HDFS-7483. Display information per tier on the Namenode UI. Contributed by Benoy Antony and Haohui Mai.

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -388,6 +388,9 @@ Release 2.8.0 - UNRELEASED
 
     HDFS-8794. Improve CorruptReplicasMap#corruptReplicasMap. (yliu)
 
+    HDFS-7483. Display information per tier on the Namenode UI.
+    (Benoy Antony and wheat9 via wheat9)
+
   OPTIMIZATIONS
 
     HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/dfshealth.html

@@ -199,6 +199,31 @@
   {#failed}{#helper_dir_status type="Failed"/}{/failed}
   {/nn.NameDirStatuses}
 </table>
+<div class="page-header"><h1>DFS Storage Types</h1></div>
+<small>
+<table class="table">
+  <thead>
+    <tr>
+      <th>Storage Type</th>
+      <th>Configured Capacity</th>
+      <th>Capacity Used</th>
+      <th>Capacity Remaining</th>
+      <th>Block Pool Used</th>
+      <th>Nodes In Service</th>
+    </tr>
+  </thead>
+  {#blockstats.StorageTypeStats}
+  <tr>
+    <td>{key}</td>
+    <td>{value.capacityTotal|fmt_bytes}</td>
+    <td>{value.capacityUsed|fmt_bytes} ({value.capacityUsedPercentage|fmt_percentage})</td>
+    <td>{value.capacityRemaining|fmt_bytes} ({value.capacityRemainingPercentage|fmt_percentage})</td>
+    <td>{value.blockPoolUsed|fmt_bytes}</td>
+    <td>{value.nodesInService}</td>
+  </tr>
+  {/blockstats.StorageTypeStats}
+</table>
+</small>
 </script>
 
 <script type="text/x-dust-template" id="tmpl-snapshot">

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/dfshealth.js

@@ -29,6 +29,7 @@
       {"name": "nn",      "url": "/jmx?qry=Hadoop:service=NameNode,name=NameNodeInfo"},
       {"name": "nnstat",  "url": "/jmx?qry=Hadoop:service=NameNode,name=NameNodeStatus"},
       {"name": "fs",      "url": "/jmx?qry=Hadoop:service=NameNode,name=FSNamesystemState"},
+      {"name": "blockstats",      "url": "/jmx?qry=Hadoop:service=NameNode,name=BlockStats"},
       {"name": "mem",     "url": "/jmx?qry=java.lang:type=Memory"}
     ];
 
@@ -88,6 +89,13 @@
         for (var k in d) {
           data[k] = k === 'nn' ? workaround(d[k].beans[0]) : d[k].beans[0];
         }
+
+        var blockstats = data['blockstats'];
+        for (var k in blockstats.StorageTypeStats) {
+          var b = blockstats.StorageTypeStats[k].value;
+          b.capacityUsedPercentage = b.capacityUsed * 100.0 / b.capacityTotal;
+          b.capacityRemainingPercentage = b.capacityRemaining * 100.0 / b.capacityTotal;
+        }
         render();
       }),
       function (url, jqxhr, text, err) {

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockStatsMXBean.java

@@ -106,7 +106,6 @@ public class TestBlockStatsMXBean {
   public void testStorageTypeStatsJMX() throws Exception {
     URL baseUrl = new URL (cluster.getHttpUri(0));
     String result = readOutput(new URL(baseUrl, "/jmx"));
-    System.out.println(result);
 
     Map<String, Object> stat = (Map<String, Object>) JSON.parse(result);
     Object[] beans =(Object[]) stat.get("beans");