| /** |
| * 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.examples.terasort; |
| |
| import org.apache.hadoop.classification.InterfaceAudience.Private; |
| import org.apache.hadoop.classification.InterfaceStability.Unstable; |
| |
| /** |
| * <p> |
| * TeraSort configurations. |
| * </p> |
| */ |
| @Private |
| @Unstable |
| public enum TeraSortConfigKeys { |
| |
| NUM_ROWS("mapreduce.terasort.num-rows", |
| "Number of rows to generate during teragen."), |
| |
| NUM_PARTITIONS("mapreduce.terasort.num.partitions", |
| "Number of partitions used for sampling."), |
| |
| SAMPLE_SIZE("mapreduce.terasort.partitions.sample", |
| "Sample size for each partition."), |
| |
| FINAL_SYNC_ATTRIBUTE("mapreduce.terasort.final.sync", |
| "Perform a disk-persisting hsync at end of every file-write."), |
| |
| USE_TERA_SCHEDULER("mapreduce.terasort.use.terascheduler", |
| "Use TeraScheduler for computing input split distribution."), |
| |
| USE_SIMPLE_PARTITIONER("mapreduce.terasort.simplepartitioner", |
| "Use SimplePartitioner instead of TotalOrderPartitioner."), |
| |
| OUTPUT_REPLICATION("mapreduce.terasort.output.replication", |
| "Replication factor to use for output data files."); |
| |
| private String confName; |
| private String description; |
| |
| TeraSortConfigKeys(String configName, String description) { |
| this.confName = configName; |
| this.description = description; |
| } |
| |
| public String key() { |
| return this.confName; |
| } |
| |
| public String toString() { |
| return "<" + confName + "> " + description; |
| } |
| |
| public static final long DEFAULT_NUM_ROWS = 0L; |
| public static final int DEFAULT_NUM_PARTITIONS = 10; |
| public static final long DEFAULT_SAMPLE_SIZE = 100000L; |
| public static final boolean DEFAULT_FINAL_SYNC_ATTRIBUTE = true; |
| public static final boolean DEFAULT_USE_TERA_SCHEDULER = true; |
| public static final boolean DEFAULT_USE_SIMPLE_PARTITIONER = false; |
| public static final int DEFAULT_OUTPUT_REPLICATION = 1; |
| } |