[DIST] Add Distributed XGBoost on AWS Tutorial

demo/distributed-training/run_aws.sh

@@ -0,0 +1,11 @@
+# This is the example script to run distributed xgboost on AWS.
+# Change the following two lines for configuration
+
+export BUCKET=mybucket
+
+# submit the job to YARN
+../../dmlc-core/tracker/dmlc-submit --cluster=yarn --num-workers=2 --worker-cores=2\
+    ../../xgboost mushroom.aws.conf nthread=2\
+    data=s3://${BUCKET}/xgb-demo/train\
+    eval[test]=s3://${BUCKET}/xgb-demo/test\
+    model_dir=s3://${BUCKET}/xgb-demo/model