以实际算法为例评估MapReduce在石油勘探中的应用

石油勘探领域需要处理海量的地震数据，以获取地下构造用以发现和定位油藏。为评估云计算编程模型MapReduce对于石油勘探领域应用算法的适用性，设计并实现了基于MapReduce的三维Fresnel层析成像算法，实验发现MapReduce版本的性能比MPI版本慢3倍，而且对MapReduce作业调优的难度相当大。为了拓展MapReduce在石油勘探领域高性能计算领域的应用，需要在支持线程级并行、灵活性和提升I/O可扩展性3个方面进行改进，并提出了研究方法和技术路线。

Evaluating MapReduce for seismic data processing using a practical application

Huge amounts of seismic data undergo complex iterative processing in the oil industry to get knowledge of the earth’s subsurface structure to detect where oil can be found and recovered.To evaluate the suitability of MapReduce for seismic processing algorithms,the algorithm design and implementation of Fresnel tomography on Hadoop MapReduce was described.Experiments demonstrate that MapReduce is approximately 3 times slower than MPI,and tuning the performance of MapReduce is really hard.To expand its applicability to high performance computing for oil industry,MapReduce should be improved in the flexibility and provide the opportunity to exploit fine-grained thread-level parallelism.Finally,research ideas to achieve these objectives were presented.