apache/spark — pull request #2031 by CrazyJvm (2014-08-19 08:11:24+00:00)
Title: add spark.shuffle.spill.batchSize and fix the value of spark.shuffle.manager

```scala
private val serializerBatchSize = sparkConf.getLong("spark.shuffle.spill.batchSize", 10000)
```
add `spark.shuffle.spill.batchSize` to doc.

And according to
```scala
// Let the user specify short names for shuffle managers
val shortShuffleMgrNames = Map(
"hash" -> "org.apache.spark.shuffle.hash.HashShuffleManager",
"sort" -> "org.apache.spark.shuffle.sort.SortShuffleManager")
val shuffleMgrName = conf.get("spark.shuffle.manager", "hash")
```
value should be "hash" and "sort" rather than "HASH" and "SORT"