private async Task <int> Append(IStreamStore streamStore, CancellationToken ct)
{
var numberOfStreams = Input.ReadInt("Number of streams: ", 1, 100000000);
int parallelTasks = Input.ReadInt(
$"Number of parallel write tasks (Processor count = {Environment.ProcessorCount}): ", 1, 100);
int numberOfMessagesToWrite = Input.ReadInt(
$"Number message to append: ", 1, 10000000);
int messageJsonDataSize = Input.ReadInt("Size of Json (bytes): ", 1, 10 * 1024 * 1024);
int numberOfMessagesPerAmend = Input.ReadInt("Number of messages per append: ", 1, 1000);
var tasks = new List <Task>();
int count = 0;
string jsonData = new string('a', messageJsonDataSize);
var stopwatch = Stopwatch.StartNew();
for (int i = 0; i < parallelTasks; i++)
{
var random = new Random();
var task = Task.Run(async() =>
{
var messageNumbers = new int[numberOfMessagesPerAmend];
while (!ct.IsCancellationRequested && count < numberOfMessagesToWrite)
{
try
{
int streamNumber = random.Next(0, numberOfStreams);
for (int j = 0; j < numberOfMessagesPerAmend; j++)
{
messageNumbers[j] = Interlocked.Increment(ref count);
}
var newmessages = MessageFactory
.CreateNewStreamMessages(jsonData, messageNumbers);
var info = $"{streamNumber}";
Log.Logger.Information($"Begin {info}");
await streamStore.AppendToStream(
$"stream-{streamNumber}",
ExpectedVersion.Any,
newmessages,
ct);
Log.Logger.Information($"End {info}");
Console.Write($"\r> {messageNumbers[numberOfMessagesPerAmend - 1]}");
}
catch (Exception ex) when(!(ex is TaskCanceledException))
{
Log.Logger.Error(ex, ex.Message);
Output.WriteLine(ex.ToString());
}
}
}, ct);
tasks.Add(task);
}
await Task.WhenAll(tasks);
stopwatch.Stop();
var rate = Math.Round((decimal)count / stopwatch.ElapsedMilliseconds * 1000, 0);
Output.WriteLine("");
Output.WriteLine($"> {count} messages written in {stopwatch.Elapsed} ({rate} m/s)");
return(count);
}