docker-java
@@ -63,6 +63,9 @@ public class InspectContainerResponse extends DockerObject {
     @JsonProperty("SizeRootFs")
     private Integer sizeRootFs;
 
+    @JsonProperty("SizeRw")
+    private Integer sizeRw;
+
     @JsonProperty("Image")
     private String imageId;
 
@@ -125,6 +128,10 @@ public Integer getSizeRootFs() {
         return sizeRootFs;
     }
 
+    public Integer getSizeRw() {
+        return sizeRw;
+    }
+
     public String getCreated() {
         return created;
     }

@@ -101,6 +101,8 @@ public void inspectContainerWithSize() throws DockerException {
         if (isNotSwarm(dockerRule.getClient())) {
             assertNotNull(containerInfo.getSizeRootFs());
             assertTrue(containerInfo.getSizeRootFs().intValue() > 0);
+            assertNotNull(containerInfo.getSizeRw());
+            assertTrue(containerInfo.getSizeRw().intValue() == 0);
         }
     }
 

@@ -6,6 +6,7 @@
       "postgres"
     ],
     "SizeRootFs" : null,
+    "SizeRw" : null,
     "HostConfig" : {
       "KernelMemory" : 0,
       "MemorySwappiness" : -1,

@@ -10,6 +10,7 @@
     "Created": 1455662451,
     "Ports": [],
     "SizeRootFs": 1113554,
+    "SizeRw": 0,
     "Labels": {},
     "Status": "Up Less than a second",
     "HostConfig": {