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Streaming Algorithms for Biological Sequence Alignment on GPUs

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4 Author(s)
Weiguo Liu ; Nanyang Technol. Univ., Singapore ; Bertil Schmidt ; Gerrit Voss ; Wolfgang Muller-Wittig

Sequence alignment is a common and often repeated task in molecular biology. Typical alignment operations consist of finding similarities between a pair of sequences (pairwise sequence alignment) or a family of sequences (multiple sequence alignment). The need for speeding up this treatment comes from the rapid growth rate of biological sequence databases: every year their size increases by a factor of 1.5 to 2. In this paper, we present a new approach to high-performance biological sequence alignment based on commodity PC graphics hardware. Using modern graphics processing units (GPUs) for high-performance computing is facilitated by their enhanced programmability and motivated by their attractive price/performance ratio and incredible growth in speed. To derive an efficient mapping onto this type of architecture, we have reformulated dynamic-programming-based alignment algorithms as streaming algorithms in terms of computer graphics primitives. Our experimental results show that the GPU-based approach allows speedups of more than one order of magnitude with respect to optimized CPU implementations.

Published in:

IEEE Transactions on Parallel and Distributed Systems  (Volume:18 ,  Issue: 9 )