| /** |
| * 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.conf.Configuration; |
| import org.apache.hadoop.yarn.api.records.ReservationDefinition; |
| import org.apache.hadoop.yarn.api.records.ReservationId; |
| import org.apache.hadoop.yarn.server.resourcemanager.reservation.Plan; |
| import org.apache.hadoop.yarn.server.resourcemanager.reservation.exceptions.PlanningException; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This Agent employs a simple greedy placement strategy, placing the various |
| * stages of a {@link ReservationDefinition} from the deadline moving backward |
| * towards the arrival. This allows jobs with earlier deadline to be scheduled |
| * greedily as well. Combined with an opportunistic anticipation of work if the |
| * cluster is not fully utilized also seems to provide good latency for |
| * best-effort jobs (i.e., jobs running without a reservation). |
| * |
| * This agent does not account for locality and only consider container |
| * granularity for validation purposes (i.e., you can't exceed max-container |
| * size). |
| */ |
| |
| public class GreedyReservationAgent implements ReservationAgent { |
| |
| // Log |
| private static final Logger LOG = LoggerFactory |
| .getLogger(GreedyReservationAgent.class); |
| |
| // Greedy planner |
| private ReservationAgent planner; |
| private boolean allocateLeft; |
| |
| public GreedyReservationAgent() { |
| } |
| |
| @Override |
| public void init(Configuration conf) { |
| allocateLeft = conf.getBoolean(FAVOR_EARLY_ALLOCATION, |
| DEFAULT_GREEDY_FAVOR_EARLY_ALLOCATION); |
| if (allocateLeft) { |
| LOG.info("Initializing the GreedyReservationAgent to favor \"early\"" |
| + " (left) allocations (controlled by parameter: " |
| + FAVOR_EARLY_ALLOCATION + ")"); |
| } else { |
| LOG.info("Initializing the GreedyReservationAgent to favor \"late\"" |
| + " (right) allocations (controlled by parameter: " |
| + FAVOR_EARLY_ALLOCATION + ")"); |
| } |
| |
| planner = |
| new IterativePlanner(new StageExecutionIntervalUnconstrained(), |
| new StageAllocatorGreedyRLE(allocateLeft), allocateLeft); |
| } |
| |
| public boolean isAllocateLeft(){ |
| return allocateLeft; |
| } |
| @Override |
| public boolean createReservation(ReservationId reservationId, String user, |
| Plan plan, ReservationDefinition contract) throws PlanningException { |
| |
| LOG.info("placing the following ReservationRequest: " + contract); |
| |
| try { |
| boolean res = |
| planner.createReservation(reservationId, user, plan, contract); |
| |
| if (res) { |
| LOG.info("OUTCOME: SUCCESS, Reservation ID: " |
| + reservationId.toString() + ", Contract: " + contract.toString()); |
| } else { |
| LOG.info("OUTCOME: FAILURE, Reservation ID: " |
| + reservationId.toString() + ", Contract: " + contract.toString()); |
| } |
| return res; |
| } catch (PlanningException e) { |
| LOG.info("OUTCOME: FAILURE, Reservation ID: " + reservationId.toString() |
| + ", Contract: " + contract.toString()); |
| throw e; |
| } |
| |
| } |
| |
| @Override |
| public boolean updateReservation(ReservationId reservationId, String user, |
| Plan plan, ReservationDefinition contract) throws PlanningException { |
| |
| LOG.info("updating the following ReservationRequest: " + contract); |
| |
| return planner.updateReservation(reservationId, user, plan, contract); |
| |
| } |
| |
| @Override |
| public boolean deleteReservation(ReservationId reservationId, String user, |
| Plan plan) throws PlanningException { |
| |
| LOG.info("removing the following ReservationId: " + reservationId); |
| |
| return planner.deleteReservation(reservationId, user, plan); |
| |
| } |
| |
| } |