001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.mapreduce;
019
020import org.apache.hadoop.classification.InterfaceAudience;
021import org.apache.hadoop.classification.InterfaceStability;
022
023/**
024 * Used to describe the priority of the running job. 
025 * DEFAULT : While submitting a job, if the user is not specifying priority,
026 * YARN has the capability to pick the default priority as per its config.
027 * Hence MapReduce can indicate such cases with this new enum.
028 * UNDEFINED_PRIORITY : YARN supports priority as an integer. Hence other than
029 * the five defined enums, YARN can consider other integers also. To generalize
030 * such cases, this specific enum is used.
031 */
032@InterfaceAudience.Public
033@InterfaceStability.Evolving
034public enum JobPriority {
035  VERY_HIGH,
036  HIGH,
037  NORMAL,
038  LOW,
039  VERY_LOW,
040  DEFAULT,
041  UNDEFINED_PRIORITY;
042}