Print Email Facebook Twitter Implementing the Reordered PageRank Algorithm in Giraph Title Implementing the Reordered PageRank Algorithm in Giraph Author Oostenbrink, J. Contributor Van Gijzen, M.B. (mentor) De Weerdt, M.M. (mentor) Faculty Electrical Engineering, Mathematics and Computer Science Department Applied mathematics Date 2015-07-03 Abstract PageRank, a method to rank web pages objectively and mechanically, models a random web surfer. The PageRank problem is most easily solved iteratively, using the power method. In this paper the reordered PageRank algorithms are discussed. These algorithms (proposed by A. N. Langville and C. D. Meyer in "A reordering for the PageRank problem") see the PageRank problem as a linear system of equations and begin by reordering the input Graph/matrix. This way only a smaller problem has to be solved. A disadvantage is that it does take a few extra steps to gain the PageRank values from the solution to this smaller problem. We've developed a suitable stopping condition for these algorithms. However, numerical experiments indicate that this stopping condition is much stricter than the stopping condition for the power method. The reordered PageRank algorithms and the power method have been implemented in Giraph, an open source version of Pregel. Pregel and Giraph are frameworks for solving large graph problems distributively in a vertex centred manner. Because of some of the bugs and features in Giraph (and the inherent complexity of the reordered PageRank algorithms), implementing the reordered PageRank algorithms is much more complicated than implementing the power method. The reordered PageRank algorithms are not faster than the power method in Giraph. Even when accounting for the difference in stopping condition the power method is much faster than the reordered PageRank algorithms. Subject PageRankReorderingPower MethodPower IterationGiraph To reference this document use: http://resolver.tudelft.nl/uuid:a41607f7-6a0c-4a0a-8895-5aa963c86d6f Part of collection Student theses Document type bachelor thesis Rights (c) 2015 Oostenbrink, J. Files PDF Reordered_PageRank_Algori ... Giraph.pdf 523.59 KB Close viewer /islandora/object/uuid:a41607f7-6a0c-4a0a-8895-5aa963c86d6f/datastream/OBJ/view