cloud-fan commented on a change in pull request #26611: [SPARK-29939][CORE] Add
a conf for CompressionCodec for Ser/Deser of MapOutputStatus
URL: https://github.com/apache/spark/pull/26611#discussion_r348915101
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File path: core/src/main/scala/org/apache/spark/internal/config/package.scala
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@@ -1016,6 +1016,15 @@ package object config {
.booleanConf
.createWithDefault(true)
+ private[spark] val MAP_STATUS_COMPRESSION_CODEC =
+ ConfigBuilder("spark.shuffle.mapStatus.compression.codec")
+ .doc("The codec used to compress MapStatus, which is generated by
ShuffleMapTask. " +
+ "By default, Spark provides four codecs: lz4, lzf, snappy, and zstd.
You can also " +
+ "use fully qualified class names to specify the codec. If this is not
given, " +
+ "spark.io.compression.codec will be used.")
Review comment:
we can remove this sentence if we don't fallback to
spark.io.compression.codec
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