hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/container/balancer/ContainerBalancerMetrics.java

/*
 * 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.hdds.scm.container.balancer;

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.MutableCounterLong;

/**
 * Metrics related to Container Balancer running in SCM.
 */
@Metrics(name = "ContainerBalancer Metrics", about = "Metrics related to " +
    "Container Balancer running in SCM", context = "SCM")
public final class ContainerBalancerMetrics {
  public static final String NAME =
      ContainerBalancerMetrics.class.getSimpleName();

  private final MetricsSystem ms;

  @Metric(about = "Amount of Gigabytes that Container Balancer moved" +
      " in the latest iteration.")
  private MutableCounterLong dataSizeMovedGBInLatestIteration;

  @Metric(about = "Number of container moves performed by Container Balancer " +
      "in the latest iteration.")
  private MutableCounterLong numContainerMovesInLatestIteration;

  @Metric(about = "Number of iterations that Container Balancer has run for.")
  private MutableCounterLong numIterations;

  @Metric(about = "Number of datanodes that were involved in balancing in the" +
      " latest iteration.")
  private MutableCounterLong numDatanodesInvolvedInLatestIteration;

  @Metric(about = "Amount of data in Gigabytes that is causing unbalance.")
  private MutableCounterLong dataSizeUnbalancedGB;

  @Metric(about = "Number of unbalanced datanodes.")
  private MutableCounterLong numDatanodesUnbalanced;

  @Metric(about = "Total number of container moves across all iterations of " +
      "Container Balancer.")
  private MutableCounterLong numContainerMoves;

  @Metric(about = "Total data size in GB moved across all iterations of " +
      "Container Balancer.")
  private MutableCounterLong dataSizeMovedGB;

  /**
   * Create and register metrics named {@link ContainerBalancerMetrics#NAME}
   * for {@link ContainerBalancer}.
   *
   * @return {@link ContainerBalancerMetrics}
   */
  public static ContainerBalancerMetrics create() {
    MetricsSystem ms = DefaultMetricsSystem.instance();
    return ms.register(NAME, "Container Balancer Metrics",
        new ContainerBalancerMetrics(ms));
  }

  private ContainerBalancerMetrics(MetricsSystem ms) {
    this.ms = ms;
  }

  /**
   * Gets the amount of data moved by Container Balancer in the latest
   * iteration.
   * @return size in GB
   */
  public long getDataSizeMovedGBInLatestIteration() {
    return dataSizeMovedGBInLatestIteration.value();
  }

  public void incrementDataSizeMovedGBInLatestIteration(long valueToAdd) {
    this.dataSizeMovedGBInLatestIteration.incr(valueToAdd);
  }

  public void resetDataSizeMovedGBInLatestIteration() {
    dataSizeMovedGBInLatestIteration.incr(
        -getDataSizeMovedGBInLatestIteration());
  }

  /**
   * Gets the number of container moves performed by Container Balancer in the
   * latest iteration.
   * @return number of container moves
   */
  public long getNumContainerMovesInLatestIteration() {
    return numContainerMovesInLatestIteration.value();
  }

  public void incrementNumContainerMovesInLatestIteration(long valueToAdd) {
    this.numContainerMovesInLatestIteration.incr(valueToAdd);
  }

  public void resetNumContainerMovesInLatestIteration() {
    numContainerMovesInLatestIteration.incr(
        -getNumContainerMovesInLatestIteration());
  }

  /**
   * Gets the number of iterations that Container Balancer has run for.
   * @return number of iterations
   */
  public long getNumIterations() {
    return numIterations.value();
  }

  public void incrementNumIterations(long valueToAdd) {
    numIterations.incr(valueToAdd);
  }

  /**
   * Gets number of datanodes that were involved in balancing in the latest
   * iteration.
   * @return number of datanodes
   */
  public long getNumDatanodesInvolvedInLatestIteration() {
    return numDatanodesInvolvedInLatestIteration.value();
  }

  public void incrementNumDatanodesInvolvedInLatestIteration(long valueToAdd) {
    numDatanodesInvolvedInLatestIteration.incr(valueToAdd);
  }

  public void resetNumDatanodesInvolvedInLatestIteration() {
    numDatanodesInvolvedInLatestIteration.incr(
        -getNumDatanodesInvolvedInLatestIteration());
  }

  /**
   * Gets the amount of data in Gigabytes that is causing unbalance.
   * @return size of data as a long value
   */
  public long getDataSizeUnbalancedGB() {
    return dataSizeUnbalancedGB.value();
  }

  public void incrementDataSizeUnbalancedGB(long valueToAdd) {
    dataSizeUnbalancedGB.incr(valueToAdd);
  }

  public void resetDataSizeUnbalancedGB() {
    dataSizeUnbalancedGB.incr(-getDataSizeUnbalancedGB());
  }

  /**
   * Gets the number of datanodes that are unbalanced.
   * @return long value
   */
  public long getNumDatanodesUnbalanced() {
    return numDatanodesUnbalanced.value();
  }

  public void incrementNumDatanodesUnbalanced(long valueToAdd) {
    numDatanodesUnbalanced.incr(valueToAdd);
  }

  public void resetNumDatanodesUnbalanced() {
    numDatanodesUnbalanced.incr(-getNumDatanodesUnbalanced());
  }

  public long getNumContainerMoves() {
    return numContainerMoves.value();
  }

  public void incrementNumContainerMoves(long valueToAdd) {
    numContainerMoves.incr(valueToAdd);
  }

  public long getDataSizeMovedGB() {
    return dataSizeMovedGB.value();
  }

  public void incrementDataSizeMovedGB(long valueToAdd) {
    dataSizeMovedGB.incr(valueToAdd);
  }
}