Ejemplo n.º 1
0
        public static void Submit(ClusterSubmitterArgs clusterArgs, ArgumentCollection applicationArgs)
        {
            CommandArguments cmd = applicationArgs as CommandArguments;

            Helper.CheckCondition <ArgumentException>(cmd != null, "Can only provide command arguments to the cluster submitter");
            Submit(clusterArgs, new DistributableWrapper(cmd));
        }
Ejemplo n.º 2
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        private static v2008R2.IStringCollection GetNodesToUse(ClusterSubmitterArgs clusterArgs, v2008R2.IScheduler scheduler, v2008R2.ISchedulerJob job)
        {
            job.AutoCalculateMax = false;
            job.AutoCalculateMin = false;
            var availableNodes = scheduler.GetNodeList(null, null);

            v2008R2.IStringCollection nodesToUse = scheduler.CreateStringCollection();
            List <string>             nodesFound = new List <string>();

            foreach (var node in availableNodes)
            {
                string nodeName = ((Microsoft.Hpc.Scheduler.SchedulerNode)node).Name;
                if (!clusterArgs.NodeExclusionList.Contains(nodeName))
                {
                    nodesToUse.Add(nodeName);
                }
                else
                {
                    nodesFound.Add(nodeName);
                }
            }
            Helper.CheckCondition(nodesFound.Count != clusterArgs.NodeExclusionList.Count, "not all nodes in exclusion list found: check for typo " + clusterArgs.NodeExclusionList);

            return(nodesToUse);
        }
Ejemplo n.º 3
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        private static JobWaitingParams WaitForJobInternal(ClusterSubmitterArgs clusterArgs)
        {
            v2008R2.ISchedulerJob job = clusterArgs.GetV2Job();
            var jobState = job.State;
            //clusterArgs.JobV2.Refresh();
            //clusterArgs.JobState = clusterArgs.JobV2.State;

            JobWaitingParams jobWaitingParams = new JobWaitingParams
            {
                Job              = job,
                JobState         = jobState,
                ManualResetEvent = new ManualResetEvent(false)
            };


            SetupJobEventHandler(jobWaitingParams);

            int heartBeatPeriod = 60 * 1000; // beat once a minute

            // put in a using statement to guarantee dispose will be called and the timer will be shutdown.
            using (Timer timer = HeartbeatTimer(clusterArgs.JobID, clusterArgs.Cluster, jobWaitingParams, heartBeatPeriod))
            {
                //wait
                jobWaitingParams.Job.Refresh();
                if (!JobIsFinished(jobWaitingParams.Job.State))
                {
                    jobWaitingParams.ManualResetEvent.WaitOne();
                }
                timer.Change(Timeout.Infinite, Timeout.Infinite);   // shutdown the timer
            }
            return(jobWaitingParams);
        }
Ejemplo n.º 4
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        public static void SubmitAndWait(ClusterSubmitterArgs clusterArgs, IDistributable distributableObj, int maxSubmitAfterTasksFail = 0)
        {
            using (ParallelOptionsScope.Suspend())
            {
                int numberOfTries = 0;

retry:

                Submit(clusterArgs, distributableObj);

                JobWaitingParams jobWaitingParams = WaitForJobInternal(clusterArgs);

                if (jobWaitingParams.JobState == v2008R2.Properties.JobState.Canceled)
                {
                    throw new Exception("Job canceled.");
                }
                else if (jobWaitingParams.JobState == v2008R2.Properties.JobState.Failed)
                {
                    if (numberOfTries < maxSubmitAfterTasksFail)
                    {
                        ++numberOfTries;
                        Console.WriteLine("Job failed, trying again...");
                        goto retry;
                    }
                    throw new Exception("Job failed.");
                }
                //HpcLib.HpcLib.CopyFiles(new List<String> { "" }, _remoteTaskOutDir, TASK_OUT_DIR);
            }
        }
Ejemplo n.º 5
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        private static void SubmitInternal(ClusterSubmitterArgs clusterArgs, IDistributable distributableObj)
        {
            lock (_submitterLockObj)  // for now, just let one thread submit at a time.
            {
                if (clusterArgs.Archive != null)
                {
                    MBT.Escience.FileUtils.ArchiveExes(clusterArgs.Archive);
                }

                //ArgumentCollection argsToUse = (ArgumentCollection)applicationArgs.Clone();

