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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.clustercontroller.core;
import com.yahoo.vdslib.distribution.ConfiguredNode;
import com.yahoo.vdslib.state.ClusterState;
import com.yahoo.vdslib.state.NodeState;
import com.yahoo.vdslib.state.NodeType;
import com.yahoo.vdslib.state.State;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import static org.junit.Assert.assertEquals;
public class DistributionBitCountTest extends FleetControllerTest {
private void setUpSystem(String testName) throws Exception {
List<ConfiguredNode> configuredNodes = new ArrayList<>();
for (int i = 0 ; i < 10; i++) {
configuredNodes.add(new ConfiguredNode(i, false));
}
FleetControllerOptions options = defaultOptions("mycluster", configuredNodes);
options.distributionBits = 17;
setUpFleetController(false, options);
startingTest(testName);
List<DummyVdsNode> nodes = setUpVdsNodes(false, new DummyVdsNodeOptions(), true, configuredNodes);
for (DummyVdsNode node : nodes) {
node.setNodeState(new NodeState(node.getType(), State.UP).setMinUsedBits(20));
node.connect();
}
waitForState("version:\\d+ bits:17 distributor:10 storage:10");
}
/**
* Test that then altering config to increased bit count, that a new system state is sent out if the least split storagenode use more bits.
* Test that then altering config to increased bit count, that a new system state is not sent out (and not altered) if a storagenode needs it to be no further split.
*/
@Test
public void testDistributionBitCountConfigIncrease() throws Exception {
setUpSystem("DistributionBitCountTest::testDistributionBitCountConfigIncrease");
options.distributionBits = 20;
fleetController.updateOptions(options);
ClusterState currentState = waitForState("version:\\d+ bits:20 distributor:10 storage:10");
int version = currentState.getVersion();
options.distributionBits = 23;
fleetController.updateOptions(options);
assertEquals(version, currentState.getVersion());
}
/**
* Test that then altering config to decrease bit count, that a new system state is sent out with that bit count.
*/
@Test
public void testDistributionBitCountConfigDecrease() throws Exception {
setUpSystem("DistributionBitCountTest::testDistributionBitCountConfigDecrease");
options.distributionBits = 12;
fleetController.updateOptions(options);
waitForState("version:\\d+ bits:12 distributor:10 storage:10");
}
/**
* Test that when storage node reports higher bit count, but another storage
* node has equally low bitcount, the fleetcontroller does nothing.
*
* Test that when storage node reports higher bit count, but another storage
* node now being lowest, the fleetcontroller adjusts to use that bit in system state.
*/
@Test
public void testStorageNodeReportingHigherBitCount() throws Exception {
setUpSystem("DistributionBitCountTest::testStorageNodeReportingHigherBitCount");
nodes.get(1).setNodeState(new NodeState(NodeType.STORAGE, State.UP).setMinUsedBits(11));
nodes.get(3).setNodeState(new NodeState(NodeType.STORAGE, State.UP).setMinUsedBits(11));
ClusterState startState = waitForState("version:\\d+ bits:11 distributor:10 storage:10");
nodes.get(1).setNodeState(new NodeState(NodeType.STORAGE, State.UP).setMinUsedBits(12));
assertEquals(startState + "->" + fleetController.getSystemState(),
startState.getVersion(), fleetController.getSystemState().getVersion());
for (int i = 0; i < 10; ++i) {
// nodes is array of [distr.0, stor.0, distr.1, stor.1, ...] and we just want the storage nodes
nodes.get(i*2 + 1).setNodeState(new NodeState(NodeType.STORAGE, State.UP).setMinUsedBits(17));
}
assertEquals(startState.getVersion() + 1, waitForState("version:\\d+ bits:17 distributor:10 storage:10").getVersion());
}
/**
* Test that then storage node report lower bit count, but another storage node with equally low bitcount, the fleetcontroller does nothing.
* Test that then storage node report lower bit count, and then becomes the smallest, the fleetcontroller adjusts to use that bit in system state.
*/
@Test
public void testStorageNodeReportingLowerBitCount() throws Exception {
setUpSystem("DistributionBitCountTest::testStorageNodeReportingLowerBitCount");
nodes.get(1).setNodeState(new NodeState(NodeType.STORAGE, State.UP).setMinUsedBits(13));
ClusterState currentState = waitForState("version:\\d+ bits:13 distributor:10 storage:10");
int version = currentState.getVersion();
nodes.get(3).setNodeState(new NodeState(NodeType.STORAGE, State.UP).setMinUsedBits(15));
assertEquals(version, currentState.getVersion());
nodes.get(3).setNodeState(new NodeState(NodeType.STORAGE, State.UP).setMinUsedBits(13));
assertEquals(version, currentState.getVersion());
nodes.get(3).setNodeState(new NodeState(NodeType.STORAGE, State.UP).setMinUsedBits(12));
waitForState("version:\\d+ bits:12 distributor:10 storage:10");
}
}
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