A Budget-Based Algorithm for Efficient Subgraph Matching on Huge Networks

In: Conference| Publication

16 Apr 2011

Workshop Paper, ICDE Workshop on Graph Data Management, 2011, Hannover, Germany
Authors: Matthias Broecheler, Andrea Pugliese, VS Subrahmanian
Direct link to paper

Abstract
As social network and RDF data grow dramatically in size to billions of edges, the ability to scalably answer queries posed over graph datasets becomes increasingly important.
In this paper, we consider subgraph matching queries which are often posed to social networks and RDF databases - for such queries, we want to find all matching instances in a graph database. Past work on subgraph matching queries uses static cost models which can be very inaccurate due to long-tailed degree distributions commonly found in real world networks. We propose the BudgetMatch query answering algorithm. BudgetMatch costs and recosts query parts adaptively as it executes and learns more about the search space. We show that using this strategy, BudgetMatch can quickly answer complex subgraph queries on very large graph data. Specifically, on a real world social media data set consisting of 1.12 billion edges, we can answer complex subgraph queries in under one second and significantly outperform existing subgraph matching algorithms.

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