protected AutoscalingConfigurationSet(IAutoscalingConfigurationSet configurationSet)
{
DemoMode = configurationSet.DemoMode;
IncreaseInterval = configurationSet.IncreaseInterval;
DecreaseInterval = configurationSet.DecreaseInterval;
Reads = new AutoscalingConfiguration(configurationSet.Reads);
Writes = new AutoscalingConfiguration(configurationSet.Writes);
}
public async Task EnsureProvisioningAsync_ShouldNotCallUpdateOnClientWhenValuesAreTheSame()
{
var readsConfiguration = new AutoscalingConfiguration {EnableAutoscaling = true};
var writesConfiguration = new AutoscalingConfiguration {EnableAutoscaling = true};
var configurationSet = new TableAutoscalingConfigurationSet
{
TableName = tableName, DemoMode = false, Reads = readsConfiguration, Writes = writesConfiguration,
};
var provisioned = new DynamoDbTableThroughput { ReadThroughput = 500, WriteThroughput = 1000 };
var updated = new DynamoDbTableThroughput { ReadThroughput = 500, WriteThroughput = 1000 };
await tableProvisioner.ProvisionAsync(configurationSet, provisioned, updated);
throughputClientMock.Verify(
client => client.SetTableThroughputLevelAsync(tableName, 500, 1000, default(CancellationToken)),
Times.Never);
}
internal long ComputeUpdatedProvisioned(
long provisioned,
AutoscaleDirection autoscaleDirection,
DynamoDbThroughputMetrics metrics,
AutoscalingConfiguration configuration)
{
var increasePercent = configuration.IncreaseWithPercent.GetValueOrDefault();
var decreasePercent = configuration.DecreaseWithPercent.GetValueOrDefault();
var minProvisioned = configuration.MinProvisioned.GetValueOrDefault();
var maxProvisioned = configuration.MaxProvisioned.GetValueOrDefault();
return ComputeUpdatedProvisioned(
autoscaleDirection, provisioned, increasePercent, decreasePercent, minProvisioned, maxProvisioned);
}
internal AutoscaleDirection ComputeScaleDirection(
bool isCircuitBreakerTripped,
long provisioned,
DynamoDbThroughputMetrics metrics,
AutoscalingConfiguration configuration)
{
var upperThreshold = configuration.UpperThreshold.GetValueOrDefault();
var lowerThreshold = configuration.LowerThreshold.GetValueOrDefault();
var throttleThreshold = configuration.ThrottleThreshold.GetValueOrDefault();
return ComputeScaleDirection(
isCircuitBreakerTripped, provisioned, metrics.ConsumedCapacityUnits, upperThreshold, lowerThreshold, throttleThreshold,
metrics.ThrottleEvents, metrics.ConsumptionDirection, metrics.ThrottleDirection);
}
internal long EnsureProvision(
bool isCircuitBreakerTripped,
long provisioned,
DynamoDbThroughputMetrics metrics,
AutoscalingConfiguration configuration)
{
var scaleDirection = ComputeScaleDirection(isCircuitBreakerTripped, provisioned, metrics, configuration);
var updated = ComputeUpdatedProvisioned(provisioned, scaleDirection, metrics, configuration);
return updated;
}
protected AutoscalingConfigurationSet()
{
Reads = new AutoscalingConfiguration();
Writes = new AutoscalingConfiguration();
}