| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.dfs; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.dfs.namenode.metrics.NameNodeStatistics; |
| import org.apache.hadoop.metrics.*; |
| import org.apache.hadoop.metrics.jvm.JvmMetrics; |
| import org.apache.hadoop.metrics.util.MetricsIntValue; |
| import org.apache.hadoop.metrics.util.MetricsTimeVaryingInt; |
| import org.apache.hadoop.metrics.util.MetricsTimeVaryingRate; |
| |
| /** |
| * |
| * This class is for maintaining the various NameNode statistics |
| * and publishing them through the metrics interfaces. |
| * This also registers the JMX MBean for RPC. |
| * <p> |
| * This class has a number of metrics variables that are publicly accessible; |
| * these variables (objects) have methods to update their values; |
| * for example: |
| * <p> {@link #syncs}.inc() |
| * |
| */ |
| public class NameNodeMetrics implements Updater { |
| private static Log log = LogFactory.getLog(NameNodeMetrics.class); |
| private final MetricsRecord metricsRecord; |
| |
| private NameNodeStatistics namenodeStats; |
| |
| public MetricsTimeVaryingInt numFilesCreated = new MetricsTimeVaryingInt("FilesCreated"); |
| public MetricsTimeVaryingInt numGetBlockLocations = new MetricsTimeVaryingInt("GetBlockLocations"); |
| public MetricsTimeVaryingInt numFilesRenamed = new MetricsTimeVaryingInt("FilesRenamed"); |
| public MetricsTimeVaryingInt numGetListingOps = |
| new MetricsTimeVaryingInt("GetListingOps"); |
| public MetricsTimeVaryingInt numCreateFileOps = |
| new MetricsTimeVaryingInt("CreateFileOps"); |
| public MetricsTimeVaryingInt numDeleteFileOps = |
| new MetricsTimeVaryingInt("DeleteFileOps"); |
| public MetricsTimeVaryingInt numAddBlockOps = |
| new MetricsTimeVaryingInt("AddBlockOps"); |
| |
| public MetricsTimeVaryingRate transactions = new MetricsTimeVaryingRate("Transactions"); |
| public MetricsTimeVaryingRate syncs = new MetricsTimeVaryingRate("Syncs"); |
| public MetricsTimeVaryingRate blockReport = new MetricsTimeVaryingRate("blockReport"); |
| public MetricsIntValue safeModeTime = new MetricsIntValue("SafemodeTime"); |
| public MetricsIntValue fsImageLoadTime = |
| new MetricsIntValue("fsImageLoadTime"); |
| public MetricsIntValue numBlocksCorrupted = new MetricsIntValue("BlocksCorrupted"); |
| |
| |
| NameNodeMetrics(Configuration conf, NameNode nameNode) { |
| String sessionId = conf.get("session.id"); |
| // Initiate Java VM metrics |
| JvmMetrics.init("NameNode", sessionId); |
| |
| |
| // Now the Mbean for the name node - this alos registers the MBean |
| namenodeStats = new NameNodeStatistics(this); |
| |
| // Create a record for NameNode metrics |
| MetricsContext metricsContext = MetricsUtil.getContext("dfs"); |
| metricsRecord = MetricsUtil.createRecord(metricsContext, "namenode"); |
| metricsRecord.setTag("sessionId", sessionId); |
| metricsContext.registerUpdater(this); |
| log.info("Initializing NameNodeMeterics using context object:" + |
| metricsContext.getClass().getName()); |
| } |
| |
| |
| |
| public void shutdown() { |
| if (namenodeStats != null) |
| namenodeStats.shutdown(); |
| } |
| |
| /** |
| * Since this object is a registered updater, this method will be called |
| * periodically, e.g. every 5 seconds. |
| */ |
| public void doUpdates(MetricsContext unused) { |
| synchronized (this) { |
| numFilesCreated.pushMetric(metricsRecord); |
| numGetBlockLocations.pushMetric(metricsRecord); |
| numFilesRenamed.pushMetric(metricsRecord); |
| numGetListingOps.pushMetric(metricsRecord); |
| numCreateFileOps.pushMetric(metricsRecord); |
| numDeleteFileOps.pushMetric(metricsRecord); |
| numAddBlockOps.pushMetric(metricsRecord); |
| |
| transactions.pushMetric(metricsRecord); |
| syncs.pushMetric(metricsRecord); |
| blockReport.pushMetric(metricsRecord); |
| safeModeTime.pushMetric(metricsRecord); |
| fsImageLoadTime.pushMetric(metricsRecord); |
| numBlocksCorrupted.pushMetric(metricsRecord); |
| } |
| metricsRecord.update(); |
| } |
| |
| public void resetAllMinMax() { |
| transactions.resetMinMax(); |
| syncs.resetMinMax(); |
| blockReport.resetMinMax(); |
| } |
| |
| } |