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 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 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;
}