Papers › GraphBolt: Dependency-Driven Synchronous Processing of Streaming Graphs
GraphBolt: Dependency-Driven Synchronous Processing of Streaming Graphs
Mugilan Mariappan, Keval Vora
Efficient streaming graph processing systems leverage incremental processing by updating computed results to reflect the change in graph structure for the latest graph snapshot. Although certain monotonic path-based algorithms produce correct results by refining intermediate values via numerical comparisons, directly reusing values that were computed before mutation does not work correctly for algorithms that require BSP semantics. Since structural mutations in streaming graphs render the intermediate results unusable, exploiting incremental computation while simultaneously providing synchronous processing guarantees is challenging. In this paper we develop GraphBolt which incrementally processes streaming graphs while guaranteeing BSP semantics. GraphBolt incorporates dependency-driven incremental processing where it first tracks dependencies to capture how intermediate values get computed, and then uses this information to incrementally propagate the impact of change across intermediate values. To support wide variety of graph-based analytics, GraphBolt provides a generalized incremental programming model that enables development of incremental versions of complex aggregations. Our evaluation shows that GraphBolt's incremental processing eliminates redundant computations and efficiently processes streaming graphs with varying mutation rates, starting from just a single edge mutation all the way up to 1 million edge mutations at a time. Furthermore, being specialized for graph computations, GraphBolt extracts high performance compared to Differential Dataflow.
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