GitHub user maropu opened a pull request:
https://github.com/apache/spark/pull/4138
[SPARK-5352][GraphX] Add getPartitionStrategy in Graph
Graph remembers an applied partition strategy in partitionBy() 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)
// Modify (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.getPartitionStrategy, 2)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/maropu/spark PartitionStrategyInGraph
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/4138.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #4138
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commit 9fd03a64af3ab1160461b94aa7552b897d58059a
Author: Takeshi Yamamuro <[email protected]>
Date: 2015-01-21T16:49:37Z
Add getPartitionStrategy in Graph
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