Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18174#discussion_r125468331
--- Diff:
core/src/main/scala/org/apache/spark/internal/config/package.scala ---
@@ -335,4 +335,26 @@ package object config {
"spark.")
.booleanConf
.createWithDefault(false)
+
+ private[spark] val SHUFFLE_FILE_BUFFER_SIZE =
+ ConfigBuilder("spark.shuffle.file.buffer")
+ .doc("Used to set the buffer size of outputstream in shuffle
writer.")
+ .bytesConf(ByteUnit.KiB)
+ .checkValues(Set(4, 8, 16, 32, 64, 128, 256, 512, 1024))
--- End diff --
we should use `checkValue(v => v >= 0 && v <= Int.MaxValue / 1024, ...)`
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