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/**
 * Copyright (C) 2014 Dasasian ([email protected])
 *
 * Licensed 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 com.dasasian.chok.util;

/**
 * Contains hadoop configuration keys used in
 * hadoop-default.xml/hadoop-site.xml.
 */
public interface IHadoopConstants {

    String NAMENODE = "fs.default.name";
    String JOBTRACKER = "mapred.job.tracker";

    String TMP_DIR = "hadoop.tmp.dir";

    String NATIVE_LIB = "hadoop.native.lib";

    String NUMBER_OF_MAP_TASKS_PER_JOB = "mapred.map.tasks";
    String NUMBER_OF_REDUCE_TASKS_PER_JOB = "mapred.reduce.tasks";
    String NUMBER_OF_MAP_TASKS_PER_TASKTRACKER = "mapred.tasktracker.map.tasks.maximum";
    String NUMBER_OF_REDUCE_TASKS_PER_TASKTRACKER = "mapred.tasktracker.reduce.tasks.maximum";
    String CHILD_JVM_OPTS = "mapred.child.java.opts";

    String MAPRED_LOCAL_DIR = "mapred.local.dir";
    String MAPRED_SYSTEM_DIR = "mapred.system.dir";
    String MAPRED_TEMP_DIR = "mapred.temp.dir";

    String IO_FILE_BUFFER_SIZE = "io.file.buffer.size";
    String IO_SORT_MB = "io.sort.mb";
}