGAs). By excluding the incorrect mappings at an early stage, we reduce the number of candidate verifications in the rest of the execution, and thus accelerate the read mapping. GateKeeper is the first design to accelerate pre-alignment using new hardware technologies. On a single FPGA chip, it provides up to 17.3-fold speedup over the state-of-the-art pre-alignment technique, SHD. GateKeeper can provide more than two orders of magnitude speedup over other hardware-accelerated mapping tools such as BWA and BFAST." @default.
• W2338969416 created "2016-06-24" @default.
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• W2338969416 date "2016-04-06" @default.
• W2338969416 modified "2023-09-27" @default.
• W2338969416 title "GateKeeper: Enabling Fast Pre-Alignment in DNA Short Read Mapping with a New Streaming Accelerator Architecture." @default.
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