ForestStream: Accurate Measurement of Cascades in Online Social Networks

Various Online Social Network (OSN) based applications depend on the interactions between users to disseminate information and recruit more users. The temporal evolution of adoption or cascade process of new products, applications or ideas is important to advertisers, OSN operators and application developers. Interactions between users are represented by massive directed graphs, so graph sampling methods were proposed to capture their properties. Existing graph sampling methods, such as a simple random walk, however, are ill- suited for capturing this and other dynamic properties of the graph. We propose ForestStream, a measurement method that relies on a combination of sampling and streaming with the goal of capturing the statistical properties of cascades in OSN graphs. We demonstrate our method's accuracy over existing methods in inferring the cascade statistics, with a low memory usage.