diff --git a/aws-experiment-launch/create_instances.py b/aws-experiment-launch/create_instances.py
index 033fa94a4..1745c9ae7 100644
--- a/aws-experiment-launch/create_instances.py
+++ b/aws-experiment-launch/create_instances.py
@@ -35,9 +35,9 @@ def run_one_region_instances(config, region_number, number_of_instances, instanc
         node_name_tag = create_instances(
             config, ec2_client, region_number, int(number_of_instances))
         print("Created %s in region %s" % (node_name_tag, region_number))
-        return node_name_tag
+        return node_name_tag, ec2_client
     else:
-        return None
+        return None, None
 
 
 def create_instances(config, ec2_client, region_number, number_of_instances):
@@ -90,27 +90,34 @@ if __name__ == "__main__":
         description='This script helps you start instances across multiple regions')
     parser.add_argument('--regions', type=str, dest='regions',
                         default='3', help="Supply a csv list of all regions")
-    parser.add_argument('--instances', type=str, dest='numInstances',
-                        default='1', help='number of instances')
-    parser.add_argument('--configuration', type=str,
-                        dest='config', default='configuration.txt')
+    parser.add_argument('--instances', type=str, dest='num_instance_list',
+                        default='1', help='number of instances in respective of region')
+    parser.add_argument('--region_config', type=str, dest='region_config', default='configuration.txt')
     parser.add_argument('--instance_output', type=str, dest='instance_output',
                         default='instance_output.txt', help='the file to append or write')
+    parser.add_argument('--instance_ids_output', type=str, dest='instance_ids_output',
+                        default='instance_ids_output.txt', help='the file to append or write')
     parser.add_argument('--append', dest='append', type=bool, default=False,
                         help='append to the current instance_output')
     args = parser.parse_args()
-    config = utils.read_region_config(args.config)
+    config = utils.read_region_config(args.region_config)
     region_list = args.regions.split(',')
-    instances_list = args.numInstances.split(',')
-    assert len(region_list) == len(instances_list), "number of regions: %d != number of instances per region: %d" % (len(region_list), len(instances_list))
+    num_instance_list = args.num_instance_list.split(',')
+    assert(len(region_list) == len(num_instance_list),
+           "number of regions: %d != number of instances per region: %d" % (len(region_list), len(num_instance_list)))
 
-    with open(args.instance_output, "a" if args.append else "w") as fout:
+    write_mode = "a" if args.append else "w"
+    with open(args.instance_output, write_mode) as fout, open(args.instance_ids_output, write_mode) as fout2:
         for i in range(len(region_list)):
             region_number = region_list[i]
-            number_of_instances = instances_list[i]
-            node_name_tag = run_one_region_instances(config, region_number, number_of_instances, InstanceResource.ON_DEMAND)
+            number_of_instances = num_instance_list[i]
+            node_name_tag, ec2_client = run_one_region_instances(config, region_number, number_of_instances, InstanceResource.ON_DEMAND)
             if node_name_tag:
                 print("Managed to create instances for region %s" % region_number )
                 fout.write("%s %s\n" % (node_name_tag, region_number))
+                filters = [{'Name': 'tag:Name','Values': [node_name_tag]}]
+                instance_ids = utils.get_instance_ids(ec2_client.describe_instances(Filters=filters))
+                for instance_id in instance_ids:
+                    fout2.write(instance_id + " " + node_name_tag + " " + region_number)
             else:
-                print("Failed to create instances for region %s" % region_number )
+                print("Failed to create instances for region %s" % region_number )
\ No newline at end of file