// This method runs DDT tool with specific parameters on remote server using WMI
public static void Runddtremotely(ServerConnectionCredentials serverCreds, DDTParameters ddtParameters, CancellationToken token)
{
string remotePath = "\\\\" + serverCreds.IP + "\\" + HelperMethods.separateVolumeAndFolder(ddtParameters.Filepath, HelperMethods.FilepathParts.volume)
+ "$\\" + HelperMethods.separateVolumeAndFolder(ddtParameters.Filepath, HelperMethods.FilepathParts.folder);
WMIKillDDT(serverCreds);
CopyDDTtoRemoteMachine(serverCreds);
Logger.Log("Data generation started on remote server " + serverCreds.IP, Logger.LogLevel.Info, serverCreds.IP);
while (true)
{
if (token.IsCancellationRequested)
{
Logger.Log("DDT operation has been canceled by user", Logger.LogLevel.Info, serverCreds.IP);
break;
}
cleanFilepathRemotely(serverCreds, remotePath);
WMIRunDDT(serverCreds, ddtParameters);
Thread.Sleep(ddtParameters.Interval * 60000);
}
}
// This method used to initiate start of DDT on remote machine
public static void StartDDT(ListView listview, List<Server> serversList, DDTParameters ddtparameters)
{
var selectedServers = listview.Items.Cast<ListViewItem>().Where(item => item.Checked).ToList(); // Creating list of selected servers
for (int x = 0; x < selectedServers.Count; x++)
{
for (int y = 0; y < serversList.Count; y++)
{
if (selectedServers[x].SubItems[1].Text == serversList[y].ServerCredentials.IP)
{
int index = y;
if (serversList[y].Task != null)
{
serversList[y].CTS.Cancel();
}
serversList[y].DdtStatus = Server.DDTStatus.Running;
serversList[y].CTS = new CancellationTokenSource();
serversList[y].DdtParameters = ddtparameters;
serversList[y].Task = new Task(() => serversList[index].Runddt());
serversList[y].Task.Start();
}
}
}
}
private void btn_startDDT_Click(object sender, EventArgs e)
{
ddtParameters = new DDTParameters()
{
Filesize = Convert.ToInt32(tb_Size.Text),
Compression = Convert.ToInt32(tb_Compression.Text),
Interval = Convert.ToInt32(tb_Interval.Text),
Filepath = tb_Path.Text
};
ddtParameters.SerizalizeDDTParamsToFile();
// Start DDT for selected servers with specific parameters
DDTWrapper.StartDDT(lv_AgentsList,
ServerWrapper.serversList,
ddtParameters);
// Update ListView
ServerWrapper.UpdateListView(lv_AgentsList, lbl_ChangeRateValue, lbl_totalAgentsRunningValue);
}
// This methdo starts DDT on remote machine using WMI
public static void WMIRunDDT(ServerConnectionCredentials serverCreds, DDTParameters ddtParameters)
{
var seed = new Random().Next();
object[] processToTun = { @"C:\DDT\ddt.exe op=write threads=1 filename=" + ddtParameters.Filepath + seed + " filesize=" + ddtParameters.Filesize
+ " blocksize=512 dup-percentage=" + ddtParameters.Compression + " buffering=direct io=sequential seed=" + seed + " no-ddt-hdr=yes" };
ConnectionOptions options = new ConnectionOptions();
options.Username = serverCreds.Username;
options.Password = serverCreds.Password;
ManagementScope scope = new ManagementScope("\\\\" + serverCreds.IP + "\\root\\cimv2", options);
ManagementClass theClass = new ManagementClass(scope, new ManagementPath("Win32_Process"), new ObjectGetOptions());
int retryCount = 0;
while (true)
{
try
{
theClass.InvokeMethod("Create", processToTun);
break;
}
catch (COMException e)
{
if (retryCount < 3)
{
retryCount++;
}
else
{
Logger.LogError("Starting DDT on remote machine failed with:", serverCreds.IP, e);
throw;
}
}
}
}
