| /** |
| * 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.fsdataset; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.metrics2.MetricsSystem; |
| import org.apache.hadoop.metrics2.annotation.Metric; |
| import org.apache.hadoop.metrics2.annotation.Metrics; |
| import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem; |
| import org.apache.hadoop.metrics2.lib.MetricsRegistry; |
| import org.apache.hadoop.metrics2.lib.MutableCounterLong; |
| import org.apache.hadoop.metrics2.lib.MutableQuantiles; |
| import org.apache.hadoop.metrics2.lib.MutableRate; |
| |
| import java.util.concurrent.ThreadLocalRandom; |
| |
| /** |
| * This class is for maintaining Datanode Volume IO related statistics and |
| * publishing them through the metrics interfaces. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| @Metrics(name = "DataNodeVolume", about = "DataNode Volume metrics", |
| context = "dfs") |
| public class DataNodeVolumeMetrics { |
| private final MetricsRegistry registry = new MetricsRegistry("FsVolume"); |
| |
| @Metric("number of metadata operations") |
| private MutableCounterLong totalMetadataOperations; |
| @Metric("metadata operation rate") |
| private MutableRate metadataOperationRate; |
| private MutableQuantiles[] metadataOperationLatencyQuantiles; |
| |
| @Metric("number of data file io operations") |
| private MutableCounterLong totalDataFileIos; |
| @Metric("data file io operation rate") |
| private MutableRate dataFileIoRate; |
| private MutableQuantiles[] dataFileIoLatencyQuantiles; |
| |
| @Metric("file io flush rate") |
| private MutableRate flushIoRate; |
| private MutableQuantiles[] flushIoLatencyQuantiles; |
| |
| @Metric("file io sync rate") |
| private MutableRate syncIoRate; |
| private MutableQuantiles[] syncIoLatencyQuantiles; |
| |
| @Metric("file io read rate") |
| private MutableRate readIoRate; |
| private MutableQuantiles[] readIoLatencyQuantiles; |
| |
| @Metric("file io write rate") |
| private MutableRate writeIoRate; |
| private MutableQuantiles[] writeIoLatencyQuantiles; |
| |
| @Metric("number of file io errors") |
| private MutableCounterLong totalFileIoErrors; |
| @Metric("file io error rate") |
| private MutableRate fileIoErrorRate; |
| |
| public long getTotalMetadataOperations() { |
| return totalMetadataOperations.value(); |
| } |
| |
| // Based on metadataOperationRate |
| public long getMetadataOperationSampleCount() { |
| return metadataOperationRate.lastStat().numSamples(); |
| } |
| |
| public double getMetadataOperationMean() { |
| return metadataOperationRate.lastStat().mean(); |
| } |
| |
| public double getMetadataOperationStdDev() { |
| return metadataOperationRate.lastStat().stddev(); |
| } |
| |
| public long getTotalDataFileIos() { |
| return totalDataFileIos.value(); |
| } |
| |
| // Based on dataFileIoRate |
| public long getDataFileIoSampleCount() { |
| return dataFileIoRate.lastStat().numSamples(); |
| } |
| |
| public double getDataFileIoMean() { |
| return dataFileIoRate.lastStat().mean(); |
| } |
| |
| public double getDataFileIoStdDev() { |
| return dataFileIoRate.lastStat().stddev(); |
| } |
| |
| // Based on flushIoRate |
| public long getFlushIoSampleCount() { |
| return flushIoRate.lastStat().numSamples(); |
| } |
| |
| public double getFlushIoMean() { |
| return flushIoRate.lastStat().mean(); |
| } |
| |
| public double getFlushIoStdDev() { |
| return flushIoRate.lastStat().stddev(); |
| } |
| |
| // Based on syncIoRate |
| public long getSyncIoSampleCount() { |
| return syncIoRate.lastStat().numSamples(); |
| } |
| |
| public double getSyncIoMean() { |
| return syncIoRate.lastStat().mean(); |
| } |
| |
| public double getSyncIoStdDev() { |
| return syncIoRate.lastStat().stddev(); |
| } |
| |
| // Based on readIoRate |
| public long getReadIoSampleCount() { |
| return readIoRate.lastStat().numSamples(); |
| } |
| |
| public double getReadIoMean() { |
| return readIoRate.lastStat().mean(); |
| } |
| |
| public double getReadIoStdDev() { |
| return readIoRate.lastStat().stddev(); |
| } |
| |
| // Based on writeIoRate |
| public long getWriteIoSampleCount() { |
| return syncIoRate.lastStat().numSamples(); |
| } |
| |
| public double getWriteIoMean() { |
| return syncIoRate.lastStat().mean(); |
| } |
