Realtime index-free single source simrank processing on web-scale graphs

Jieming Shi, Tianyuan Jin, Renchi Yang, Xiaokui Xiao, Yin Yang

Research output: Contribution to journalConference articlepeer-review

10 Citations (Scopus)


Given a graph G and a node υ ∈ G, a single source Sim- Rank query evaluates the similarity between u and every node υ ∈ G. Existing approaches to single source SimRank computation incur either long query response time, or expensive pre-computation, which needs to be performed again whenever the graph G changes. Consequently, to our knowledge none of them is ideal for scenarios in which (i) query processing must be done in realtime, and (ii) the underlying graph G is massive, with frequent updates. Motivated by this, we propose SimPush, a novel algorithm that answers single source SimRank queries without any precomputation, and achieves significantly higher query speed than even the fastest known index-based solutions. Further, SimPush provides rigorous result quality guarantees, and its high performance does not rely on any strong assumption of the graph. Specifically, compared to existing methods, SimPush employs a radically different algorithmic design that focuses on (i) identifying a small number of nodes relevant to the query, and subsequently (ii) computing statistics and performing residue push from these nodes only. We prove the correctness of SimPush, analyze its time complexity, and compare its asymptotic performance with that of existing methods. Meanwhile, we evaluate the practical performance of SimPush through extensive experiments on 9 real datasets. The results demonstrate that SimPush consistently outperforms all existing solutions, often by over an order of magnitude. In particular, on a commodity machine, SimPush answers a single source SimRank query on a web graph containing over 133 million nodes and 5.4 billion edges in under 62 milliseconds, with 0.00035 empirical error, while the fastest index-based competitor needs 1.18 seconds.

Original languageEnglish
Pages (from-to)966-978
Number of pages13
JournalProceedings of the VLDB Endowment
Issue number7
Publication statusPublished - Mar 2020
Event46th International Conference on Very Large Data Bases, VLDB 2020 - Virtual, Japan
Duration: 31 Aug 20204 Sept 2020

Scopus Subject Areas

  • Computer Science (miscellaneous)
  • Computer Science(all)


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