Ray Tracing in the Cloud using MapReduce

Lesley Northam, Khuzaima Daudjee, Rob Smits, Joe Istead
University of Waterloo
University of Waterloo, 2013


   title={Ray Tracing in the Cloud using MapReduce},

   author={Northam, Lesley and Daudjee, Khuzaima and Smits, Rob and Istead, Joe},



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We present the Hadoop Online Ray Tracer (HORT), a scalable ray tracing framework for general, pay-as-you-go, cloud computing services. Using MapReduce, HORT partitions the computational workload and scene data differently than other distributed memory ray tracing frameworks. We show that this unique partitioning significantly bounds the data replication costs and inter-process communication. Consequently HORT is fault-tolerant and cost-effective when rendering large-scale scenes (i.e., scenes that do not fit into local memory) without specific or dedicated high performance infrastructure. Our experiments demonstrate this scalability and fault tolerance using several CPU and GPU instances on Amazon AWS with the Hadoop open-source implementation of MapReduce.
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