hadoop StageExecutionInterval 源码
haddop StageExecutionInterval 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/reservation/planning/StageExecutionInterval.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.yarn.server.resourcemanager.reservation.planning;
import org.apache.hadoop.yarn.api.records.ReservationDefinition;
import org.apache.hadoop.yarn.api.records.ReservationRequest;
import org.apache.hadoop.yarn.server.resourcemanager.reservation.Plan;
import org.apache.hadoop.yarn.server.resourcemanager.reservation.RLESparseResourceAllocation;
import org.apache.hadoop.yarn.server.resourcemanager.reservation.ReservationInterval;
/**
* An auxiliary class used to compute the time interval in which the stage can
* be allocated resources by {@link IterativePlanner}.
*/
public interface StageExecutionInterval {
/**
* Computes the earliest allowed starting time for a given stage.
*
* @param plan the Plan to which the reservation must be fitted
* @param reservation the job contract
* @param currentReservationStage the stage
* @param allocateLeft is the job allocated from left to right
* @param allocations Existing resource assignments for the job
* @return the time interval in which the stage can get resources.
*/
ReservationInterval computeExecutionInterval(Plan plan,
ReservationDefinition reservation,
ReservationRequest currentReservationStage, boolean allocateLeft,
RLESparseResourceAllocation allocations);
}
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