/*
* Accepts a new job from the data center. Returns true if the job was accepted,
* false if it was not.
*/
public Boolean AcceptJob(bool SimStart)
{
Boolean jobAccepted = false;
if (!SimStart && (GV.VMStatus)GV.GlobalComms.Rows[SpaceNumber]["Status"] == GV.VMStatus.justArrived)
{
if (DataCenter.CheckForExistingJob(SpaceNumber))
{
TransType = GV.TransmissionType.recReturnVM;
return(true);
}
else
{
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.idle;
}
}
if ((int)GV.GlobalComms.Rows[SpaceNumber]["Time"] <= GV.tooClose)
{
if (SimStart || (GV.VMStatus)GV.GlobalComms.Rows[SpaceNumber]["Status"] == GV.VMStatus.idle)
{
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.unavailable;
}
}
else if (((GV.VMStatus)GV.GlobalComms.Rows[SpaceNumber]["Status"] == GV.VMStatus.idle) ||
SimStart)
{
if ((GV.VMStatus)GV.GlobalComms.Rows[SpaceNumber]["Status"] == GV.VMStatus.idle)
{
if (DataCenter.FindBackupLocations(SpaceNumber))
{
GV.GlobalComms.Rows[SpaceNumber]["Primary"] = SpaceNumber;
Job NewJob = new Job();
CurrentJob = NewJob;
DataCenter.AssignJobtoBackups(CurrentJob, SpaceNumber);
if (SimStart)
{
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.processing;
BackupsNeeded = GV.BackupsNeeded.none;
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = SpaceNumber;
}
else
{
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.receiving;
TransType = GV.TransmissionType.recInputData;
BackupsNeeded = GV.BackupsNeeded.BothBackups;
DownloadDataSize = CurrentJob.inputDataSize;
RemainingDatatoTransmit = CurrentJob.inputDataSize;
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = GV.DCAddress;
// To do, set backup locations currentjobs to new job
}
// Estimate of how long it will take to offload final data
TimeToTransferFinalData = (int)Math.Round(CurrentJob.outputDataSize / (54.0 / 20), 0);
TimeToTransferVM = TimeToTransferFinalData +
(int)Math.Round(4000 / (54.0 / 20), 0);
jobAccepted = true;
} // find backup locations successful
else
{
//MessageBox.Show("W:" + SpaceNumber + "No backup found");
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.idle;
GV.GlobalComms.Rows[SpaceNumber]["Primary"] = -1;
}
} // if available
else // not available
{
//do nothing
}
}
return(jobAccepted);
} // AcceptJob
static void Main(string[] args)
{
Simulation sim = new Simulation("SomeSimulation", @"C:\CSSL");
Settings.WriteOutput = false;
Settings.NotifyObservers = true;
// Parameters...
double dispatchTime = 1E-3;
double lambda = 100;
int numberServerpools = 10;
int numberServerpoolsToChooseFrom = 10;
// The experiment part...
sim.MyExperiment.NumberOfReplications = 3;
sim.MyExperiment.LengthOfReplication = 10;
sim.MyExperiment.LengthOfWarmUp = 2;
// The model part...
DataCenter dataCenter = new DataCenter(sim.MyModel, "DataCenter");
for (int i = 0; i < numberServerpools; i++)
{
dataCenter.AddServerpool(new ServerPool(dataCenter, $"Serverpool_{i}"));
}
Dispatcher dispatcher = new Dispatcher(dataCenter, "Dispatcher", new ExponentialDistribution(1), double.PositiveInfinity, dataCenter.ServerPools, dispatchTime, numberServerpoolsToChooseFrom);
dataCenter.SetDispatcher(dispatcher);
JobGenerator jobGenerator = new JobGenerator(dataCenter, "JobGenerator", new ExponentialDistribution(lambda), dispatcher);
dataCenter.SetJobGenerator(jobGenerator);
// The observer part...
