update doc and test

Davies Liu · Davies Liu · commit f49f1ef92eae · 2015-12-16T20:48:36.000-08:00
diff --git a/core/src/test/scala/org/apache/spark/io/CompressionCodecSuite.scala b/core/src/test/scala/org/apache/spark/io/CompressionCodecSuite.scala
@@ -46,7 +46,7 @@ class CompressionCodecSuite extends SparkFunSuite {
 
   test("default compression codec") {
     val codec = CompressionCodec.createCodec(conf)
-    assert(codec.getClass === classOf[SnappyCompressionCodec])
+    assert(codec.getClass === classOf[LZ4CompressionCodec])
     testCodec(codec)
   }
 
diff --git a/docs/configuration.md b/docs/configuration.md
@@ -586,7 +586,7 @@ Apart from these, the following properties are also available, and may be useful
 </tr>
 <tr>
   <td><code>spark.io.compression.codec</code></td>
-  <td>snappy</td>
+  <td>lz4</td>
   <td>
     The codec used to compress internal data such as RDD partitions, broadcast variables and
     shuffle outputs. By default, Spark provides three codecs: <code>lz4</code>, <code>lzf</code>,

Original file line number	Diff line number	Diff line change
`@@ -46,7 +46,7 @@ class CompressionCodecSuite extends SparkFunSuite {`
`46`	`46`
`47`	`47`	`test("default compression codec") {`
`48`	`48`	`val codec = CompressionCodec.createCodec(conf)`
`49`		`- assert(codec.getClass === classOf[SnappyCompressionCodec])`
	`49`	`+ assert(codec.getClass === classOf[LZ4CompressionCodec])`
`50`	`50`	`testCodec(codec)`
`51`	`51`	`}`
`52`	`52`