| /** |
| * 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.metrics.*; |
| import org.apache.hadoop.metrics.util.MetricsIntValue; |
| |
| /** |
| * |
| * This class is for maintaining the various FSNamesystem status metrics |
| * 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 #filesTotal}.set() |
| * |
| */ |
| public class FSNamesystemMetrics implements Updater { |
| private static Log log = LogFactory.getLog(FSNamesystemMetrics.class); |
| private final MetricsRecord metricsRecord; |
| private FSNamesystem fsNameSystem; |
| |
| public MetricsIntValue filesTotal = new MetricsIntValue("FilesTotal"); |
| public MetricsIntValue blocksTotal = new MetricsIntValue("BlocksTotal"); |
| public MetricsIntValue capacityTotalGB = new MetricsIntValue("CapacityTotalGB"); |
| public MetricsIntValue capacityUsedGB = new MetricsIntValue("CapacityUsedGB"); |
| public MetricsIntValue capacityRemainingGB = new MetricsIntValue("CapacityRemainingGB"); |
| public MetricsIntValue totalLoad = new MetricsIntValue("TotalLoad"); |
| public MetricsIntValue pendingReplicationBlocks = new MetricsIntValue("PendingReplicationBlocks"); |
| public MetricsIntValue underReplicatedBlocks = new MetricsIntValue("UnderReplicatedBlocks"); |
| public MetricsIntValue scheduledReplicationBlocks = new MetricsIntValue("ScheduledReplicationBlocks"); |
| FSNamesystemMetrics(Configuration conf) { |
| String sessionId = conf.get("session.id"); |
| |
| // Create a record for FSNamesystem metrics |
| MetricsContext metricsContext = MetricsUtil.getContext("dfs"); |
| metricsRecord = MetricsUtil.createRecord(metricsContext, "FSNamesystem"); |
| metricsRecord.setTag("sessionId", sessionId); |
| metricsContext.registerUpdater(this); |
| log.info("Initializing FSNamesystemMeterics using context object:" + |
| metricsContext.getClass().getName()); |
| } |
| |
| private int roundBytesToGBytes(long bytes) { |
| return Math.round(((float)bytes/(1024 * 1024 * 1024))); |
| } |
| |
| /** |
| * Since this object is a registered updater, this method will be called |
| * periodically, e.g. every 5 seconds. |
| * We set the metrics value within this function before pushing it out. |
| * FSNamesystem updates its own local variables which are |
| * light weight compared to Metrics counters. |
| * |
| * Some of the metrics are explicity casted to int. Few metrics collectors |
| * do not handle long values. It is safe to cast to int for now as all these |
| * values fit in int value. |
| * Metrics related to DFS capacity are stored in bytes which do not fit in |
| * int, so they are rounded to GB |
| */ |
| public void doUpdates(MetricsContext unused) { |
| synchronized (this) { |
| FSNamesystem fsNameSystem = FSNamesystem.getFSNamesystem(); |
| filesTotal.set((int)fsNameSystem.getFilesTotal()); |
| filesTotal.pushMetric(metricsRecord); |
| |
| blocksTotal.set((int)fsNameSystem.getBlocksTotal()); |
| blocksTotal.pushMetric(metricsRecord); |
| |
| capacityTotalGB.set(roundBytesToGBytes(fsNameSystem.getCapacityTotal())); |
| capacityTotalGB.pushMetric(metricsRecord); |
| |
| capacityUsedGB.set(roundBytesToGBytes(fsNameSystem.getCapacityUsed())); |
| capacityUsedGB.pushMetric(metricsRecord); |
| |
| capacityRemainingGB.set(roundBytesToGBytes(fsNameSystem. |
| getCapacityRemaining())); |
| capacityRemainingGB.pushMetric(metricsRecord); |
| |
| totalLoad.set(fsNameSystem.getTotalLoad()); |
| totalLoad.pushMetric(metricsRecord); |
| |
| pendingReplicationBlocks.set((int)fsNameSystem. |
| getPendingReplicationBlocks()); |
| pendingReplicationBlocks.pushMetric(metricsRecord); |
| |
| underReplicatedBlocks.set((int)fsNameSystem.getUnderReplicatedBlocks()); |
| underReplicatedBlocks.pushMetric(metricsRecord); |
| |
| scheduledReplicationBlocks.set((int)fsNameSystem. |
| getScheduledReplicationBlocks()); |
| scheduledReplicationBlocks.pushMetric(metricsRecord); |
| } |
| metricsRecord.update(); |
| } |
| } |