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Comparing Workflow Application Designs for High Resolution Satellite Image Analysis

10/27/2020
by   Aymen Al Saadi, et al.
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Very High Resolution satellite and aerial imagery are used to monitor and conduct large scale surveys of ecological systems. Convolutional Neural Networks have successfully been employed to analyze such imagery to detect large animals and salient features. As the datasets increase in volume and number of images, utilizing High Performance Computing resources becomes necessary. In this paper, we investigate three task-parallel, data-driven workflow designs to support imagery analysis pipelines with heterogeneous tasks on HPC. We analyze the capabilities of each design when processing datasets from two use cases for a total of 4,672 satellite and aerial images, and 8.35 TB of data. We experimentally model the execution time of the tasks of the image processing pipelines. We perform experiments to characterize the resource utilization, total time to completion, and overheads of each design. Based on the model, overhead and utilization analysis, we show which design is best suited to scientific pipelines with similar characteristics.

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