001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hdfs.server.namenode.metrics;
019
020import org.apache.hadoop.conf.Configuration;
021import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.NamenodeRole;
022import org.apache.hadoop.hdfs.DFSConfigKeys;
023import org.apache.hadoop.metrics2.MetricsSystem;
024import org.apache.hadoop.metrics2.annotation.Metric;
025import org.apache.hadoop.metrics2.annotation.Metrics;
026import static org.apache.hadoop.metrics2.impl.MsInfo.*;
027import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
028import org.apache.hadoop.metrics2.lib.MetricsRegistry;
029import org.apache.hadoop.metrics2.lib.MutableCounterLong;
030import org.apache.hadoop.metrics2.lib.MutableGaugeInt;
031import org.apache.hadoop.metrics2.lib.MutableRate;
032import org.apache.hadoop.metrics2.source.JvmMetrics;
033
034/**
035 * This class is for maintaining  the various NameNode activity statistics
036 * and publishing them through the metrics interfaces.
037 */
038@Metrics(name="NameNodeActivity", about="NameNode metrics", context="dfs")
039public class NameNodeMetrics {
040  final MetricsRegistry registry = new MetricsRegistry("namenode");
041
042  @Metric MutableCounterLong createFileOps;
043  @Metric MutableCounterLong filesCreated;
044  @Metric MutableCounterLong filesAppended;
045  @Metric MutableCounterLong getBlockLocations;
046  @Metric MutableCounterLong filesRenamed;
047  @Metric MutableCounterLong getListingOps;
048  @Metric MutableCounterLong deleteFileOps;
049  @Metric("Number of files/dirs deleted by delete or rename operations")
050  MutableCounterLong filesDeleted;
051  @Metric MutableCounterLong fileInfoOps;
052  @Metric MutableCounterLong addBlockOps;
053  @Metric MutableCounterLong getAdditionalDatanodeOps;
054  @Metric MutableCounterLong createSymlinkOps;
055  @Metric MutableCounterLong getLinkTargetOps;
056  @Metric MutableCounterLong filesInGetListingOps;
057
058  @Metric("Journal transactions") MutableRate transactions;
059  @Metric("Journal syncs") MutableRate syncs;
060  @Metric("Journal transactions batched in sync")
061  MutableCounterLong transactionsBatchedInSync;
062  @Metric("Block report") MutableRate blockReport;
063
064  @Metric("Duration in SafeMode at startup") MutableGaugeInt safeModeTime;
065  @Metric("Time loading FS Image at startup") MutableGaugeInt fsImageLoadTime;
066
067  NameNodeMetrics(String processName, String sessionId) {
068    registry.tag(ProcessName, processName).tag(SessionId, sessionId);
069  }
070
071  public static NameNodeMetrics create(Configuration conf, NamenodeRole r) {
072    String sessionId = conf.get(DFSConfigKeys.DFS_METRICS_SESSION_ID_KEY);
073    String processName = r.toString();
074    MetricsSystem ms = DefaultMetricsSystem.instance();
075    JvmMetrics.create(processName, sessionId, ms);
076    return ms.register(new NameNodeMetrics(processName, sessionId));
077  }
078
079  public void shutdown() {
080    DefaultMetricsSystem.shutdown();
081  }
082
083  public void incrGetBlockLocations() {
084    getBlockLocations.incr();
085  }
086
087  public void incrFilesCreated() {
088    filesCreated.incr();
089  }
090
091  public void incrCreateFileOps() {
092    createFileOps.incr();
093  }
094
095  public void incrFilesAppended() {
096    filesAppended.incr();
097  }
098
099  public void incrAddBlockOps() {
100    addBlockOps.incr();
101  }
102  
103  public void incrGetAdditionalDatanodeOps() {
104    getAdditionalDatanodeOps.incr();
105  }
106
107  public void incrFilesRenamed() {
108    filesRenamed.incr();
109  }
110
111  public void incrFilesDeleted(int delta) {
112    filesDeleted.incr(delta);
113  }
114
115  public void incrDeleteFileOps() {
116    deleteFileOps.incr();
117  }
118
119  public void incrGetListingOps() {
120    getListingOps.incr();
121  }
122
123  public void incrFilesInGetListingOps(int delta) {
124    filesInGetListingOps.incr(delta);
125  }
126
127  public void incrFileInfoOps() {
128    fileInfoOps.incr();
129  }
130
131  public void incrCreateSymlinkOps() {
132    createSymlinkOps.incr();
133  }
134
135  public void incrGetLinkTargetOps() {
136    getLinkTargetOps.incr();
137  }
138
139  public void addTransaction(long latency) {
140    transactions.add(latency);
141  }
142
143  public void incrTransactionsBatchedInSync() {
144    transactionsBatchedInSync.incr();
145  }
146
147  public void addSync(long elapsed) {
148    syncs.add(elapsed);
149  }
150
151  public void setFsImageLoadTime(long elapsed) {
152    fsImageLoadTime.set((int) elapsed);
153  }
154
155  public void addBlockReport(long latency) {
156    blockReport.add(latency);
157  }
158
159  public void setSafeModeTime(long elapsed) {
160    safeModeTime.set((int) elapsed);
161  }
162}