Takeshi Yamamuro created SPARK-5352:
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Summary: Add getPartitionStrategy in Graph
Key: SPARK-5352
URL: https://issues.apache.org/jira/browse/SPARK-5352
Project: Spark
Issue Type: Improvement
Components: GraphX
Reporter: Takeshi Yamamuro
Priority: Minor
Graph remembers an applied partition strategy in paritionBy() and
returns it via getPartitionStrategy().
This is useful in case of the following situation;
val g1 = GraphLoader.edgeListFile(sc, "graph.txt")
val g2 = g1.partitionBy(EdgePartition2D, 2)
// Modifiy (e.g., add, contract, ...) edges in g2
val newEdges = ...
// Re-build a new graph based on g2
val g3 = Graph(g1.vertices, newEdges)
// Partition edges in a similar way of g2
val g4 = g3.partitionBy(g2.getParitionStrategy, 2)
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