diff --git a/watcher/decision_engine/strategy/strategies/host_maintenance.py b/watcher/decision_engine/strategy/strategies/host_maintenance.py
index ccd3a306b..5e5479cfb 100644
--- a/watcher/decision_engine/strategy/strategies/host_maintenance.py
+++ b/watcher/decision_engine/strategy/strategies/host_maintenance.py
@@ -133,9 +133,9 @@ class HostMaintenance(base.HostMaintenanceBaseStrategy):
         :param node: node object
         :return: dict(cpu(cores), ram(MB), disk(B))
         """
-        return dict(cpu=node.vcpus,
-                    ram=node.memory,
-                    disk=node.disk)
+        return dict(cpu=node.vcpu_capacity,
+                    ram=node.memory_mb_capacity,
+                    disk=node.disk_gb_capacity)
 
     def get_node_used(self, node):
         """Collect cpu, ram and disk used of a node.
diff --git a/watcher/tests/decision_engine/model/data/scenario_1.xml b/watcher/tests/decision_engine/model/data/scenario_1.xml
index 933399961..83cc43496 100644
--- a/watcher/tests/decision_engine/model/data/scenario_1.xml
+++ b/watcher/tests/decision_engine/model/data/scenario_1.xml
@@ -1,20 +1,20 @@
 <ModelRoot>
-  <ComputeNode uuid="Node_0" status="enabled" state="up" id="0" hostname="hostname_0" vcpus="40" disk="250" disk_capacity="250" memory="132">
+  <ComputeNode uuid="Node_0" status="enabled" state="up" id="0" hostname="hostname_0" vcpus="40" vcpu_reserved="0" vcpu_ratio="1" disk="250" disk_gb_reserved="0" disk_ratio="1" disk_capacity="250" memory="132" memory_mb_reserved="0" memory_ratio="1">
     <Instance watcher_exclude="False" state="active" name="INSTANCE_0" uuid="INSTANCE_0" vcpus="10" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
     <Instance watcher_exclude="False" state="active" name="INSTANCE_1" uuid="INSTANCE_1" vcpus="10" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="26F03131-32CB-4697-9D61-9123F87A8147"/>
   </ComputeNode>
-  <ComputeNode uuid="Node_1" status="enabled" state="up" id="1" hostname="hostname_1" vcpus="40" disk="250" disk_capacity="250" memory="132">
+  <ComputeNode uuid="Node_1" status="enabled" state="up" id="1" hostname="hostname_1" vcpus="40" vcpu_reserved="0" vcpu_ratio="1" disk="250" disk_gb_reserved="0" disk_ratio="1" disk_capacity="250" memory="132" memory_mb_reserved="0" memory_ratio="1">
     <Instance watcher_exclude="False" state="active" name="INSTANCE_2" uuid="INSTANCE_2" vcpus="10" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="109F7909-0607-4712-B32C-5CC6D49D2F15"/>
   </ComputeNode>
-  <ComputeNode uuid="Node_2" status="enabled" state="up" id="2" hostname="hostname_2" vcpus="40" disk="250" disk_capacity="250" memory="132">
+  <ComputeNode uuid="Node_2" status="enabled" state="up" id="2" hostname="hostname_2" vcpus="40" vcpu_reserved="0" vcpu_ratio="1" disk="250" disk_gb_reserved="0" disk_ratio="1" disk_capacity="250" memory="132" memory_mb_reserved="0" memory_ratio="1">
     <Instance watcher_exclude="False" state="active" name="INSTANCE_3" uuid="INSTANCE_3" vcpus="10" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
     <Instance watcher_exclude="False" state="active" name="INSTANCE_4" uuid="INSTANCE_4" vcpus="10" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
     <Instance watcher_exclude="False" state="active" name="INSTANCE_5" uuid="INSTANCE_5" vcpus="10" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
   </ComputeNode>
-  <ComputeNode uuid="Node_3" status="enabled" state="up" id="3" hostname="hostname_3" vcpus="40" disk="250" disk_capacity="250" memory="132">
