Ankur Dave created SPARK-3427:
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Summary: Standalone version of static PageRank
Key: SPARK-3427
URL: https://issues.apache.org/jira/browse/SPARK-3427
Project: Spark
Issue Type: Improvement
Components: GraphX
Reporter: Ankur Dave
Assignee: Ankur Dave
GraphX's current implementation of static (fixed iteration count) PageRank is
implemented using the Pregel API. This unnecessarily tracks active vertices,
even though in static PageRank all vertices are always active. Active vertex
tracking incurs the following costs:
1. A shuffle per iteration to ship the active sets to the edge partitions.
2. A hash table creation per iteration at each partition to index the active
sets for lookup.
3. A hash lookup per edge to check whether the source vertex is active.
I reimplemented static PageRank using the GraphX API instead of the
higher-level Pregel API. In benchmarks on a 16-node m2.4xlarge cluster, this
provided a 23% speedup (from 514 s to 397 s, mean over 3 trials) for 10
iterations of PageRank on a synthetic graph with 10M vertices and 1.27B edges.
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