                CopyExes(clusterArgs);

                clusterArgs.StdErrDirName = CreateUniqueDirectory(clusterArgs.ExternalRemoteDirectoryName, "Stderr", clusterArgs.Name);
                clusterArgs.StdOutDirName = CreateUniqueDirectory(clusterArgs.ExternalRemoteDirectoryName, "Stdout", clusterArgs.Name);


                if (clusterArgs.CopyInputFiles.Count > 0)
                {
                    CopyInputFiles(clusterArgs.CopyInputFiles, clusterArgs.ExternalRemoteDirectoryName);
                }

                using (ParallelOptionsScope.Suspend())
                {
                    switch (clusterArgs.Version)
                    {
                    case 1:
                        SubmitViaAPI1(clusterArgs, distributableObj);
                        break;

                    case 2:
                        Console.Error.WriteLine("Api2 and 3 are the same. Submitting via Api3.");
                        SubmitViaAPI3(clusterArgs, distributableObj);
                        break;

                    case 3:
                        SubmitViaAPI3(clusterArgs, distributableObj);
                        break;

                    default:
                        throw new NotSupportedException(string.Format("Cluster version {0} is not supported.", clusterArgs.Version));
                    }
                }
                Console.WriteLine("Processed job to cluster {0} with path {1}", clusterArgs.Cluster, clusterArgs.ExternalRemoteDirectoryName);


                Console.WriteLine("Writing log file");
                HpcLibSettings.TryWriteToLog(clusterArgs);
                Console.WriteLine("Writing log entry to cluster directory");
                HpcLibSettings.WriteLogEntryToClusterDirectory(clusterArgs);
                Console.WriteLine("Done");
            }
            return;
        }
Ejemplo n.º 6
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 public LogEntry(ClusterSubmitterArgs clusterArgs)
 {
     Date     = DateTime.Now;
     LocalDir = Environment.CurrentDirectory;
     if (clusterArgs.RelativeDir)
     {
         clusterArgs.Dir         = clusterArgs.ExternalRemoteDirectoryName;
         clusterArgs.RelativeDir = false;
     }
     ClusterArgs = clusterArgs;
 }
Ejemplo n.º 7
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        public static void WriteLogEntryToClusterDirectory(ClusterSubmitterArgs clusterArgs)
        {
            string   directory = clusterArgs.ExternalRemoteDirectoryName;
            string   filename  = LogEntryFileName(clusterArgs.Name);
            LogEntry logEntry  = new LogEntry(clusterArgs);

            System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(typeof(LogEntry));
            using (var writer = File.Create(directory + "\\" + filename))
            {
                serializer.Serialize(writer, logEntry);
            }
        }
Ejemplo n.º 8
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        /// <summary>
        /// Waits for the job specified by clusterArgs to finish. If the state is Canceled or Failed,
        /// will throw an exception. Attempts to connect to the cluster if not already connected.
        /// </summary>
        /// <param name="clusterArgs"></param>
        public static void WaitForJob(ClusterSubmitterArgs clusterArgs)
        {
            JobWaitingParams jobWaitingParams = WaitForJobInternal(clusterArgs);

            if (jobWaitingParams.JobState == v2008R2.Properties.JobState.Canceled)
            {
                throw new Exception("Job canceled.");
            }
            else if (jobWaitingParams.JobState == v2008R2.Properties.JobState.Failed)
            {
                throw new Exception("Job failed.");
            }
        }
Ejemplo n.º 9
0
        /// <summary>
        /// Calls the corresponding Submit function, but waits for the cluster to Finish, Fail, or be Canceled. If the final state is
        /// Finished, returns silently. Otherwise, it throws and Exception. For a description of the other parameters, see Submit().
        /// *** NOTE: ONLY WORKS WITH V2 CLUSTERS. ****
        /// </summary>
        public static ClusterSubmitterArgs SubmitAndWait(ArgumentCollection argumentCollection, int maxSubmitAfterTasksFail = 0)
        {
            if (argumentCollection.PeekOptional <string>("cluster", "help").Equals("help", StringComparison.CurrentCultureIgnoreCase))
            {
                Console.WriteLine("");
                Console.WriteLine(HelpMessage);
                return(null);
            }

            ClusterSubmitterArgs clusterArgs = new ClusterSubmitterArgs(argumentCollection);

