diff --git a/server/website/website/models.py b/server/website/website/models.py
index 3954a85..f51dc75 100644
--- a/server/website/website/models.py
+++ b/server/website/website/models.py
@@ -185,7 +185,8 @@ class Session(BaseModel):
     description = models.TextField(null=True, blank=True)
     dbms = models.ForeignKey(DBMSCatalog)
     hardware = models.ForeignKey(Hardware)
-    algorithm = models.IntegerField(choices=AlgorithmType.choices())
+    algorithm = models.IntegerField(choices=AlgorithmType.choices(),
+                                    default=AlgorithmType.OTTERTUNE)
 
     project = models.ForeignKey(Project)
     creation_time = models.DateTimeField()
diff --git a/server/website/website/views.py b/server/website/website/views.py
index 7637896..2895839 100644
--- a/server/website/website/views.py
+++ b/server/website/website/views.py
@@ -527,9 +527,17 @@ def handle_result_files(session, files):
         return HttpResponse("Result stored successfully!")
 
     result_id = result.pk
-    response = chain(aggregate_target_results.s(result.pk),
-                     map_workload.s(),
-                     configuration_recommendation.s()).apply_async()
+    response = None
+    if session.algorithm == AlgorithmType.OTTERTUNE:
+        response = chain(aggregate_target_results.s(result.pk),
+                         map_workload.s(),
+                         configuration_recommendation.s()).apply_async()
+    elif session.algorithm == AlgorithmType.ALGORITHM1:
+        pass
+    elif session.algorithm == AlgorithmType.ALGORITHM2:
+        pass
+    elif session.algorithm == AlgorithmType.ALGORITHM3:
+        pass
     taskmeta_ids = [response.parent.parent.id, response.parent.id, response.id]
     result.task_ids = ','.join(taskmeta_ids)
     result.save()