| <%@ page |
| contentType="text/html; charset=UTF-8" |
| import="javax.servlet.*" |
| import="javax.servlet.http.*" |
| import="java.io.*" |
| import="java.util.*" |
| import="org.apache.hadoop.dfs.*" |
| import="java.text.DateFormat" |
| %> |
| <%! |
| FSNamesystem fsn = FSNamesystem.getFSNamesystem(); |
| String namenodeLabel = fsn.getDFSNameNodeMachine() + ":" + fsn.getDFSNameNodePort(); |
| long currentTime; |
| JspHelper jspHelper = new JspHelper(); |
| |
| public void generateLiveNodeData(JspWriter out, DatanodeDescriptor d) |
| throws IOException { |
| long c = d.getCapacity(); |
| long r = d.getRemaining(); |
| long u = c - r; |
| String cGb = DFSShell.limitDecimal((1.0 * c)/(1024*1024*1024), 2); |
| String uGb = DFSShell.limitDecimal((1.0 * u)/(1024*1024*1024), 2); |
| String percentUsed; |
| if (c > 0) |
| percentUsed = DFSShell.limitDecimal(((1.0 * u)/c)*100, 2); |
| else |
| percentUsed = "100"; |
| out.print("<td style=\"vertical-align: top;\"> <b>" + |
| d.getName() + |
| "</b> <br><i><b>LastContact:</b> " + |
| (currentTime - d.getLastUpdate())/1000 + " second(s) back; "); |
| out.print("<b>Total raw bytes:</b> " + c + "(" + cGb + |
| " GB); "); |
| out.print("<b>Percent used:</b> " + percentUsed); |
| out.print("</i></td>"); |
| } |
| |
| public void generateDFSHealthReport(JspWriter out) throws IOException { |
| Vector live = new Vector(); |
| Vector dead = new Vector(); |
| jspHelper.DFSNodesStatus(live, dead); |
| if (live.isEmpty() && dead.isEmpty()) { |
| out.print("There are no datanodes in the cluster"); |
| } |
| else { |
| out.print("<br><b>Number of live data stores: " + live.size() + |
| ", dead datanodes: " + dead.size() + "</b></br>"); |
| out.print("<table style=\"width: 100%; text-align: left;\" border=\"1\""+ |
| " cellpadding=\"2\" cellspacing=\"2\">"); |
| out.print("<tbody>"); |
| out.print("<tr>"); |
| out.print("<td style=\"vertical-align: top;\"><B>Live Data Stores</B><br></td>"); |
| out.print("<td style=\"vertical-align: top;\"><B>Dead Data Stores</B><br></td>"); |
| out.print("</tr>"); |
| int i = 0; |
| int min = (live.size() > dead.size()) ? dead.size() : live.size(); |
| int max = (live.size() > dead.size()) ? live.size() : dead.size(); |
| currentTime = System.currentTimeMillis(); |
| for (i = 0; i < min; i++) { |
| DatanodeDescriptor l = (DatanodeDescriptor)live.elementAt(i); |
| DatanodeDescriptor d = (DatanodeDescriptor)dead.elementAt(i); |
| out.print("<tr>"); |
| generateLiveNodeData(out, l); |
| out.print("<td style=\"vertical-align: top;\">" + |
| d.getName() + |
| "<br></td>"); |
| out.print("</tr>"); |
| } |
| int type = (live.size() > dead.size()) ? 1 : 0; |
| for (i = min; i < max; i++) { |
| out.print("<tr>"); |
| if (type == 1) { |
| DatanodeDescriptor l = (DatanodeDescriptor)live.elementAt(i); |
| generateLiveNodeData(out, l); |
| out.print("<td style=\"vertical-align: top;\"><br></td>"); |
| } |
| else if (type == 0) { |
| DatanodeDescriptor d = (DatanodeDescriptor)dead.elementAt(i); |
| out.print("<td style=\"vertical-align: top;\"><br></td>"); |
| out.print("<td style=\"vertical-align: top;\">" + |
| d.getName() + |
| "<br></td>"); |
| } |
| out.print("</tr>"); |
| } |
| out.print("</tbody></table>"); |
| } |
| } |
| public String totalCapacity() { |
| return fsn.totalCapacity() + "(" + DFSShell.limitDecimal((1.0 * fsn.totalCapacity())/(1024*1024*1024), 2) + " GB)"; |
| } |
| public String totalRemaining() { |
| return fsn.totalRemaining() + "(" + DFSShell.limitDecimal(fsn.totalRemaining()/(1024*1024*1024), 2) + " GB)"; |
| } |
| %> |
| |
| <html> |
| |
| <title>Hadoop NameNode <%=namenodeLabel%></title> |
| |
| <body> |
| <h1>NameNode '<%=namenodeLabel%>'</h1> |
| |
| This NameNode has been up since <%= fsn.getStartTime()%>.<br><br> |
| <b><a href="/nn_browsedfscontent.jsp">Browse the filesystem</a></b> |
| <hr> |
| <h2>Cluster Summary</h2> |
| The capacity of this cluster is <%= totalCapacity()%> and remaining is <%= totalRemaining()%>. |
| <br> |
| <% |
| generateDFSHealthReport(out); |
| %> |
| <hr> |
| |
| <h2>Local logs</h2> |
| <a href="/logs/">Log</a> directory |
| |
| <hr> |
| <a href="http://lucene.apache.org/hadoop">Hadoop</a>, 2006.<br> |
| </body> |
| </html> |