            SubmitAndWait(clusterArgs, argumentCollection, maxSubmitAfterTasksFail);
            return(clusterArgs);
        }
Ejemplo n.º 10
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        private static void SubmitViaAPI1(ClusterSubmitterArgs clusterArgs, IDistributable distributableObj)
        {
            Console.WriteLine("Submitting using API version 1");

            v1.ICluster cluster = new v1.Cluster();
            cluster.Connect(clusterArgs.Cluster);


            foreach (v1.ITask task in EnumerateTasks(clusterArgs, distributableObj))
            {
                v1.IJob job = CreateJobApi1(cluster, (v1.JobPriority)clusterArgs.ApiPriority, task, task.Name);
                cluster.QueueJob(job, clusterArgs.Username, clusterArgs.Password, true, 0);
            }
            Console.WriteLine();
        }
Ejemplo n.º 11
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        private static IEnumerable <v1.ITask> EnumerateTasks(ClusterSubmitterArgs clusterArgs, IDistributable distributableObj)
        {
            //bool checkIfValid = ValidateParamsOrNull != null;


            for (int pieceIndex = 0; pieceIndex < clusterArgs.TaskCount; ++pieceIndex)
            {
                if (clusterArgs.TaskRange.Contains(pieceIndex))
                {
                    ArgumentCollection thisTasksArgs;
                    //if (TryCreateTaskArgsAndValidate(args,  pieceIndex.ToString(), out thisTasksArgs))
                    {
                        v1.ITask task = CreateTask(clusterArgs, pieceIndex, distributableObj);
                        yield return(task);
                    }
                }
            }
        }
Ejemplo n.º 12
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        private static v2008R2.ISchedulerTask AddCleanupTaskToJob(ClusterSubmitterArgs clusterArgs, v2008R2.IScheduler scheduler, v2008R2.ISchedulerJob job, IDistributable distributableJob)
        {
            v2008R2.ISchedulerCollection taskList        = job.GetTaskList(scheduler.CreateFilterCollection(), scheduler.CreateSortCollection(), true);
            v2008R2.IStringCollection    dependencyTasks = scheduler.CreateStringCollection();

            if (!clusterArgs.OnlyDoCleanup)
            {
                dependencyTasks.Add(((v2008R2.ISchedulerTask)taskList[0]).Name);
            }
            v2008R2.ISchedulerTask cleanupTask = CreateCleanupTask(job, clusterArgs.ExternalRemoteDirectoryName, clusterArgs.StdErrDirName, clusterArgs.StdOutDirName, "cleanup", true);

            Distribute.Locally local = new Distribute.Locally()
            {
                Cleanup         = true,
                TaskCount       = clusterArgs.TaskCount,
                Tasks           = new RangeCollection(),
                ParallelOptions = new ParallelOptions()
                {
                    MaxDegreeOfParallelism = 1
                }
            };

            Distribute.Distribute distributeExe = new Distribute.Distribute()
            {
                Distributor   = local,
                Distributable = distributableJob
            };

            string exeName = distributableJob is DistributableWrapper ? clusterArgs.ExeName : distributeExe.GetType().Assembly.GetName().Name;

            //args.AddOptionalFlag("cleanup");
            //args.AddOptional("tasks", "empty");
            string taskCommandLine = string.Format("{0}\\{1} {2}", clusterArgs.ExeRelativeDirectoryName, exeName, CreateTaskString(distributeExe, clusterArgs.MinimalCommandLine));

            cleanupTask.CommandLine = taskCommandLine;

