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_r308972677
##########
File path:
core/src/main/scala/org/apache/spark/shuffle/ShuffleBlockResolver.scala
##########
@@ -31,10 +31,14 @@ trait ShuffleBlockResolver {
type ShuffleId = Int
/**
- * Retrieve the data for the specified block. If the data for that block is
not available,
- * throws an unspecified exception.
+ * Retrieve the data for the specified block.
+ *
+ * When the dirs param is None then the disk manager's local directories are
used and this way
+ * local blocks are read otherwise via the specified directories host-local
blocks can be read.
Review comment:
Thanks!
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