public async Task ScaleDownIncrementally()
{
IList <CosmosDbScalingCollectionSettings> settingsToUpdate = new List <CosmosDbScalingCollectionSettings>();
IEnumerable <CosmosDbScalingCollectionSettings> collectionsToProcess = await _scalingConfigRepositoryPolicy.ExecuteAsync(() =>
_cosmosDbScalingConfigRepository.GetCollectionSettingsIncremented(previousMinutestoCheckForScaledCollections));
if (collectionsToProcess.IsNullOrEmpty())
{
return;
}
_logger.Information($"Found {collectionsToProcess.Count()} collections to scale down");
foreach (CosmosDbScalingCollectionSettings settings in collectionsToProcess)
{
try
{
int requestUnitsToDecrement;
if ((settings.CurrentRequestUnits - settings.LastScalingIncrementValue) < settings.MinRequestUnits)
{
requestUnitsToDecrement = (settings.CurrentRequestUnits - settings.MinRequestUnits);
if (requestUnitsToDecrement <= 0)
{
continue;
}
}
else
{
requestUnitsToDecrement = settings.LastScalingIncrementValue;
}
int requestUnits = settings.CurrentRequestUnits - requestUnitsToDecrement;
settings.CurrentRequestUnits = requestUnits;
await ScaleCollection(settings.CosmosCollectionType, requestUnits);
await UpdateCollectionSettings(settings, CosmosDbScalingDirection.Down, requestUnitsToDecrement);
}
catch (Exception ex)
{
throw new RetriableException($"Failed to scale down collection for repository type '{settings.CosmosCollectionType}'", ex);
}
}
}
public async Task ScaleDownIncrementally()
{
IEnumerable <CosmosDbScalingCollectionSettings> collectionsToProcess = await _scalingConfigRepositoryPolicy.ExecuteAsync(() =>
_cosmosDbScalingConfigRepository.GetCollectionSettingsIncremented(previousMinutestoCheckForScaledCollections));
if (collectionsToProcess.IsNullOrEmpty())
{
return;
}
_logger.Information($"Found {collectionsToProcess.Count()} collections to scale down");
foreach (CosmosDbScalingCollectionSettings settings in collectionsToProcess)
{
try
{
int previousCurrentRequestUnits = settings.CurrentRequestUnits;
settings.CurrentRequestUnits = Math.Max(previousCurrentRequestUnits - settings.LastScalingIncrementValue, settings.MinRequestUnits);
int?minimumRequestUnitsAllowed = await GetMinimumThroughput(settings.CosmosCollectionType);
if (minimumRequestUnitsAllowed.HasValue && settings.CurrentRequestUnits < minimumRequestUnitsAllowed.Value)
{
settings.CurrentRequestUnits = minimumRequestUnitsAllowed.Value;
}
int requestUnitsToDecrement = previousCurrentRequestUnits - settings.CurrentRequestUnits;
if (requestUnitsToDecrement <= 0)
{
continue;
}
settings.CurrentRequestUnits = await ScaleCollection(settings.CosmosCollectionType, settings.CurrentRequestUnits, settings.MaxRequestUnits);
await UpdateCollectionSettings(settings, CosmosDbScalingDirection.Down, requestUnitsToDecrement);
}
catch (Exception ex)
{
throw new RetriableException($"Failed to scale down collection for repository type '{settings.CosmosCollectionType}'", ex);
}
}
}
