hadoop-ozone/upgrade/src/main/java/org/apache/hadoop/ozone/upgrade/Balance.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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.ozone.upgrade;

import java.util.concurrent.Callable;

import picocli.CommandLine.Command;

/**
 * Command to move blocks between HDFS datanodes.
 */
@Command(name = "balance",
    description = "Move the HDFS blocks for a better distribution "
        + "usage.")
public class Balance implements Callable<Void> {

  @Override
  public Void call() throws Exception {
    System.err.println("[In-Place upgrade : balance] is not yet supported.");
    return null;
  }

}