Examples with GreedyPlanner org.apache.hadoop.hdfs.server.diskbalancer.planner.GreedyPlanner used on opensource projects

Example 1 with GreedyPlanner

use of org.apache.hadoop.hdfs.server.diskbalancer.planner.GreedyPlanner in project hadoop by apache.

the class TestPlanner method testGreedyPlannerEqualDisksNoMoves.

@Test
public void testGreedyPlannerEqualDisksNoMoves() throws Exception {
    NullConnector nullConnector = new NullConnector();
    DiskBalancerCluster cluster = new DiskBalancerCluster(nullConnector);
    DiskBalancerDataNode node = new DiskBalancerDataNode(UUID.randomUUID().toString());
    // All disks have same capacity of data
    DiskBalancerVolume volume1 = createVolume("volume1", 100, 30);
    DiskBalancerVolume volume2 = createVolume("volume2", 100, 30);
    DiskBalancerVolume volume3 = createVolume("volume3", 100, 30);
    node.addVolume(volume1);
    node.addVolume(volume2);
    node.addVolume(volume3);
    nullConnector.addNode(node);
    cluster.readClusterInfo();
    Assert.assertEquals(1, cluster.getNodes().size());
    GreedyPlanner planner = new GreedyPlanner(10.0f, node);
    NodePlan plan = new NodePlan(node.getDataNodeName(), node.getDataNodePort());
    planner.balanceVolumeSet(node, node.getVolumeSets().get("SSD"), plan);
    // since we have same size of data in all disks , we should have
    // no moves planned.
    assertEquals(0, plan.getVolumeSetPlans().size());
}

Example 2 with GreedyPlanner

use of org.apache.hadoop.hdfs.server.diskbalancer.planner.GreedyPlanner in project hadoop by apache.

the class TestPlanner method testNodePlanSerialize.

@Test
public void testNodePlanSerialize() throws Exception {
    final int diskCount = 12;
    DiskBalancerTestUtil util = new DiskBalancerTestUtil();
    DiskBalancerVolumeSet vSet = util.createRandomVolumeSet(StorageType.SSD, diskCount);
    NullConnector nullConnector = new NullConnector();
    DiskBalancerCluster cluster = new DiskBalancerCluster(nullConnector);
    DiskBalancerDataNode node = new DiskBalancerDataNode(UUID.randomUUID().toString());
    int diskNum = 0;
    for (DiskBalancerVolume vol : vSet.getVolumes()) {
        vol.setPath("volume" + diskNum++);
        node.addVolume(vol);
    }
    nullConnector.addNode(node);
    cluster.readClusterInfo();
    GreedyPlanner newPlanner = new GreedyPlanner(01.0f, node);
    NodePlan newPlan = new NodePlan(node.getDataNodeName(), node.getDataNodePort());
    newPlanner.balanceVolumeSet(node, node.getVolumeSets().get("SSD"), newPlan);
    String planString = newPlan.toJson();
    assertNotNull(planString);
    NodePlan copy = NodePlan.parseJson(planString);
    assertNotNull(copy);
    assertEquals(newPlan.getVolumeSetPlans().size(), copy.getVolumeSetPlans().size());
}

Example 3 with GreedyPlanner

use of org.apache.hadoop.hdfs.server.diskbalancer.planner.GreedyPlanner in project hadoop by apache.

the class TestPlanner method testGreedyPlannerOneVolumeNoPlanTest.

@Test
public void testGreedyPlannerOneVolumeNoPlanTest() throws Exception {
    NullConnector nullConnector = new NullConnector();
    DiskBalancerCluster cluster = new DiskBalancerCluster(nullConnector);
    DiskBalancerDataNode node = new DiskBalancerDataNode(UUID.randomUUID().toString());
    DiskBalancerVolume volume30 = createVolume("volume30", 100, 30);
    node.addVolume(volume30);
    nullConnector.addNode(node);
    cluster.readClusterInfo();
    Assert.assertEquals(1, cluster.getNodes().size());
    GreedyPlanner planner = new GreedyPlanner(10.0f, node);
    NodePlan plan = new NodePlan(node.getDataNodeName(), node.getDataNodePort());
    planner.balanceVolumeSet(node, node.getVolumeSets().get("SSD"), plan);
    // With a single volume we should not have any plans for moves.
    assertEquals(0, plan.getVolumeSetPlans().size());
}

Example 4 with GreedyPlanner

use of org.apache.hadoop.hdfs.server.diskbalancer.planner.GreedyPlanner in project hadoop by apache.

the class TestPlanner method testGreedyPlannerTwoVolume.

@Test
public void testGreedyPlannerTwoVolume() throws Exception {
    NullConnector nullConnector = new NullConnector();
    DiskBalancerCluster cluster = new DiskBalancerCluster(nullConnector);
    DiskBalancerDataNode node = new DiskBalancerDataNode(UUID.randomUUID().toString());
    DiskBalancerVolume volume30 = createVolume("volume30", 100, 30);
    DiskBalancerVolume volume10 = createVolume("volume10", 100, 10);
    node.addVolume(volume10);
    node.addVolume(volume30);
    nullConnector.addNode(node);
    cluster.readClusterInfo();
    Assert.assertEquals(1, cluster.getNodes().size());
    GreedyPlanner planner = new GreedyPlanner(5.0f, node);
    NodePlan plan = new NodePlan(node.getDataNodeUUID(), node.getDataNodePort());
    planner.balanceVolumeSet(node, node.getVolumeSets().get("SSD"), plan);
    // We should have only one planned move from
    // volume30 to volume10 of 10 GB Size.
    assertEquals(1, plan.getVolumeSetPlans().size());
    Step step = plan.getVolumeSetPlans().get(0);
    assertEquals("volume30", step.getSourceVolume().getPath());
    assertEquals("volume10", step.getDestinationVolume().getPath());
    assertEquals("10 G", step.getSizeString(step.getBytesToMove()));
}

Example 5 with GreedyPlanner

use of org.apache.hadoop.hdfs.server.diskbalancer.planner.GreedyPlanner in project hadoop by apache.

the class TestPlanner method testPlannerScale.

@Test
public void testPlannerScale() throws Exception {
    // it is rare to see more than 48 disks
    final int diskCount = 256;
    DiskBalancerTestUtil util = new DiskBalancerTestUtil();
    DiskBalancerVolumeSet vSet = util.createRandomVolumeSet(StorageType.SSD, diskCount);
    NullConnector nullConnector = new NullConnector();
    DiskBalancerCluster cluster = new DiskBalancerCluster(nullConnector);
    DiskBalancerDataNode node = new DiskBalancerDataNode(UUID.randomUUID().toString());
    int diskNum = 0;
    for (DiskBalancerVolume vol : vSet.getVolumes()) {
        vol.setPath("volume" + diskNum++);
        node.addVolume(vol);
    }
    nullConnector.addNode(node);
    cluster.readClusterInfo();
    GreedyPlanner newPlanner = new GreedyPlanner(01.0f, node);
    NodePlan newPlan = new NodePlan(node.getDataNodeName(), node.getDataNodePort());
    newPlanner.balanceVolumeSet(node, node.getVolumeSets().get("SSD"), newPlan);
    // Assuming that our random disks at least generated one step
    assertTrue("No Steps Generated from random disks, very unlikely", newPlan.getVolumeSetPlans().size() > 0);
    assertTrue("Steps Generated less than disk count - false", newPlan.getVolumeSetPlans().size() < diskCount);
    LOG.info("Number of steps are : %d%n", newPlan.getVolumeSetPlans().size());
}