| |
| public double getWriteIoStdDev() { |
| return syncIoRate.lastStat().stddev(); |
| } |
| |
| public long getTotalFileIoErrors() { |
| return totalFileIoErrors.value(); |
| } |
| |
| // Based on fileIoErrorRate |
| public long getFileIoErrorSampleCount() { |
| return fileIoErrorRate.lastStat().numSamples(); |
| } |
| |
| public double getFileIoErrorMean() { |
| return fileIoErrorRate.lastStat().mean(); |
| } |
| |
| public double getFileIoErrorStdDev() { |
| return fileIoErrorRate.lastStat().stddev(); |
| } |
| |
| private final String name; |
| private final MetricsSystem ms; |
| |
| public DataNodeVolumeMetrics(final MetricsSystem metricsSystem, |
| final String volumeName, final int[] intervals) { |
| this.ms = metricsSystem; |
| this.name = volumeName; |
| final int len = intervals.length; |
| metadataOperationLatencyQuantiles = new MutableQuantiles[len]; |
| dataFileIoLatencyQuantiles = new MutableQuantiles[len]; |
| flushIoLatencyQuantiles = new MutableQuantiles[len]; |
| syncIoLatencyQuantiles = new MutableQuantiles[len]; |
| readIoLatencyQuantiles = new MutableQuantiles[len]; |
| writeIoLatencyQuantiles = new MutableQuantiles[len]; |
| for (int i = 0; i < len; i++) { |
| int interval = intervals[i]; |
| metadataOperationLatencyQuantiles[i] = registry.newQuantiles( |
| "metadataOperationLatency" + interval + "s", |
| "Meatadata Operation Latency in ms", "ops", "latency", interval); |
| dataFileIoLatencyQuantiles[i] = registry.newQuantiles( |
| "dataFileIoLatency" + interval + "s", |
| "Data File Io Latency in ms", "ops", "latency", interval); |
| flushIoLatencyQuantiles[i] = registry.newQuantiles( |
| "flushIoLatency" + interval + "s", |
| "Data flush Io Latency in ms", "ops", "latency", interval); |
| syncIoLatencyQuantiles[i] = registry.newQuantiles( |
| "syncIoLatency" + interval + "s", |
| "Data sync Io Latency in ms", "ops", "latency", interval); |
| readIoLatencyQuantiles[i] = registry.newQuantiles( |
| "readIoLatency" + interval + "s", |
| "Data read Io Latency in ms", "ops", "latency", interval); |
| writeIoLatencyQuantiles[i] = registry.newQuantiles( |
| "writeIoLatency" + interval + "s", |
| "Data write Io Latency in ms", "ops", "latency", interval); |
| } |
| } |
| |
| public static DataNodeVolumeMetrics create(final Configuration conf, |
| final String volumeName) { |
| MetricsSystem ms = DefaultMetricsSystem.instance(); |
| String name = "DataNodeVolume-"+ (volumeName.isEmpty() |
| ? "UndefinedDataNodeVolume"+ ThreadLocalRandom.current().nextInt() |
| : volumeName.replace(':', '-')); |
| |
| // Percentile measurement is off by default, by watching no intervals |
| int[] intervals = |
| conf.getInts(DFSConfigKeys.DFS_METRICS_PERCENTILES_INTERVALS_KEY); |
| return ms.register(name, null, new DataNodeVolumeMetrics(ms, name, |
| intervals)); |
| } |
| |
| public String name() { |
| return name; |
| } |
| |
| public void unRegister() { |
| ms.unregisterSource(name); |
| } |
| |
| public void addMetadastaOperationLatency(final long latency) { |
| totalMetadataOperations.incr(); |
| metadataOperationRate.add(latency); |
| for (MutableQuantiles q : metadataOperationLatencyQuantiles) { |
| q.add(latency); |
| } |
| } |
| |
| public void addDataFileIoLatency(final long latency) { |
| totalDataFileIos.incr(); |
| dataFileIoRate.add(latency); |
| for (MutableQuantiles q : dataFileIoLatencyQuantiles) { |
| q.add(latency); |
| } |
| } |
| |
| public void addSyncIoLatency(final long latency) { |
| syncIoRate.add(latency); |
| for (MutableQuantiles q : syncIoLatencyQuantiles) { |
| q.add(latency); |
| } |
| } |
| |
| public void addFlushIoLatency(final long latency) { |
| flushIoRate.add(latency); |
| for (MutableQuantiles q : flushIoLatencyQuantiles) { |
| q.add(latency); |
| } |
| } |
| |
| public void addReadIoLatency(final long latency) { |
| readIoRate.add(latency); |
| for (MutableQuantiles q : readIoLatencyQuantiles) { |
| q.add(latency); |
| } |
| } |
| |
| public void addWriteIoLatency(final long latency) { |
| writeIoRate.add(latency); |
| for (MutableQuantiles q: writeIoLatencyQuantiles) { |
| q.add(latency); |
| } |
| } |
| |
| public void addFileIoError(final long latency) { |
| totalFileIoErrors.incr(); |
| metadataOperationRate.add(latency); |
| } |
| } |