public void LogPerformanceWorkloadTest(
out float MBPerSecond
)
{
try
{
//* Local functions
Func <ILogManager>
MakeManager = (() =>
{
Task <ILogManager> t = LogManager.OpenAsync(LogManager.LoggerType.Default, CancellationToken.None);
t.Wait();
return(t.Result);
});
Func <ILogManager, string, Guid, long, uint, uint, IPhysicalLog>
MakePhyLog = ((
ILogManager manager,
string pathToCommonContainer,
Guid physicalLogId,
long containerSize,
uint maximumNumberStreams,
uint maximumLogicalLogBlockSize) =>
{
Task <IPhysicalLog> t = manager.CreatePhysicalLogAsync(
pathToCommonContainer,
physicalLogId,
containerSize,
maximumNumberStreams,
maximumLogicalLogBlockSize,
0, // Physical logs are not sparse
CancellationToken.None);
t.Wait();
return(t.Result);
});
Func <ILogManager, string, Guid, IPhysicalLog>
OpenPhyLog = ((
ILogManager manager,
string pathToCommonContainer,
Guid physicalLogId) =>
{
Task <IPhysicalLog> t = manager.OpenPhysicalLogAsync(
pathToCommonContainer,
physicalLogId,
false,
CancellationToken.None);
t.Wait();
return(t.Result);
});
string physLogName = PlatformPathPrefix + _SharedDrive + PlatformPathDelimiter + "PerfWorkloadTestP.log";
ILogManager logManager = MakeManager();
try
{
File.Delete(physLogName.Substring(4));
}
catch (Exception)
{
// ok if this fails
}
Console.WriteLine("Raw Record size is {0}", _RecordSize);
Guid logId = Guid.NewGuid();
string logName = physLogName;
IPhysicalLog phyLog = MakePhyLog(
logManager,
logName,
logId,
_LogSize,
0,
4 * _RecordSize);
//
// Determine the largest record size. We write full records to maximmize our I/O rate.
// Max record size is determined by the Maximum block size plus the metadata space (4K) minus the
// overhead of the headers.
//
//const int MaxLogBlkSize = 1024 * 1024;
//const int recordSize = 131;
CancellationTokenSource[] cancelToken = new CancellationTokenSource[_NumberTasks];
Task[] tasks = new Task[_NumberTasks];
ILogicalLog[] lLogs = new ILogicalLog[_NumberTasks];
int bytesToWrite = 1;
this.StartPerfWorkloads.Reset();
for (int i = 0; i < _NumberTasks; i++)
{
//
// MUltiply record size by 4 so log is created with correct geometry
//
Guid lLogId = Guid.NewGuid();
string logicalLogName = PlatformPathPrefix + _DedicatedDrive + PlatformPathDelimiter + "Perf" + lLogId.ToString() + ".log";
lLogs[i] = CreateLogicalLog(phyLog,
lLogId,
null,
logicalLogName,
null,
_LlogSize,
4 * _RecordSize);
lLogs[i].CloseAsync(CancellationToken.None).Wait();
lLogs[i] = null;
lLogs[i] = OpenLogicalLog(phyLog, lLogId);
//
// Harvest the size of a complete buffer to write
//
bytesToWrite = (int)lLogs[i].MaximumBlockSize;
}
//
// Get a buffer
//
Console.WriteLine("Each formatted record contains {0} bytes", bytesToWrite);
StartWorkloadThreads(lLogs, _NumberTasks, (int)_RecordSize, cancelToken, out MBPerSecond);
for (int i = 0; i < _NumberTasks; i++)
{
lLogs[i].CloseAsync(CancellationToken.None).Wait();
lLogs[i] = null;
}
phyLog.CloseAsync(CancellationToken.None).Wait();
phyLog = null;
//* Cleanup
logManager.DeletePhysicalLogAsync(logName, logId, CancellationToken.None).Wait();
logManager.CloseAsync(CancellationToken.None).Wait();
try
{
File.Delete(physLogName.Substring(4));
}
catch (Exception)
{
// ok if this fails
}
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
throw;
}
}
