/**
 * 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.
 */

/**
 * Disk Balancer Data Model is the Data Model for the cluster that
 * Disk Balancer is working against. This information is read
 * directly from NameNode or from a user supplied json model file.
 *
 * Here is the overview of the model maintained by diskBalancer.
 *
 * DiskBalancerCluster is a list of DiskBalancerDataNodes.
 * DiskBalancerDataNodes is a collection of DiskBalancerVolumeSets
 * DiskBalancerVolumeSets is a collection of DiskBalancerVolumes
 * DiskBalancerVolumes represents actual volumes on DataNodes.
 */
package org.apache.hadoop.hdfs.server.diskbalancer.datamodel;