DispatcherObserver dispatcherObserver = new DispatcherObserver(sim);
dispatcher.Subscribe(dispatcherObserver);
DataCenterObserver dataCenterObserver = new DataCenterObserver(sim);
dataCenter.Subscribe(dataCenterObserver);
foreach (ServerPool serverpool in dataCenter.ServerPools)
{
ServerPoolObserver serverpoolObserver = new ServerPoolObserver(sim);
serverpool.Subscribe(serverpoolObserver);
}
// Run...
sim.Run();
// The reporting part...
SimulationReporter reporter = sim.MakeSimulationReporter();
reporter.PrintSummaryToFile();
reporter.PrintSummaryToConsole();
}
} // Transmit
// The receive cycle is at the end of the time loop. It checks the status of each car and takes appropriate
// action based on the status and the transmission type, if any.
public void Receive()
{
// Decrement the time left in the shift for th ecurrent car.
GV.GlobalComms.Rows[SpaceNumber]["Time"] = (int)GV.GlobalComms.Rows[SpaceNumber]["Time"] - 1;
// Check the car's status
switch ((GV.VMStatus)GV.GlobalComms.Rows[SpaceNumber]["Status"])
{
// If the car was processing, then call to run the current job.
case GV.VMStatus.processing:
// If the current job is complete, set the status to transmitting, and the transmission
// type to final data.
if (CurrentJob.Run()) // returns true if job is complete
{
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.transmitting;
TransType = GV.TransmissionType.transFinalData;
RemainingDatatoTransmit = CurrentJob.outputDataSize;
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = GV.DCAddress;
}
// If the job didn't complete, then check to see if we are leaving soon and need to start
// migrating our VM. If so, we always migrate to the car holding our random backup. That
// car will send the job back to the new car occupying this same spot.
else if ((int)GV.GlobalComms.Rows[SpaceNumber]["Time"] <= StartMigration)
{
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.transmitting;
TransType = GV.TransmissionType.transVM;
int randomBackup = Convert.ToInt32(GV.GlobalComms.Rows[SpaceNumber]["RandomBackup"]);
if (randomBackup != -1)
{
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = randomBackup;
RemainingDatatoTransmit = GV.VMSize + CurrentJob.outputDataSize;
DataCenter.NotifyPartnerofTransfer((int)GV.GlobalComms.Rows[SpaceNumber]["RandomBackup"], RemainingDatatoTransmit, GV.TransmissionType.recVM, CurrentJob);
}
}
break;
//If we are holding, we first check to see if we need to offload the backup.
//We do that if we have less than an hour in our shift.
case GV.VMStatus.holding:
int newBackupLoc = -1;
if ((int)GV.GlobalComms.Rows[SpaceNumber]["Time"] <= GV.tooClose)
{
Boolean bBackupFound = false;
int PrimaryCar = (int)GV.GlobalComms.Rows[SpaceNumber]["Primary"];
if (Convert.ToInt32(GV.GlobalComms.Rows[SpaceNumber]["RandomBackup"]) == SpaceNumber &&
Convert.ToInt32(GV.GlobalComms.Rows[PrimaryCar]["LocalBackup"]) != -1)
{
bBackupFound = DataCenter.FindRandomBackupLocation(PrimaryCar);
if (bBackupFound)
{
newBackupLoc = (int)GV.GlobalComms.Rows[PrimaryCar]["RandomBackup"];
// Update the two backup locations so that they know about each other.
int localBackup = (int)GV.GlobalComms.Rows[PrimaryCar]["LocalBackup"];
GV.GlobalComms.Rows[newBackupLoc]["LocalBackup"] = localBackup;
GV.GlobalComms.Rows[localBackup]["RandomBackup"] = newBackupLoc;
}
}
else
{
if (Convert.ToInt32(GV.GlobalComms.Rows[SpaceNumber]["LocalBackup"]) == SpaceNumber &&
Convert.ToInt32(GV.GlobalComms.Rows[PrimaryCar]["RandomBackup"]) != -1)
{
bBackupFound = DataCenter.FindLocalBackupLocation(PrimaryCar);
}
if (bBackupFound)
{
newBackupLoc = (int)GV.GlobalComms.Rows[PrimaryCar]["LocalBackup"];
// Update the two backup locations so that they know about each other.
int randomBackup = (int)GV.GlobalComms.Rows[PrimaryCar]["RandomBackup"];
GV.GlobalComms.Rows[newBackupLoc]["RandomBackup"] = randomBackup;
GV.GlobalComms.Rows[randomBackup]["LocalBackup"] = newBackupLoc;
}
}
if (bBackupFound)
{
int DataSize = CurrentJob.inputDataSize;
DataCenter.NotifyPartnerofTransfer(newBackupLoc, CurrentJob.inputDataSize,
GV.TransmissionType.recBackupData, CurrentJob);
// Let the new backup vehicle know what's up.
