holdenk commented on a change in pull request #28911:
URL: https://github.com/apache/spark/pull/28911#discussion_r479699359
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File path: core/src/main/scala/org/apache/spark/internal/config/package.scala
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@@ -1415,10 +1415,11 @@ package object config {
private[spark] val SHUFFLE_HOST_LOCAL_DISK_READING_ENABLED =
ConfigBuilder("spark.shuffle.readHostLocalDisk")
- .doc(s"If enabled (and `${SHUFFLE_USE_OLD_FETCH_PROTOCOL.key}` is
disabled and external " +
- s"shuffle `${SHUFFLE_SERVICE_ENABLED.key}` is enabled), shuffle " +
- "blocks requested from those block managers which are running on the
same host are read " +
- "from the disk directly instead of being fetched as remote blocks over
the network.")
+ .doc(s"If enabled (and `${SHUFFLE_USE_OLD_FETCH_PROTOCOL.key}` is
disabled, shuffle " +
+ "blocks requested from those block managers which are running on the
same host are " +
+ "read from the disk directly instead of being fetched as remote blocks
over the " +
+ "network. Note that for k8s workloads, this only works when nodes are
using " +
+ "non-isolated container storage.")
Review comment:
Good point 👍
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