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| -rw-r--r-- | graphx/src/main/scala/org/apache/spark/graphx/GraphLab.scala | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/graphx/src/main/scala/org/apache/spark/graphx/GraphLab.scala b/graphx/src/main/scala/org/apache/spark/graphx/GraphLab.scala index 016bab5d02..2f828ad807 100644 --- a/graphx/src/main/scala/org/apache/spark/graphx/GraphLab.scala +++ b/graphx/src/main/scala/org/apache/spark/graphx/GraphLab.scala @@ -35,6 +35,12 @@ object GraphLab extends Logging { * @tparam ED the graph edge attribute type * @tparam A the type accumulated during the gather phase * @return the resulting graph after the algorithm converges + * + * @note Unlike [[Pregel]], this implementation of [[GraphLab]] does not unpersist RDDs from + * previous iterations. As a result, long-running iterative GraphLab programs will eventually fill + * the Spark cache. Though Spark will evict RDDs from old iterations eventually, garbage + * collection will take longer than necessary since it must examine the entire cache. This will be + * fixed in a future update. */ def apply[VD: ClassTag, ED: ClassTag, A: ClassTag] (graph: Graph[VD, ED], numIter: Int, |