Only group elements ten at a time into SequenceFile records in

saveAsObjectFile

core/src/main/scala/spark/RDD.scala

@@ -415,7 +415,7 @@ abstract class RDD[T: ClassManifest](@transient sc: SparkContext) extends Serial
   }
 
   def saveAsObjectFile(path: String) {
-    this.glom
+    this.mapPartitions(iter => iter.grouped(10).map(_.toArray))
       .map(x => (NullWritable.get(), new BytesWritable(Utils.serialize(x))))
       .saveAsSequenceFile(path)
   }
@@ -424,4 +424,4 @@ abstract class RDD[T: ClassManifest](@transient sc: SparkContext) extends Serial
   private[spark] def collectPartitions(): Array[Array[T]] = {
     sc.runJob(this, (iter: Iterator[T]) => iter.toArray)
   }
-}
+}