+  <ComputeNode uuid="Node_3" status="enabled" state="up" id="3" hostname="hostname_3" vcpus="40" vcpu_reserved="0" vcpu_ratio="1" disk="250" disk_gb_reserved="0" disk_ratio="1" disk_capacity="250" memory="132" memory_mb_reserved="0" memory_ratio="1">
     <Instance watcher_exclude="False" state="active" name="INSTANCE_6" uuid="INSTANCE_6" vcpus="10" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
   </ComputeNode>
-  <ComputeNode uuid="Node_4" status="enabled" state="up" id="4" hostname="hostname_4" vcpus="40" disk="250" disk_capacity="250" memory="132">
+  <ComputeNode uuid="Node_4" status="enabled" state="up" id="4" hostname="hostname_4" vcpus="40" vcpu_reserved="0" vcpu_ratio="1" disk="250" disk_gb_reserved="0" disk_ratio="1" disk_capacity="250" memory="132" memory_mb_reserved="0" memory_ratio="1">
     <Instance watcher_exclude="False" state="active" name="INSTANCE_7" uuid="INSTANCE_7" vcpus="10" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
   </ComputeNode>
   <Instance watcher_exclude="False" state="active" name="INSTANCE_10" uuid="INSTANCE_10" vcpus="10" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
diff --git a/watcher/tests/decision_engine/model/data/scenario_1_with_all_nodes_disable.xml b/watcher/tests/decision_engine/model/data/scenario_1_with_all_nodes_disable.xml
index a2f9ea2a9..7ee44a612 100644
--- a/watcher/tests/decision_engine/model/data/scenario_1_with_all_nodes_disable.xml
+++ b/watcher/tests/decision_engine/model/data/scenario_1_with_all_nodes_disable.xml
@@ -1,8 +1,8 @@
 <ModelRoot>
-  <ComputeNode hostname="hostname_0" uuid="Node_0" id="0" state="up" status="disabled" vcpus="40" disk="250" disk_capacity="250" disabled_reason='watcher_disabled' memory="64">
+  <ComputeNode hostname="hostname_0" uuid="Node_0" id="0" state="up" status="disabled" vcpus="40" vcpu_reserved="0" vcpu_ratio="1" disk="250" disk_gb_reserved="0" disk_ratio="1" disk_capacity="250" disabled_reason='watcher_disabled' memory="64" memory_mb_reserved="0" memory_ratio="1">
     <Instance watcher_exclude="False" name="" state="active" uuid="INSTANCE_0" vcpus="10" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
   </ComputeNode>
-  <ComputeNode hostname="hostname_1" uuid="Node_1" id="1" state="up" status="disabled" vcpus="40" disk="250" disk_capacity="250" disabled_reason='watcher_disabled' memory="64">
+  <ComputeNode hostname="hostname_1" uuid="Node_1" id="1" state="up" status="disabled" vcpus="40" vcpu_reserved="0" vcpu_ratio="1" disk="250" disk_gb_reserved="0" disk_ratio="1" disk_capacity="250" disabled_reason='watcher_disabled' memory="64" memory_mb_reserved="0" memory_ratio="1">
     <Instance watcher_exclude="False" name="" state="active" uuid="INSTANCE_1" vcpus="10" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
   </ComputeNode>
 </ModelRoot>
diff --git a/watcher/tests/decision_engine/model/data/scenario_9_with_3_active_plus_1_disabled_nodes.xml b/watcher/tests/decision_engine/model/data/scenario_9_with_3_active_plus_1_disabled_nodes.xml
index bdc602a0d..9c7b66afb 100644
--- a/watcher/tests/decision_engine/model/data/scenario_9_with_3_active_plus_1_disabled_nodes.xml
+++ b/watcher/tests/decision_engine/model/data/scenario_9_with_3_active_plus_1_disabled_nodes.xml
@@ -1,16 +1,16 @@
 <ModelRoot>
-  <ComputeNode hostname="hostname_0" uuid="Node_0" id="0" state="up" status="enabled" vcpus="16" disk="250" disk_capacity="250" memory="64">
