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package com.yahoo.vespa.hosted.provision.autoscale;
import com.yahoo.config.provision.Capacity;
import com.yahoo.config.provision.ClusterInfo;
import com.yahoo.config.provision.ClusterResources;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.config.provision.IntRange;
import com.yahoo.config.provision.NodeResources;
import com.yahoo.vespa.hosted.provision.applications.BcpGroupInfo;
import com.yahoo.vespa.hosted.provision.provisioning.DynamicProvisioningTester;
import org.junit.Test;
import java.time.Duration;
import java.util.Optional;
import static org.junit.Assert.assertEquals;
/**
* Tests autoscaling using information from the BCP group this cluster deployment
* is part of to supplement local data when the local deployment lacks sufficient traffic.
*
* @author bratseth
*/
public class AutoscalingUsingBcpGroupInfoTest {
/** Tests with varying BCP group info parameters. */
@Test
public void test_autoscaling_single_content_group() {
var fixture = DynamicProvisioningTester.fixture().awsProdSetup(true).build();
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(100, 1.1, 0.3));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
8, 1, 3.4, 7.4, 29.0,
fixture.autoscale());
// Higher query rate
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(200, 1.1, 0.3));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
8, 1, 6.8, 7.4, 29.0,
fixture.autoscale());
// Higher headroom
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(100, 1.3, 0.3));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
8, 1, 4.0, 7.4, 29.0,
fixture.autoscale());
// Higher per query cost
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(100, 1.1, 0.45));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
8, 1, 5.1, 7.4, 29.0,
fixture.autoscale());
// Bcp elsewhere is 0 - use local only
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(0, 1.1, 0.45));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("Scaling using local info",
8, 1, 1, 7.4, 29.0,
fixture.autoscale());
}
/** Tests with varying BCP group info parameters. */
@Test
public void test_autoscaling_multiple_content_groups() {
var min = new ClusterResources(3, 3,
new NodeResources(1, 4, 10, 1, NodeResources.DiskSpeed.any));
var max = new ClusterResources(21, 3,
new NodeResources(100, 1000, 1000, 1, NodeResources.DiskSpeed.any));
var fixture = DynamicProvisioningTester.fixture()
.awsProdSetup(true)
.initialResources(Optional.of(new ClusterResources(9, 3, new NodeResources(2, 16, 75, 1))))
.capacity(Capacity.from(min, max))
.build();
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(100, 1.1, 0.3));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
3, 3, 11.7, 43.2, 190.0,
fixture.autoscale());
// Higher query rate
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(200, 1.1, 0.3));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
3, 3, 23.1, 43.2, 190.0,
fixture.autoscale());
// Higher headroom
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(100, 1.3, 0.3));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
3, 3, 13.8, 43.2, 190.0,
fixture.autoscale());
// Higher per query cost
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(100, 1.1, 0.45));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
3, 3, 17.4, 43.2, 190.0,
fixture.autoscale());
}
/**
* Tests with varying BCP group info parameters for containers.
* Differences from content
* - No host sharing.
* - Memory and disk is independent of cluster size.
*/
@Test
public void test_autoscaling_container() {
var fixture = DynamicProvisioningTester.fixture().clusterType(ClusterSpec.Type.container).awsProdSetup(true).build();
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(100, 1.1, 0.3));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
4, 1, 8.0, 16.0, 40.8,
fixture.autoscale());
// Higher query rate (mem and disk changes are due to being assigned larger hosts where we get less overhead share
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(200, 1.1, 0.3));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
7, 1, 8.0, 16.0, 40.8,
fixture.autoscale());
// Higher headroom
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(100, 1.3, 0.3));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
8, 1, 4.0, 16.0, 40.8,
fixture.autoscale());
// Higher per query cost
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(100, 1.1, 0.45));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
10, 1, 4.0, 16.0, 40.8,
fixture.autoscale());
}
@Test
public void test_autoscaling_with_bcp_deadline() {
var capacity = Capacity.from(new ClusterResources(2, 1,
new NodeResources(1, 4, 10, 1, NodeResources.DiskSpeed.any)),
new ClusterResources(20, 1,
new NodeResources(100, 1000, 1000, 1, NodeResources.DiskSpeed.any)),
IntRange.empty(), false, true, Optional.empty(),
new ClusterInfo.Builder().bcpDeadline(Duration.ofMinutes(60)).build());
var fixture = DynamicProvisioningTester.fixture()
.capacity(capacity)
.clusterType(ClusterSpec.Type.container).awsProdSetup(true).build();
// We can rescale within deadline - do not take BCP info into account
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(100, 1.1, 0.45));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("No need for traffic shift headroom",
3, 1, 4.0, 16.0, 40.8,
fixture.autoscale());
}
@Test
public void test_autoscaling_single_content_group_with_some_local_traffic() {
var fixture = DynamicProvisioningTester.fixture().awsProdSetup(true).build();
// Baseline: No local traffic, group traffic indicates much higher cpu usage than local
