public void It_Should_Recommend_Correct_Throughput_Value_For_Growth_Rate(int partitionCount, double maximumRequestUnitValue, double growthRate, int expectedThroughput)
{
// act
var result = CosmosDbThroughputHelper.GetRecommendedThroughput(partitionCount, maximumRequestUnitValue,
AbstractCosmosDbPersistenceThroughputMonitor.DefaultMinimumThroughput, AbstractCosmosDbPersistenceThroughputMonitor.DefaultMaximumThroughput, growthRate);
// assert
Assert.Equal(expectedThroughput, result);
}
private async Task PerformUpdateThroughputAsync(string correlationId, string collectionName, IEnumerable <Metric> throughputMetrics)
{
if (throughputMetrics == null || !throughputMetrics.Any())
{
_logger.Warn(correlationId, $"PerformUpdateThroughputAsync: Skip to update throughput of collection '{collectionName}', because of missing throughput metrics.");
return;
}
// 1. Group throughput metrics by name
var groupedMetricsData = throughputMetrics.GroupBy(metric => metric.Name.Value);
var groupedMetrics = groupedMetricsData.FirstOrDefault();
if (groupedMetrics == null)
{
_logger.Warn(correlationId, $"PerformUpdateThroughputAsync: Unable to group throughput metrics for collection '{collectionName}'.");
return;
}
// 2. Retrieve maximum Request Unit value and partition count
var partitionCount = groupedMetrics.Count();
var maximumRequestUnitValue = 0.0;
foreach (var metric in groupedMetrics)
{
if (metric.MetricValues == null)
{
continue;
}
maximumRequestUnitValue = Math.Max(maximumRequestUnitValue, metric.MetricValues.Max(metricValue => metricValue.Maximum) ?? 0);
}
var recommendedThroughput = CosmosDbThroughputHelper.GetRecommendedThroughput(partitionCount, maximumRequestUnitValue, MinimumThroughput, MaximumThroughput, GrowthRate);
_logger.Info(correlationId, $"PerformUpdateThroughputAsync for collection '{collectionName}': recommended throughput '{recommendedThroughput}' " +
$"based on '{groupedMetrics.Key}': '{maximumRequestUnitValue}' " +
$"with partition count '{partitionCount}' and throughput range '[{MinimumThroughput}, {MaximumThroughput}]' and a growth rate of '{GrowthRate}'.");
// 3. Perform updating throughput of CosmosDB collection by recommended value
await PerformUpdateThroughputAsync(correlationId, collectionName, recommendedThroughput);
}