TestFSSchedulerApp.java example

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hadoop-on-lustre2-master
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 * distributed with this work for additional information
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 * 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,
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 * See the License for the specific language governing permissions and
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package org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair;

import static org.junit.Assert.assertEquals;

import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.Priority;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.NodeType;
import org.apache.hadoop.yarn.util.Clock;
import org.junit.Test;
import org.mockito.Mockito;

public class TestFSSchedulerApp {

  private class MockClock implements Clock {
    private long time = 0;
    @Override
    public long getTime() {
      return time;
    }

    public void tick(int seconds) {
      time = time + seconds * 1000;
    }

  }

  private ApplicationAttemptId createAppAttemptId(int appId, int attemptId) {
    ApplicationId appIdImpl = ApplicationId.newInstance(0, appId);
    ApplicationAttemptId attId =
        ApplicationAttemptId.newInstance(appIdImpl, attemptId);
    return attId;
  }

  @Test
  public void testDelayScheduling() {
    FSLeafQueue queue = Mockito.mock(FSLeafQueue.class);
    Priority prio = Mockito.mock(Priority.class);
    Mockito.when(prio.getPriority()).thenReturn(1);
    double nodeLocalityThreshold = .5;
    double rackLocalityThreshold = .6;

    ApplicationAttemptId applicationAttemptId = createAppAttemptId(1, 1);
    FSSchedulerApp schedulerApp =
        new FSSchedulerApp(applicationAttemptId, "user1", queue , null, null);

    // Default level should be node-local
    assertEquals(NodeType.NODE_LOCAL, schedulerApp.getAllowedLocalityLevel(
        prio, 10, nodeLocalityThreshold, rackLocalityThreshold));

    // First five scheduling opportunities should remain node local
    for (int i = 0; i < 5; i++) {
      schedulerApp.addSchedulingOpportunity(prio);
      assertEquals(NodeType.NODE_LOCAL, schedulerApp.getAllowedLocalityLevel(
          prio, 10, nodeLocalityThreshold, rackLocalityThreshold));
    }

    // After five it should switch to rack local
    schedulerApp.addSchedulingOpportunity(prio);
    assertEquals(NodeType.RACK_LOCAL, schedulerApp.getAllowedLocalityLevel(
        prio, 10, nodeLocalityThreshold, rackLocalityThreshold));

    // Manually set back to node local
    schedulerApp.resetAllowedLocalityLevel(prio, NodeType.NODE_LOCAL);
    schedulerApp.resetSchedulingOpportunities(prio);
    assertEquals(NodeType.NODE_LOCAL, schedulerApp.getAllowedLocalityLevel(
        prio, 10, nodeLocalityThreshold, rackLocalityThreshold));

    // Now escalate again to rack-local, then to off-switch
    for (int i = 0; i < 5; i++) {
      schedulerApp.addSchedulingOpportunity(prio);
      assertEquals(NodeType.NODE_LOCAL, schedulerApp.getAllowedLocalityLevel(
          prio, 10, nodeLocalityThreshold, rackLocalityThreshold));
    }

    schedulerApp.addSchedulingOpportunity(prio);
    assertEquals(NodeType.RACK_LOCAL, schedulerApp.getAllowedLocalityLevel(
        prio, 10, nodeLocalityThreshold, rackLocalityThreshold));

    for (int i = 0; i < 6; i++) {
      schedulerApp.addSchedulingOpportunity(prio);
      assertEquals(NodeType.RACK_LOCAL, schedulerApp.getAllowedLocalityLevel(
          prio, 10, nodeLocalityThreshold, rackLocalityThreshold));
    }

    schedulerApp.addSchedulingOpportunity(prio);
    assertEquals(NodeType.OFF_SWITCH, schedulerApp.getAllowedLocalityLevel(
        prio, 10, nodeLocalityThreshold, rackLocalityThreshold));
  }

  @Test
  public void testDelaySchedulingForContinuousScheduling()
          throws InterruptedException {
    FSLeafQueue queue = Mockito.mock(FSLeafQueue.class);
    Priority prio = Mockito.mock(Priority.class);
    Mockito.when(prio.getPriority()).thenReturn(1);

    MockClock clock = new MockClock();

    long nodeLocalityDelayMs = 5 * 1000L;    // 5 seconds
    long rackLocalityDelayMs = 6 * 1000L;    // 6 seconds

    ApplicationAttemptId applicationAttemptId = createAppAttemptId(1, 1);
    FSSchedulerApp schedulerApp =
            new FSSchedulerApp(applicationAttemptId, "user1", queue,
                    null, null);
    AppSchedulable appSchedulable = Mockito.mock(AppSchedulable.class);
    long startTime = clock.getTime();
    Mockito.when(appSchedulable.getStartTime()).thenReturn(startTime);
    schedulerApp.setAppSchedulable(appSchedulable);

    // Default level should be node-local
    assertEquals(NodeType.NODE_LOCAL,
            schedulerApp.getAllowedLocalityLevelByTime(prio,
                    nodeLocalityDelayMs, rackLocalityDelayMs, clock.getTime()));

    // after 4 seconds should remain node local
    clock.tick(4);
    assertEquals(NodeType.NODE_LOCAL,
            schedulerApp.getAllowedLocalityLevelByTime(prio,
                    nodeLocalityDelayMs, rackLocalityDelayMs, clock.getTime()));

    // after 6 seconds should switch to rack local
    clock.tick(2);
    assertEquals(NodeType.RACK_LOCAL,
            schedulerApp.getAllowedLocalityLevelByTime(prio,
                    nodeLocalityDelayMs, rackLocalityDelayMs, clock.getTime()));

    // manually set back to node local
    schedulerApp.resetAllowedLocalityLevel(prio, NodeType.NODE_LOCAL);
    schedulerApp.resetSchedulingOpportunities(prio, clock.getTime());
    assertEquals(NodeType.NODE_LOCAL,
            schedulerApp.getAllowedLocalityLevelByTime(prio,
                    nodeLocalityDelayMs, rackLocalityDelayMs, clock.getTime()));

    // Now escalate again to rack-local, then to off-switch
    clock.tick(6);
    assertEquals(NodeType.RACK_LOCAL,
            schedulerApp.getAllowedLocalityLevelByTime(prio,
                    nodeLocalityDelayMs, rackLocalityDelayMs, clock.getTime()));

    clock.tick(7);
    assertEquals(NodeType.OFF_SWITCH,
            schedulerApp.getAllowedLocalityLevelByTime(prio,
                    nodeLocalityDelayMs, rackLocalityDelayMs, clock.getTime()));
  }

  @Test
  /**
   * Ensure that when negative paramaters are given (signaling delay scheduling
   * no tin use), the least restrictive locality level is returned.
   */
  public void testLocalityLevelWithoutDelays() {
    FSLeafQueue queue = Mockito.mock(FSLeafQueue.class);
    Priority prio = Mockito.mock(Priority.class);
    Mockito.when(prio.getPriority()).thenReturn(1);

    ApplicationAttemptId applicationAttemptId = createAppAttemptId(1, 1);
    FSSchedulerApp schedulerApp =
        new FSSchedulerApp(applicationAttemptId, "user1", queue , null, null);
    assertEquals(NodeType.OFF_SWITCH, schedulerApp.getAllowedLocalityLevel(
        prio, 10, -1.0, -1.0));
  }
}