FOG: A Fast Out-of-Core Graph Processing Framework

In this paper we present FOG, an open source graph processing framework designed for out-of-core (external memory) graph processing (https://github.com/mrshawcode/fog). FOG provides a set of programming interfaces that break down update functions of vertices to their incident edges so as to process the functions with edge-centric manner. By these, FOG gives intuitive and productive programming interfaces, and achieves high main memory utilization rate and processing efficiency at the same time. Moreover, FOG proposes an in-place update shuffling mechanism to improve the performance by dramatically reducing disk I/Os during computing. By extensive evaluations on typical graph algorithms and large real-world graphs, we show that FOG outperforms existing out-of-core graph processing systems, including GraphChi, X-Stream and TurboGraph. By comparing the performances of FOG and those of state-of-art distributed graph processing frameworks, we show that only by using just a commodity PC, FOG achieves comparable or even better performance than the best distributed graph processing framework that uses an Amazon EC2 cluster with 128 nodes.