diff --git a/configs-examples/default.yaml b/configs-examples/default.yaml
index ef62590..c1ee515 100644
--- a/configs-examples/default.yaml
+++ b/configs-examples/default.yaml
@@ -127,3 +127,23 @@
     openstack_ceph: OS_1_to_1 + ceph_vdb
     openstack_cinder: OS_1_to_1 + ceph_iscsi_vdb
     openstack_nova: OS_1_to_1 + nova_io
+
+
+default_dev_roles:
+    - role=testnode:
+        - type=cpu: client_cpu
+        - type=block: client_disk
+        - type=eth: client_net
+        - type=weth: client_net
+
+    - role=storage:
+        - type=cpu: storage_cpu
+        - type=block: storage_disk
+        - type=eth: storage_net
+        - type=weth: storage_net
+
+    - role=compute:
+        - type=cpu: compute_cpu
+        - type=block: compute_disk
+        - type=eth: compute_net
+        - type=weth: compute_net
diff --git a/configs-examples/perf_lab.yml b/configs-examples/perf_lab.yml
index 086d11c..3059aa9 100644
--- a/configs-examples/perf_lab.yml
+++ b/configs-examples/perf_lab.yml
@@ -20,7 +20,7 @@
     root@cz7626: testnode
     root@cz7627: testnode
 
-sleep: 300
+# sleep: 5
 
 tests:
   - fio:
@@ -28,4 +28,15 @@
       params:
           FILENAME: /dev/rbd0
           FILESIZE: 700G
+          RUNTIME: 600
 
+
+dev_roles:
+    - role=testnode:
+        - rbd0: client_disk
+    - role=ceph-osd:
+        - sd[g-z]: [storage_disk, ceph_storage]
+        - sd[c-f]: [storage_disk, ceph_journal]
+    - role=compute:
+        - type=hdd: compute_disk
+        - type=eth: compute_net