| /** |
| * 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.hdfs.server.datanode.metrics; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.metrics.MetricsContext; |
| import org.apache.hadoop.metrics.MetricsRecord; |
| import org.apache.hadoop.metrics.MetricsUtil; |
| import org.apache.hadoop.metrics.Updater; |
| import org.apache.hadoop.metrics.jvm.JvmMetrics; |
| import org.apache.hadoop.metrics.util.MetricsBase; |
| import org.apache.hadoop.metrics.util.MetricsRegistry; |
| import org.apache.hadoop.metrics.util.MetricsTimeVaryingInt; |
| import org.apache.hadoop.metrics.util.MetricsTimeVaryingLong; |
| import org.apache.hadoop.metrics.util.MetricsTimeVaryingRate; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| |
| |
| /** |
| * |
| * This class is for maintaining the various DataNode 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 #blocksRead}.inc() |
| * |
| */ |
| public class DataNodeMetrics implements Updater { |
| private final MetricsRecord metricsRecord; |
| private DataNodeActivityMBean datanodeActivityMBean; |
| public MetricsRegistry registry = new MetricsRegistry(); |
| |
| |
| public MetricsTimeVaryingLong bytesWritten = |
| new MetricsTimeVaryingLong("bytes_written", registry); |
| public MetricsTimeVaryingLong bytesRead = |
| new MetricsTimeVaryingLong("bytes_read", registry); |
| public MetricsTimeVaryingInt blocksWritten = |
| new MetricsTimeVaryingInt("blocks_written", registry); |
| public MetricsTimeVaryingInt blocksRead = |
| new MetricsTimeVaryingInt("blocks_read", registry); |
| public MetricsTimeVaryingInt blocksReplicated = |
| new MetricsTimeVaryingInt("blocks_replicated", registry); |
| public MetricsTimeVaryingInt blocksRemoved = |
| new MetricsTimeVaryingInt("blocks_removed", registry); |
| public MetricsTimeVaryingInt blocksVerified = |
| new MetricsTimeVaryingInt("blocks_verified", registry); |
| public MetricsTimeVaryingInt blockVerificationFailures = |
| new MetricsTimeVaryingInt("block_verification_failures", registry); |
| |
| public MetricsTimeVaryingInt readsFromLocalClient = |
| new MetricsTimeVaryingInt("reads_from_local_client", registry); |
| public MetricsTimeVaryingInt readsFromRemoteClient = |
| new MetricsTimeVaryingInt("reads_from_remote_client", registry); |
| public MetricsTimeVaryingInt writesFromLocalClient = |
| new MetricsTimeVaryingInt("writes_from_local_client", registry); |
| public MetricsTimeVaryingInt writesFromRemoteClient = |
| new MetricsTimeVaryingInt("writes_from_remote_client", registry); |
| |
| public MetricsTimeVaryingRate readBlockOp = |
| new MetricsTimeVaryingRate("readBlockOp", registry); |
| public MetricsTimeVaryingRate writeBlockOp = |
| new MetricsTimeVaryingRate("writeBlockOp", registry); |
| public MetricsTimeVaryingRate blockChecksumOp = |
| new MetricsTimeVaryingRate("blockChecksumOp", registry); |
| public MetricsTimeVaryingRate copyBlockOp = |
| new MetricsTimeVaryingRate("copyBlockOp", registry); |
| public MetricsTimeVaryingRate replaceBlockOp = |
| new MetricsTimeVaryingRate("replaceBlockOp", registry); |
| public MetricsTimeVaryingRate heartbeats = |
| new MetricsTimeVaryingRate("heartBeats", registry); |
| public MetricsTimeVaryingRate blockReports = |
| new MetricsTimeVaryingRate("blockReports", registry); |
| |
| |
| public DataNodeMetrics(Configuration conf, String datanodeName) { |
| String sessionId = conf.get(DFSConfigKeys.DFS_METRICS_SESSION_ID_KEY); |
| // Initiate reporting of Java VM metrics |
| JvmMetrics.init("DataNode", sessionId); |
| |
| |
| // Now the MBean for the data node |
| datanodeActivityMBean = new DataNodeActivityMBean(registry, datanodeName); |
| |
| // Create record for DataNode metrics |
| MetricsContext context = MetricsUtil.getContext("dfs"); |
| metricsRecord = MetricsUtil.createRecord(context, "datanode"); |
| metricsRecord.setTag("sessionId", sessionId); |
| context.registerUpdater(this); |
| } |
| |
| public void shutdown() { |
| if (datanodeActivityMBean != null) |
| datanodeActivityMBean.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) { |
| for (MetricsBase m : registry.getMetricsList()) { |
| m.pushMetric(metricsRecord); |
| } |
| } |
| metricsRecord.update(); |
| } |
| public void resetAllMinMax() { |
| readBlockOp.resetMinMax(); |
| writeBlockOp.resetMinMax(); |
| blockChecksumOp.resetMinMax(); |
| copyBlockOp.resetMinMax(); |
| replaceBlockOp.resetMinMax(); |
| heartbeats.resetMinMax(); |
| blockReports.resetMinMax(); |
| } |
| } |