DataCenter.AssignJobtoVehicle(CurrentJob, newBackupLoc, PrimaryCar, DataSize);
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.transmitting;
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = newBackupLoc;
GV.GlobalComms.Rows[newBackupLoc]["Partner"] = SpaceNumber;
TransType = GV.TransmissionType.transBackupCopy;
RemainingDatatoTransmit = DataSize;
}
}
break;
// Holding for return is a special status meaning that the primary car running our job has decided to
// leave and has passed us their VM and intermediate data. We have to hold onto the job until the new
// car arrives at the start of the next shift. When that happens, we change our status to transmitting
// and notify the new car that it will be getting the VM back so that it can resume the job our predecessor
// began.
case GV.VMStatus.holdingForReturn:
// Wait until the top of the next hour to send the VM back to the new car
if (GV.intElapsedTime % GV.oneHour == 0)
{
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.transmitting;
TransType = GV.TransmissionType.transReturnVM;
RemainingDatatoTransmit = GV.VMSize + CurrentJob.outputDataSize;
DataCenter.NotifyPartnerofTransfer(Convert.ToInt32(GV.GlobalComms.Rows[SpaceNumber]["Primary"]), RemainingDatatoTransmit,
GV.TransmissionType.recReturnVM, CurrentJob);
}
break;
// If we are idle or unavailable, we do nothing. The unavailable status will be changed when a new car
// arrives in the spot. The idle status will change when we accept a job or a backup.
case GV.VMStatus.idle:
case GV.VMStatus.unavailable:
break;
// There are many transmission types, and each has diffent actions associated with it.
default: // transmitting or receiving
// decrement the remaining data count by the effective speed of transmission.
RemainingDatatoTransmit -= Convert.ToDouble(GV.GlobalComms.Rows[SpaceNumber]["Speed"]);
// If we have finished transmitting:
if (RemainingDatatoTransmit <= 0)
{
switch (TransType)
{
//Done receiving input data, need to make 2 backups.
case GV.TransmissionType.recInputData:
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.transmitting;
TransType = GV.TransmissionType.transBackups;
BackupsNeeded = GV.BackupsNeeded.BothBackups;
RemainingDatatoTransmit = GV.inputDataSize;
if ((int)GV.GlobalComms.Rows[SpaceNumber]["LocalBackup"] == -1)
{
MessageBox.Show("Primary Backup Vehicle invalid", "Fatal Error",
MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
else
{
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = GV.GlobalComms.Rows[SpaceNumber]["LocalBackup"];
GV.GlobalComms.Rows[(int)GV.GlobalComms.Rows[SpaceNumber]["LocalBackup"]]["Partner"] = SpaceNumber;
}
DataCenter.NotifyPartnerofTransfer((int)GV.GlobalComms.Rows[SpaceNumber]["RandomBackup"],
RemainingDatatoTransmit, GV.TransmissionType.recBackupData, CurrentJob);
break;
// Check to see if both backups are complete. If not, start the second backup.
