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Subject [GitHub] [spark] cloud-fan commented on a change in pull request #26611: [SPARK-29939][CORE] Add a conf for CompressionCodec for Ser/Deser of MapOutputStatus
Date Thu, 21 Nov 2019 06:35:21 GMT
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
 
 

 ##########
 File path: core/src/main/scala/org/apache/spark/internal/config/package.scala
 ##########
 @@ -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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