            if (!clusterArgs.OnlyDoCleanup)
            {
                cleanupTask.DependsOn = dependencyTasks;
            }
            job.AddTask(cleanupTask);
            return(cleanupTask);
        }
Ejemplo n.º 13
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 private static void CopyExes(ClusterSubmitterArgs clusterArgs)
 {
     //!! why was this removed??
     //var lockObj = CCSLibSettings.KnownClusters[clusterArgs.Cluster]; // use an object that is specific to this cluster.
     //lock (lockObj)  // we should only have one thread trying to copy to the cluster at a time. Esp since copying is smart and will reuse identical exes if they're already there.
     {
         if (true || clusterArgs.ExeRelativeDirectoryName == null)
         {
             clusterArgs.ExeRelativeDirectoryName = HpcLib.CopyExesToCluster(clusterArgs.ExternalRemoteDirectoryName, clusterArgs.Name);
         }
         else
         {
             Console.WriteLine("Using exe directory specified by user: "******"\\" + clusterArgs.ExeRelativeDirectoryName;
             Helper.CheckCondition(Directory.Exists(absoluteExeDir), "Directory {0} does not exist!", absoluteExeDir);
             //string exeRelativeName = "exes\\" + clusterArgs.ExeRelativeDirectoryName;
             //clusterArgs.ExeRelativeDirectoryName = "\"" + exeRelativeName + "\"";
         }
     }
 }
Ejemplo n.º 14
0
 public static void Submit(ClusterSubmitterArgs clusterArgs, IDistributable distributableObj)
 {
     for (int numTries = 0; numTries < clusterArgs.MaxSubmitTries; numTries++)
     {
         try
         {
             SubmitInternal(clusterArgs, distributableObj);
             return;
         }
         catch (Exception exception)
         {
             Console.WriteLine("\n\nError submitting to cluster " + clusterArgs.Cluster + ": " + exception.Message);
             Console.WriteLine("numTry=" + numTries + " of " + clusterArgs.MaxSubmitTries);
             Console.WriteLine(exception.StackTrace);
             Console.WriteLine("\n\nUse -cluster help to see usage.");
             Thread.Sleep(new TimeSpan(0, 10, 0));
         }
     }
     throw new Exception("max number of cluster submitter tries (" + clusterArgs.MaxSubmitTries + ") exceeded");
 }
Ejemplo n.º 15
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        private static v1.ITask CreateTask(ClusterSubmitterArgs clusterArgs, int taskNum, IDistributable distributableObj)
        {
            v1.ITask task = new v1.Task();
            task.WorkDirectory = clusterArgs.InternalRemoteDirectory;

            Distribute.Locally local = new Distribute.Locally()
            {
                Cleanup         = false,
                TaskCount       = clusterArgs.TaskCount,
                ParallelOptions = new ParallelOptions()
                {
                    MaxDegreeOfParallelism = 1
                },
                Tasks = new RangeCollection(taskNum)
            };

            Distribute.Distribute distributeExe = new Distribute.Distribute()
            {
                Distributable = distributableObj,
                Distributor   = local
            };

            string taskString = CreateTaskString(distributeExe, clusterArgs.MinimalCommandLine);
            string exeName    = distributableObj is DistributableWrapper ? clusterArgs.ExeName : distributeExe.GetType().Assembly.GetName().Name;

            string taskCommandLine = string.Format("{0}\\{1} {2}", clusterArgs.ExeRelativeDirectoryName, exeName, taskString);

            task.CommandLine = taskCommandLine;

            task.Name        = Helper.CreateDelimitedString(" ", clusterArgs.Name, taskNum);
            task.IsExclusive = false;
            task.MinimumNumberOfProcessors = 1;
            task.MaximumNumberOfProcessors = 1;

            task.Stderr = string.Format(@"{0}\{1}.txt", clusterArgs.StdErrDirName, taskNum);
            task.Stdout = string.Format(@"{0}\{1}.txt", clusterArgs.StdOutDirName, taskNum);

            task.Runtime = "Infinite";
            return(task);
        }
Ejemplo n.º 16
0
        private static void SubmitViaAPI3(ClusterSubmitterArgs clusterArgs, IDistributable distributableObj)
        {
            Console.WriteLine(string.Format("Connecting to cluster {0} using API version 3 .", clusterArgs.Cluster));

            using (v2008R2.IScheduler scheduler = new v2008R2.Scheduler())
            {
                scheduler.Connect(clusterArgs.Cluster);
                v2008R2.ISchedulerJob job = scheduler.CreateJob();
                job.Name     = clusterArgs.Name;
                job.Priority = (v2008R2.Properties.JobPriority)clusterArgs.ApiPriority;

                if (clusterArgs.JobTemplate != null)
                {
                    Microsoft.Hpc.Scheduler.IStringCollection jobTemplates = scheduler.GetJobTemplateList();
                    string decodedJobTemplate = HttpUtility.UrlDecode(clusterArgs.JobTemplate);
                    if (jobTemplates.Contains(decodedJobTemplate))
                    {
                        job.SetJobTemplate(decodedJobTemplate);
                    }
                    else
                    {
                        Console.WriteLine("Job template '" + decodedJobTemplate + "' does not exist at specified cluster. Existing templates are:");
                        foreach (var template in jobTemplates)
                        {
                            Console.Write("'" + template + "' ");
                        }
                        Console.WriteLine("\nUsing Default job template...");
                    }
                }


                if (clusterArgs.NumCoresPerTask != null)
                {
                    clusterArgs.IsExclusive = false;
                }

                v2008R2.IStringCollection nodesToUse = null;