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(200, 1.3, 0.45));
fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
8, 1, 11.9, 7.4, 29.0,
fixture.autoscale());
// Some local traffic
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(200, 1.3, 0.45));
Duration duration1 = fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().clock().advance(duration1.negated());
fixture.loader().addQueryRateMeasurements(10, __ -> 10.0);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
8, 1, 6.8, 7.4, 29.0,
fixture.autoscale());
// Enough local traffic to get half the votes
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(200, 1.3, 0.45));
Duration duration2 = fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().clock().advance(duration2.negated());
fixture.loader().addQueryRateMeasurements(10, __ -> 50.0);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
8, 1, 3.0, 7.4, 29.0,
fixture.autoscale());
// Mostly local
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(200, 1.3, 0.45));
Duration duration3 = fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().clock().advance(duration3.negated());
fixture.loader().addQueryRateMeasurements(10, __ -> 90.0);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
8, 1, 2.2, 7.4, 29.0,
fixture.autoscale());
// Local only
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(200, 1.3, 0.45));
Duration duration4 = fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().clock().advance(duration4.negated());
fixture.loader().addQueryRateMeasurements(10, __ -> 100.0);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
8, 1, 2.1, 7.4, 29.0,
fixture.autoscale());
// No group info, should be the same as the above
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(BcpGroupInfo.empty());
Duration duration5 = fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().clock().advance(duration5.negated());
fixture.loader().addQueryRateMeasurements(10, __ -> 100.0);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
8, 1, 2.1, 7.4, 29.0,
fixture.autoscale());
// 40 query rate, no group info (for reference to the below)
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(BcpGroupInfo.empty());
Duration duration6 = fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().clock().advance(duration6.negated());
fixture.loader().addQueryRateMeasurements(10, __ -> 40.0);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
8, 1, 1.5, 7.4, 29.0,
fixture.autoscale());
// Local query rate is too low but global is even lower so disregard it, giving the same as above
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(200 / 40.0, 1.3, 0.45 * 40.0));
Duration duration7 = fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().clock().advance(duration7.negated());
fixture.loader().addQueryRateMeasurements(10, __ -> 40.0);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
8, 1, 1.5, 7.4, 29.0,
fixture.autoscale());
// Local query rate is too low to be fully confident, and so is global but as it is slightly larger, incorporate it slightly
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(200 / 4.0, 1.3, 0.45 * 4.0));
Duration duration8 = fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().clock().advance(duration8.negated());
fixture.loader().addQueryRateMeasurements(10, __ -> 40.0);
fixture.tester().assertResources("Scaling up cpu using bcp group cpu info",
8, 1, 1.8, 7.4, 29.0,
fixture.autoscale());
}
@Test
public void test_autoscaling_containers_with_some_local_traffic() {
var fixture = DynamicProvisioningTester.fixture().clusterType(ClusterSpec.Type.container).awsProdSetup(true).build();
// Some local traffic
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.store(new BcpGroupInfo(200, 1.9, 0.01));
Duration duration1 = fixture.loader().addCpuMeasurements(0.58f, 10);
fixture.tester().clock().advance(duration1.negated());
fixture.loader().addQueryRateMeasurements(10, __ -> 10.0);
fixture.tester().assertResources("Not scaling down due to group info, even though it contains much evidence queries are cheap",
3, 1, 4.0, 16.0, 40.8,
fixture.autoscale());
}
/** Tests with varying BCP group info parameters. */
@Test
public void test_autoscaling_metrics() {
var fixture = DynamicProvisioningTester.fixture().awsProdSetup(true).build();
// Empty has metrics at zero
assertEquals(new Autoscaling.Metrics(0, 0, 0),
fixture.autoscale().metrics());
// No external load mesurements -> 0
fixture.tester().clock().advance(Duration.ofDays(2));
fixture.loader().addCpuMeasurements(0.7f, 10);
assertEquals(new Autoscaling.Metrics(0, 1.0, 0),
fixture.autoscale().metrics());
// External load is measured to zero -> 0
fixture.tester().clock().advance(Duration.ofDays(2));
var duration = fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().clock().advance(duration.negated());
fixture.loader().addQueryRateMeasurements(10, i -> 0.0);
assertEquals(new Autoscaling.Metrics(0, 1.0, 0),
fixture.autoscale().metrics());
// External load
fixture.tester().clock().advance(Duration.ofDays(2));
duration = fixture.loader().addCpuMeasurements(0.7f, 10);
fixture.tester().clock().advance(duration.negated());
fixture.loader().addQueryRateMeasurements(10, i -> 110.0);
assertEquals(new Autoscaling.Metrics(110, 1.0, 0.05),
round(fixture.autoscale().metrics()));
}
private Autoscaling.Metrics round(Autoscaling.Metrics metrics) {
return new Autoscaling.Metrics(Math.round(metrics.queryRate() * 100) / 100.0,
Math.round(metrics.growthRateHeadroom() * 100) / 100.0,
Math.round(metrics.cpuCostPerQuery() * 100) / 100.0);
}
}
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