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https://issues.apache.org/jira/browse/SPARK-3427?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ankur Dave updated SPARK-3427:
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Summary: Avoid active vertex tracking in static PageRank (was: Avoid
unnecessary active vertex tracking in static PageRank)
> Avoid active vertex tracking in 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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