                if (clusterArgs.NodeExclusionList != null && clusterArgs.NodeExclusionList.Count > 0)
                {
                    nodesToUse = GetNodesToUse(clusterArgs, scheduler, job);
                }
                else if (clusterArgs.NodesToUseList != null && clusterArgs.NodesToUseList.Count > 0)
                {
                    nodesToUse = scheduler.CreateStringCollection();
                    foreach (string nodeName in clusterArgs.NodesToUseList)
                    {
                        nodesToUse.Add(nodeName);
                    }
                }
                else if (clusterArgs.NumCoresPerTask != null)
                {
                    job.AutoCalculateMax = true;
                    job.AutoCalculateMin = true;
                }
                else if (clusterArgs.IsExclusive)
                {
                    job.UnitType = Microsoft.Hpc.Scheduler.Properties.JobUnitType.Node;
                    if (clusterArgs.MinimumNumberOfNodes != null)
                    {
                        job.MaximumNumberOfNodes = clusterArgs.MaximumNumberOfNodes.Value;
                        job.MinimumNumberOfNodes = clusterArgs.MinimumNumberOfNodes.Value;
                    }
                }
                else if (clusterArgs.MinimumNumberOfCores != null)
                {
                    job.MaximumNumberOfCores = clusterArgs.MaximumNumberOfCores.Value;
                    Helper.CheckCondition(clusterArgs.MinimumNumberOfCores != null, "must provide both MinCores and MaxCores, not just one");
                    job.MinimumNumberOfCores = clusterArgs.MinimumNumberOfCores.Value;
                    job.AutoCalculateMax     = false;
                    job.AutoCalculateMin     = false;
                }
                else
                {
                    job.AutoCalculateMax = true;
                    job.AutoCalculateMin = true;
                }


                //bool checkIfValid = ValidateParamsOrNull != null;

                if (!clusterArgs.OnlyDoCleanup)
                {
                    if (clusterArgs.TaskRange.IsContiguous())
                    {
                        if (clusterArgs.TaskRange.LastElement > clusterArgs.TaskCount - 1)
                        {
                            clusterArgs.TaskRange = new RangeCollection(clusterArgs.TaskRange.FirstElement, clusterArgs.TaskCount - 1);
                        }
                        v2008R2.ISchedulerTask task = CreateTask(null, clusterArgs, job, distributableObj, nodesToUse);

                        task.IsParametric = true; // IsParametric is marked as obsolete. But is it necessary to submit to a v2 cluster??

                        //task.Type = TaskType.ParametricSweep;

                        task.StartValue = 0;
                        task.EndValue   = clusterArgs.TaskCount - 1;

                        job.AddTask(task);
                    }
                    else
                    {
                        job.AddTasks(clusterArgs.TaskRange.Select(taskNum => CreateTask((int)taskNum, clusterArgs, job, distributableObj, nodesToUse)).ToArray());
                    }
                }
                else
                {
                    clusterArgs.Cleanup = true;
                }

                v2008R2.ISchedulerTask cleanupTask = null;
                if (clusterArgs.Cleanup)
                {
                    cleanupTask = AddCleanupTaskToJob(clusterArgs, scheduler, job, distributableObj);
                }

                Console.WriteLine("Submitting job.");
                scheduler.SubmitJob(job, null, null);
                clusterArgs.JobID = job.Id;
                Console.WriteLine(job.Name + " submitted.");
            }
        }
Ejemplo n.º 17
0
        /// <summary>
        /// Tries to write to the log file. If no log file is defined, returns false.
        /// </summary>
        public static bool TryWriteToLog(ClusterSubmitterArgs clusterArgs)
        {
            if (!string.IsNullOrEmpty(LogFile))
            {
                FileStream filestream = null;
                try
                {
                    bool exists = File.Exists(LogFile);
                    if (MBT.Escience.FileUtils.TryToOpenFile(LogFile, new TimeSpan(0, 3, 0), FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None, out filestream))
                    {
                        List <LogEntry> logEntries    = exists && filestream.Length > 0 ? LogEntry.LoadEntries(new StreamReader(filestream)) : new List <LogEntry>();
                        LogEntry        newSubmission = new LogEntry(clusterArgs);
                        logEntries.Add(newSubmission);
                        filestream.Position = 0;
                        LogEntry.SaveEntries(logEntries, new StreamWriter(filestream));
                        filestream.Dispose();

