Ngone51 commented on a change in pull request #28911:
URL: https://github.com/apache/spark/pull/28911#discussion_r458103470
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File path: core/src/main/scala/org/apache/spark/internal/config/package.scala
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@@ -1391,10 +1391,12 @@ 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 `${SHUFFLE_USE_OLD_FETCH_PROTOCOL.key}` is
disabled and 1) external " +
+ s"shuffle `${SHUFFLE_SERVICE_ENABLED.key}` is enabled or 2)
${DYN_ALLOCATION_ENABLED.key}" +
+ s" is disabled), shuffle blocks requested from those block managers
which are running on " +
Review comment:
I mean, it *can* work with this feature enabled(please see my P.S.
comment above). And I will update the document about dynamic allocation to:
1. not allow when `spark.dynamicAllocation.enabled=true` &&
`spark.dynamicAllocation.shuffleTracking.enabled=false`
2. allow when `spark.dynamicAllocation.enabled=true` &&
`spark.dynamicAllocation.shuffleTracking.enabled=true`
also cc @attilapiros Does it make sense to you?
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