hadoop FedBalanceConfigs 源码

  • 2022-10-20
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haddop FedBalanceConfigs 代码

文件路径:/hadoop-tools/hadoop-federation-balance/src/main/java/org/apache/hadoop/tools/fedbalance/FedBalanceConfigs.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.tools.fedbalance;

import org.apache.hadoop.classification.InterfaceAudience;

/**
 * Federation balance configuration properties.
 */
@InterfaceAudience.Private
public final class FedBalanceConfigs {

  public static final String LAST_SNAPSHOT_NAME = "DISTCP-BALANCE-CURRENT";
  public static final String CURRENT_SNAPSHOT_NAME = "DISTCP-BALANCE-NEXT";
  /* Specify the behaviour of trash. */
  public enum TrashOption {
    TRASH, DELETE, SKIP
  }

  /* The worker threads number of the BalanceProcedureScheduler.
   BalanceProcedureScheduler is responsible for scheduling a balance job,
   including submit, run, delay and recover. */
  public static final String WORK_THREAD_NUM =
      "hdfs.fedbalance.procedure.work.thread.num";
  public static final int WORK_THREAD_NUM_DEFAULT = 10;
  /* The uri of the journal, the journal file is used for handling the job
   persistence and recover. */
  public static final String SCHEDULER_JOURNAL_URI =
      "hdfs.fedbalance.procedure.scheduler.journal.uri";
  public static final String JOB_PREFIX = "JOB-";
  public static final String TMP_TAIL = ".tmp";

  private FedBalanceConfigs(){}
}

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