Unfairness in Distributed Graph Frameworks

In the era of big data, distributed graph processing frameworks have become important in processing large-scale graph datasets. Such distributed frameworks exhibit major advantages with respect to scalability, and provide various ways to speed up sequential graph algorithms. However, the literature lacks an analysis on the fairness properties of such distributed algorithms. In this work, we analyze several important distributed frameworks and graph analysis algorithms with respect to their fairness properties. Across numerous real-world network datasets, we demonstrate that distributed algorithms often exhibit worse fairness performance as compared to their sequential counterparts. Moreover, we observe that this phenomenon is often strongly connected to the homophily of the graph dataset the tendency of nodes to connect to other nodes of the same class.