                        #region first try
                        //XmlDocument doc = new XmlDocument();
                        //XmlElement root;
                        //if (File.Exists(LogFile))
                        //{
                        //    XmlTextReader reader = new XmlTextReader(LogFile);
                        //    doc.Load(reader);
                        //    reader.Close();
                        //    root = (XmlElement)doc.GetElementsByTagName("SubmissionLog")[0];
                        //}
                        //else
                        //{
                        //    XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", null, null);
                        //    doc.AppendChild(dec);
                        //    root = doc.CreateElement("SubmissionLog");
                        //    doc.AppendChild(root);
                        //}
                        //XmlElement newEntry = new LogEntry(clusterArgs).GetXmlElement(doc);
                        //root.AppendChild(newEntry);

                        //XmlWriterSettings settings = new XmlWriterSettings();
                        //settings.Indent = true;
                        //XmlWriter writer = XmlWriter.Create(LogFile, settings);

                        //doc.WriteContentTo(writer);
                        //writer.Flush();
                        #endregion

                        return(true);
                    }
                }
                catch (System.Xml.XmlException exception)
                {
                    Console.WriteLine(exception);
                    return(false);
                }
                finally
                {
                    if (filestream != null)
                    {
                        filestream.Dispose();
                    }
                }
            }
            return(false);
        }
Ejemplo n.º 18
0
        private static v2008R2.ISchedulerTask CreateTask(int?taskNumber, ClusterSubmitterArgs clusterArgs, v2008R2.ISchedulerJob job, IDistributable distributableObj, v2008R2.IStringCollection nodesToUse)
        {
            Distribute.Locally local = new Distribute.Locally()
            {
                Cleanup         = false,
                TaskCount       = clusterArgs.TaskCount,
                Tasks           = taskNumber.HasValue ? new RangeCollection(taskNumber.Value) : null,
                ParallelOptions = new ParallelOptions()
                {
                    MaxDegreeOfParallelism = 1
                }
            };

            v2008R2.ISchedulerTask task = job.CreateTask();
            if (nodesToUse != null)
            {
                task.RequiredNodes = nodesToUse;
            }
            if (clusterArgs.NumCoresPerTask != null)
            {
                task.MinimumNumberOfCores = clusterArgs.NumCoresPerTask.Value;
                task.MaximumNumberOfCores = clusterArgs.NumCoresPerTask.Value;
                task.MaximumNumberOfNodes = 1;
                local.ParallelOptions.MaxDegreeOfParallelism = clusterArgs.NumCoresPerTask.Value;
            }
            else if (clusterArgs.IsExclusive)
            {
                //task.MinimumNumberOfCores = 1;
                //task.MaximumNumberOfCores = 8;
                //task.MaximumNumberOfNodes = 1;
            }
            task.WorkDirectory = clusterArgs.ExternalRemoteDirectoryName;

            Distribute.Distribute distributeExe = new Distribute.Distribute()
            {
                Distributable = distributableObj,
                Distributor   = local
            };

            string taskArgString = CreateTaskString(distributeExe, clusterArgs.MinimalCommandLine);
            string exeName       = distributeExe.Distributable is DistributableWrapper ? clusterArgs.ExeName : distributeExe.GetType().Assembly.GetName().Name;

            string taskCommandLine = null;

            if (clusterArgs.UseMPI)
            {
                taskCommandLine = string.Format("mpiexec -n {0} {1}\\{2} {3}", clusterArgs.NumCoresPerTask, clusterArgs.ExeRelativeDirectoryName, exeName, taskArgString);
            }
            else
            {
                taskCommandLine = string.Format("{0}\\{1} {2}", clusterArgs.ExeRelativeDirectoryName, exeName, taskArgString);
            }
            task.CommandLine = taskCommandLine;

            string taskNumberAsString = taskNumber.HasValue ? taskNumber.Value.ToString() : "*";

            task.Name           = Helper.CreateDelimitedString(" ", clusterArgs.Name, taskNumberAsString);
            task.StdErrFilePath = string.Format(@"{0}\{1}.txt", clusterArgs.StdErrDirName, taskNumberAsString);
            task.StdOutFilePath = string.Format(@"{0}\{1}.txt", clusterArgs.StdOutDirName, taskNumberAsString);

            if (task.StdErrFilePath.Length >= 160)
            {
                Console.WriteLine("Caution, std error file path is {0} characters, which will probably cause HPC to crash.", task.StdErrFilePath.Length);
            }

            return(task);
        }