case GV.TransmissionType.transBackups:
if (BackupsNeeded == GV.BackupsNeeded.BothBackups)
{
BackupsNeeded = GV.BackupsNeeded.RandomBackup;
RemainingDatatoTransmit = GV.inputDataSize;
if ((int)GV.GlobalComms.Rows[SpaceNumber]["RandomBackup"] == -1)
{
MessageBox.Show("Secondary Backup Vehicle invalid", "Fatal Error",
MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
else
{
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = Convert.ToInt32(GV.GlobalComms.Rows[SpaceNumber]["RandomBackup"]);
GV.GlobalComms.Rows[(int)GV.GlobalComms.Rows[SpaceNumber]["RandomBackup"]]["Partner"] = SpaceNumber;
}
DataCenter.NotifyPartnerofTransfer((int)GV.GlobalComms.Rows[SpaceNumber]["RandomBackup"], RemainingDatatoTransmit, GV.TransmissionType.recBackupData, CurrentJob);
}
else if (BackupsNeeded == GV.BackupsNeeded.LocalBackup || BackupsNeeded == GV.BackupsNeeded.RandomBackup)
{
if ((int)GV.GlobalComms.Rows[SpaceNumber]["Time"] > TimeToTransferFinalData + CurrentJob.jobLength)
{
StartMigration = 0;
}
else
{
StartMigration = TimeToTransferVM;
}
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.processing;
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = SpaceNumber;
TransType = GV.TransmissionType.none;
BackupsNeeded = GV.BackupsNeeded.none;
}
else // (BackupsNeeded == GV.BackupsNeeded.none
{
MessageBox.Show("Transmitting backups when none needed.", "Fatal Error",
MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
break;
// Ive offloaded my backup to another vehicle, and am waiting to leave. Set my
// status to unavailable.
case GV.TransmissionType.transBackupCopy:
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.unavailable;
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = SpaceNumber;
break;
// I'm done receiving backup data, set my status to holding
case GV.TransmissionType.recBackupData:
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.holding;
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = SpaceNumber;
TransType = GV.TransmissionType.none;
break;
// I received the backup from a departing vehicle, now I have to hold it until
// the new vehicle arrives.
case GV.TransmissionType.recVM:
if (Convert.ToInt32(GV.GlobalComms.Rows[SpaceNumber]["Primary"]) == -1)
{
//MessageBox.Show("Can't receive VM. Primary is -1");
}
else
{
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.holdingForReturn;
TransType = GV.TransmissionType.none;
RemainingDatatoTransmit = GV.VMSize + CurrentJob.outputDataSize;
}
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = SpaceNumber;
break;
// I am the new car and have received a VM from a backup car. I start
// running the program.
case GV.TransmissionType.recReturnVM:
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.processing;
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = SpaceNumber;
break;
// I am a departing car and have finished transmitting my VM. I become unavailable.
case GV.TransmissionType.transVM:
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.unavailable;
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = SpaceNumber;
break;
// I completed my job! If it's too close to time to leave, I become unavailable.
// Otherwise I set myself idle so that I can be assigned a new job or can become
// a backup for another car.
case GV.TransmissionType.transFinalData:
if ((int)GV.GlobalComms.Rows[SpaceNumber]["Time"] <= GV.tooClose)
{
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.unavailable;
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = SpaceNumber;
}
else
{
GV.GlobalComms.Rows[SpaceNumber]["Status"] = GV.VMStatus.idle;
GV.GlobalComms.Rows[SpaceNumber]["Partner"] = SpaceNumber;
}
// After the job is complete, write out the data to the .csv file. The
// actual write to file takes place in the data center once per seond for
// all cars. This is to help the speed of the simulation.
string OutputString = CurrentJob.jobNumber + ","
+ CurrentJob.StartTime.ToString() + ","
+ GV.currentTime.ToString() + ","
+ CurrentJob.GetJobLength().ToString() + ","
+ (GV.currentTime - CurrentJob.StartTime).TotalSeconds + ","
+ SpaceNumber;
GV.csv.AppendLine(OutputString);
DataCenter.DeleteBackup((int)GV.GlobalComms.Rows[SpaceNumber]["LocalBackup"], (int)GV.GlobalComms.Rows[SpaceNumber]["RandomBackup"]);
GV.GlobalComms.Rows[SpaceNumber]["LocalBackup"] = -1;
GV.GlobalComms.Rows[SpaceNumber]["RandomBackup"] = -1;
GV.GlobalComms.Rows[SpaceNumber]["Primary"] = -1;
// set stop time
break;
default:
break;
}
break;
} // switch on transmission type.
break;
} // switch on VM status
} // Receive