+  <ComputeNode hostname="hostname_0" uuid="Node_0" id="0" state="up" status="enabled" vcpus="16" vcpu_reserved="0" vcpu_ratio="1" disk="250" disk_gb_reserved="0" disk_ratio="1" disk_capacity="250" memory="64" memory_mb_reserved="0" memory_ratio="1">
     <Instance watcher_exclude="False" name="" state="active" uuid="INSTANCE_0" vcpus="2" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
     <Instance watcher_exclude="False" name="" state="active" uuid="INSTANCE_1" vcpus="2" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
     <Instance watcher_exclude="False" name="" state="active" uuid="INSTANCE_2" vcpus="2" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
   </ComputeNode>
-  <ComputeNode hostname="hostname_1" uuid="Node_1" id="1" state="up" status="enabled" vcpus="16" disk="250" disk_capacity="250" memory="64">
+  <ComputeNode hostname="hostname_1" uuid="Node_1" id="1" state="up" status="enabled" vcpus="16" vcpu_reserved="0" vcpu_ratio="1" disk="250" disk_gb_reserved="0" disk_ratio="1" disk_capacity="250" memory="64" memory_mb_reserved="0" memory_ratio="1">
     <Instance watcher_exclude="False" name="" state="active" uuid="INSTANCE_3" vcpus="2" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
   </ComputeNode>
-  <ComputeNode hostname="hostname_2" uuid="Node_2" id="2" state="up" status="enabled" vcpus="16" disk="250" disk_capacity="250" memory="64">
+  <ComputeNode hostname="hostname_2" uuid="Node_2" id="2" state="up" status="enabled" vcpus="16" vcpu_reserved="0" vcpu_ratio="1" disk="250" disk_gb_reserved="0" disk_ratio="1" disk_capacity="250" memory="64" memory_mb_reserved="0" memory_ratio="1">
     <Instance watcher_exclude="False" name="" state="active" uuid="INSTANCE_4" vcpus="2" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
   </ComputeNode>
-  <ComputeNode hostname="hostname_3" uuid="Node_3" id="3" state="up" status="disabled" disabled_reason='watcher_disabled' vcpus="16" disk="250" disk_capacity="250" memory="64">
+  <ComputeNode hostname="hostname_3" uuid="Node_3" id="3" state="up" status="disabled" disabled_reason='watcher_disabled' vcpus="16" vcpu_reserved="0" vcpu_ratio="1" disk="250" disk_gb_reserved="0" disk_ratio="1" disk_capacity="250" memory="64" memory_mb_reserved="0" memory_ratio="1">
     <Instance watcher_exclude="False" name="" state="active" uuid="INSTANCE_5" vcpus="2" disk="20" disk_capacity="20" memory="2" metadata='{"optimize": true,"top": "floor", "nested": {"x": "y"}}' project_id="91FFFE30-78A0-4152-ACD2-8310FF274DC9"/>
   </ComputeNode>
 </ModelRoot>
diff --git a/watcher/tests/decision_engine/model/faker_cluster_state.py b/watcher/tests/decision_engine/model/faker_cluster_state.py
index a64f2a7bb..51ca228c5 100644
--- a/watcher/tests/decision_engine/model/faker_cluster_state.py
+++ b/watcher/tests/decision_engine/model/faker_cluster_state.py
@@ -82,9 +82,15 @@ class FakerModelCollector(base.BaseClusterDataModelCollector):
                 "uuid": node_uuid,
                 "hostname": hostname,
                 "memory": 132,
+                "memory_mb_reserved": 0,
+                "memory_ratio": 1,
                 "disk": 250,
                 "disk_capacity": 250,
+                "disk_gb_reserved": 0,
+                "disk_ratio": 1,
                 "vcpus": 40,
+                "vcpu_reserved": 0,
+                "vcpu_ratio": 1,
             }
             node = element.ComputeNode(**node_attributes)
             model.add_node(node)