HDFS-16678. RBF should supports disable getNodeUsage() in RBFMetrics (#4606)
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@ -50,6 +50,7 @@
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import javax.management.ObjectName;
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import javax.management.StandardMBean;
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import org.apache.commons.math3.stat.descriptive.moment.StandardDeviation;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
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import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType;
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@ -113,6 +114,8 @@ public class RBFMetrics implements RouterMBean, FederationMBean {
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/** Prevent holding the page from load too long. */
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private final long timeOut;
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/** Enable/Disable getNodeUsage. **/
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private boolean enableGetDNUsage;
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/** Router interface. */
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private final Router router;
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@ -175,6 +178,8 @@ public RBFMetrics(Router router) throws IOException {
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Configuration conf = router.getConfig();
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this.timeOut = conf.getTimeDuration(RBFConfigKeys.DN_REPORT_TIME_OUT,
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RBFConfigKeys.DN_REPORT_TIME_OUT_MS_DEFAULT, TimeUnit.MILLISECONDS);
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this.enableGetDNUsage = conf.getBoolean(RBFConfigKeys.DFS_ROUTER_ENABLE_GET_DN_USAGE_KEY,
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RBFConfigKeys.DFS_ROUTER_ENABLE_GET_DN_USAGE_DEFAULT);
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this.topTokenRealOwners = conf.getInt(
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RBFConfigKeys.DFS_ROUTER_METRICS_TOP_NUM_TOKEN_OWNERS_KEY,
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RBFConfigKeys.DFS_ROUTER_METRICS_TOP_NUM_TOKEN_OWNERS_KEY_DEFAULT);
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@ -184,6 +189,11 @@ public RBFMetrics(Router router) throws IOException {
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ms.register(RBFMetrics.class.getName(), "RBFActivity Metrics", this);
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}
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@VisibleForTesting
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public void setEnableGetDNUsage(boolean enableGetDNUsage) {
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this.enableGetDNUsage = enableGetDNUsage;
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}
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/**
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* Unregister the JMX beans.
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*/
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@ -537,35 +547,34 @@ public int getNumEnteringMaintenanceDataNodes() {
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@Override // NameNodeMXBean
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public String getNodeUsage() {
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float median = 0;
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float max = 0;
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float min = 0;
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float dev = 0;
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double median = 0;
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double max = 0;
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double min = 0;
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double dev = 0;
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final Map<String, Map<String, Object>> info = new HashMap<>();
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try {
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DatanodeInfo[] live = null;
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if (this.enableGetDNUsage) {
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RouterRpcServer rpcServer = this.router.getRpcServer();
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DatanodeInfo[] live = rpcServer.getDatanodeReport(
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DatanodeReportType.LIVE, false, timeOut);
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live = rpcServer.getDatanodeReport(DatanodeReportType.LIVE, false, timeOut);
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} else {
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LOG.debug("Getting node usage is disabled.");
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}
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if (live.length > 0) {
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float totalDfsUsed = 0;
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float[] usages = new float[live.length];
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if (live != null && live.length > 0) {
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double[] usages = new double[live.length];
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int i = 0;
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for (DatanodeInfo dn : live) {
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usages[i++] = dn.getDfsUsedPercent();
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totalDfsUsed += dn.getDfsUsedPercent();
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}
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totalDfsUsed /= live.length;
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Arrays.sort(usages);
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median = usages[usages.length / 2];
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max = usages[usages.length - 1];
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min = usages[0];
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for (i = 0; i < usages.length; i++) {
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dev += (usages[i] - totalDfsUsed) * (usages[i] - totalDfsUsed);
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}
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dev = (float) Math.sqrt(dev / usages.length);
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StandardDeviation deviation = new StandardDeviation();
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dev = deviation.evaluate(usages);
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}
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} catch (IOException e) {
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LOG.error("Cannot get the live nodes: {}", e.getMessage());
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@ -321,6 +321,9 @@ public class RBFConfigKeys extends CommonConfigurationKeysPublic {
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FEDERATION_ROUTER_PREFIX + "dn-report.cache-expire";
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public static final long DN_REPORT_CACHE_EXPIRE_MS_DEFAULT =
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TimeUnit.SECONDS.toMillis(10);
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public static final String DFS_ROUTER_ENABLE_GET_DN_USAGE_KEY =
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FEDERATION_ROUTER_PREFIX + "enable.get.dn.usage";
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public static final boolean DFS_ROUTER_ENABLE_GET_DN_USAGE_DEFAULT = true;
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// HDFS Router-based federation quota
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public static final String DFS_ROUTER_QUOTA_ENABLE =
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@ -195,6 +195,16 @@
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</description>
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</property>
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<property>
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<name>dfs.federation.router.enable.get.dn.usage</name>
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<value>true</value>
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<description>
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If true, the getNodeUsage method in RBFMetrics will return an up-to-date
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result collecting from downstream nameservices. But it will take a long
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time and take up thread resources. If false, it will return a mock result with all 0.
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</description>
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</property>
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<property>
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<name>dfs.federation.router.metrics.class</name>
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<value>org.apache.hadoop.hdfs.server.federation.metrics.FederationRPCPerformanceMonitor</value>
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@ -131,6 +131,7 @@
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import org.apache.hadoop.service.Service.STATE;
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import org.apache.hadoop.test.GenericTestUtils;
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import org.apache.hadoop.test.LambdaTestUtils;
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import org.codehaus.jettison.json.JSONException;
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import org.codehaus.jettison.json.JSONObject;
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import org.junit.AfterClass;
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import org.junit.Before;
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@ -2181,4 +2182,34 @@ public void testContentSummaryWithSnapshot() throws Exception {
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routerDFS.delete(dirPath, true);
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}
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}
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@Test
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public void testDisableNodeUsageInRBFMetrics() throws JSONException {
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RBFMetrics rbfMetrics = router.getRouter().getMetrics();
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FederationRPCMetrics federationRPCMetrics = router.getRouter().getRpcServer().getRPCMetrics();
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long proxyOpBefore = federationRPCMetrics.getProxyOps();
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String nodeUsageEnable = router.getRouter().getMetrics().getNodeUsage();
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assertNotNull(nodeUsageEnable);
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long proxyOpAfterWithEnable = federationRPCMetrics.getProxyOps();
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assertEquals(proxyOpBefore + 2, proxyOpAfterWithEnable);
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rbfMetrics.setEnableGetDNUsage(false);
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String nodeUsageDisable = rbfMetrics.getNodeUsage();
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assertNotNull(nodeUsageDisable);
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long proxyOpAfterWithDisable = federationRPCMetrics.getProxyOps();
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assertEquals(proxyOpAfterWithEnable, proxyOpAfterWithDisable);
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JSONObject jsonObject = new JSONObject(nodeUsageDisable);
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JSONObject json = jsonObject.getJSONObject("nodeUsage");
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assertEquals("0.00%", json.get("min"));
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assertEquals("0.00%", json.get("median"));
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assertEquals("0.00%", json.get("max"));
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assertEquals("0.00%", json.get("stdDev"));
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rbfMetrics.setEnableGetDNUsage(true);
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String nodeUsageWithReEnable = rbfMetrics.getNodeUsage();
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assertNotNull(nodeUsageWithReEnable);
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long proxyOpAfterWithReEnable = federationRPCMetrics.getProxyOps();
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assertEquals(proxyOpAfterWithDisable + 2, proxyOpAfterWithReEnable);
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}
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}
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