attilapiros commented on a change in pull request #25299: [SPARK-27651][Core]
Avoid the network when shuffle blocks are fetched from the same host
URL: https://github.com/apache/spark/pull/25299#discussion_r309178037
##########
File path:
core/src/main/scala/org/apache/spark/storage/BlockManagerMessages.scala
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@@ -97,6 +97,15 @@ private[spark] object BlockManagerMessages {
case class GetLocationsAndStatus(blockId: BlockId, requesterHost: String)
extends ToBlockManagerMaster
+ case class GetLocalDirs(executorIds: Array[String]) extends
ToBlockManagerMaster
+
+ /**
+ * The response message of `GetLocalDirs` request.
+ *
+ * @param localDirs follows the order of the block manager IDs used in the
`GetLocalDirs` request.
Review comment:
I was wrong here: somehow I thought it is better to avoid maps in messages
because of Kryo. But now I see it works perfectly (even with Kryo).
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