MRConstants.java
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上传日期:2018-01-08
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- /**
- * 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.mapred;
- /*******************************
- * Some handy constants
- *
- *******************************/
- interface MRConstants {
- //
- // Timeouts, constants
- //
- public static final int HEARTBEAT_INTERVAL_MIN = 3 * 1000;
-
- public static final int CLUSTER_INCREMENT = 100;
- public static final long COUNTER_UPDATE_INTERVAL = 60 * 1000;
- //
- // Result codes
- //
- public static int SUCCESS = 0;
- public static int FILE_NOT_FOUND = -1;
-
- /**
- * The custom http header used for the map output length.
- */
- public static final String MAP_OUTPUT_LENGTH = "Map-Output-Length";
- /**
- * The custom http header used for the "raw" map output length.
- */
- public static final String RAW_MAP_OUTPUT_LENGTH = "Raw-Map-Output-Length";
- public static final String WORKDIR = "work";
- }