diff --git a/code/daisy/daisy/api/backends/kolla/common.py b/code/daisy/daisy/api/backends/kolla/common.py
index 90e5932c..42d297d1 100755
--- a/code/daisy/daisy/api/backends/kolla/common.py
+++ b/code/daisy/daisy/api/backends/kolla/common.py
@@ -441,7 +441,7 @@ def version_load_mcast(kolla_version_pkg_file, hosts_list):
 
     # TODO: impl. daisy_conf_mcast_enabled
     daisy_conf_mcast_enabled = _daisy_conf_mcast_flag()
-    if daisy_conf_mcast_enabled != True:
+    if daisy_conf_mcast_enabled != 'True':
         return -1
     mcobjset = []
     mcobj = MulticastServerTask(kolla_version_pkg_file, hosts_list)
diff --git a/code/daisy/daisy/api/backends/kolla/install.py b/code/daisy/daisy/api/backends/kolla/install.py
index 27e7ec61..c2a46991 100755
--- a/code/daisy/daisy/api/backends/kolla/install.py
+++ b/code/daisy/daisy/api/backends/kolla/install.py
@@ -609,8 +609,8 @@ class KOLLAInstallTask(Thread):
                     raise exception.InstallException(self.message)
                 else:
                     self.progress = _calc_progress(self.log_file)
-                if execute_times >= 720:
-                    self.message = "KOLLA deploy openstack timeout for an hour"
+                if execute_times >= 1440:
+                    self.message = "KOLLA deploy openstack timeout"
                     LOG.error(self.message)
                     raise exception.InstallTimeoutException(
                         cluster_id=self.cluster_id)
diff --git a/code/daisy/etc/daisy-api.conf b/code/daisy/etc/daisy-api.conf
index 098dc3a9..2dd6301e 100755
--- a/code/daisy/etc/daisy-api.conf
+++ b/code/daisy/etc/daisy-api.conf
@@ -48,10 +48,10 @@ workers = 4
 # max_header_line = 16384
 
 # Maximum number of hosts install os at the same time.
-max_parallel_os_number = 10
+max_parallel_os_number = 20
 
 # Maximum number of hosts upgrade os at the same time.
-max_parallel_os_upgrade_number = 10
+max_parallel_os_upgrade_number = 20
 
 # Role used to identify an authenticated user as administrator
 #admin_role = admin
diff --git a/tools/daisy-utils/daisy.conf b/tools/daisy-utils/daisy.conf
index be76171e..ff91481f 100755
--- a/tools/daisy-utils/daisy.conf
+++ b/tools/daisy-utils/daisy.conf
@@ -8,7 +8,7 @@ daisy_management_ip=
 #If you want to create a cluster with more than one backend,
 #all backend names should be provided for this configuration item,
 #such as, default_backend_types=tecs,zenic,proton,kolla.
-default_backend_types=tecs
+default_backend_types=kolla
 
 [OS]
 #Default os install types of daisy
@@ -34,5 +34,6 @@ client_ip_begin=99.99.1.50
 client_ip_end=99.99.1.150
 
 [multicast]
-#enabled multicast or not.
+#enabled multicast or not.if enabled multicast please set this to 'True'.
+#such as daisy_conf_mcast_enabled=True
 daisy_conf_mcast_enabled=False