src/at/ac/tuwien/lsdc/sched/SchedulerC.java

   1 package at.ac.tuwien.lsdc.sched;
   2
   3 import java.io.File;
   4 import java.io.IOException;
   5 import java.util.Collections;
   6 import java.util.LinkedList;
   7 import java.util.List;
   8
   9 import org.slf4j.Logger;
  10 import org.slf4j.LoggerFactory;
  11
  12 import at.ac.tuwien.lsdc.exception.OutOfPMsException;
  13 import at.ac.tuwien.lsdc.exception.VMResizeException;
  14 import at.ac.tuwien.lsdc.types.Application;
  15 import at.ac.tuwien.lsdc.types.PhysicalMachine;
  16 import at.ac.tuwien.lsdc.types.ScenarioType;
  17 import at.ac.tuwien.lsdc.types.SchedulerEvent;
  18 import at.ac.tuwien.lsdc.types.SchedulerType;
  19 import at.ac.tuwien.lsdc.types.VirtualMachine;
  20 import at.ac.tuwien.lsdc.types.VirtualMachine.VMType;
  21
  22 public class SchedulerC extends AbstractSchedulerWithMigration {
  23
  24         private static final Logger LOG = LoggerFactory.getLogger(SchedulerC.class);
  25
  26         public SchedulerC(int numPMs, int numCloudPartners, File schedulerLog, ScenarioType scenario)
  27                         throws IOException {
  28                 super(numPMs, numCloudPartners, schedulerLog, scenario);
  29
  30                 this.vmType = VMType.NonResizable;
  31         }
  32
  33         @Override
  34         protected boolean deployApp(VirtualMachine vm, Application app) {
  35                 boolean deployed = false;
  36                 if (!vm.enoughResources(app))
  37                         return false;
  38
  39                 deployed = vm.startApplication(app);
  40                 if (deployed)
  41                         app.setRunningOn(vm);
  42                 return deployed;
  43         }
  44
  45         /**
  46          * Cleanup completed apps. If an VM becomes empty, shut down VM + PM.
  47          *
  48          * @param events list of all events that happened in this timeslot.
  49          */
  50         @Override
  51         protected void handleEndEvents(LinkedList<SchedulerEvent> events) {
  52                 LOG.debug("stopApps():" + events);
  53                 for (SchedulerEvent evt : events) {
  54                         VirtualMachine vm = evt.getApp().getRunningOn();
  55                         evt.getApp().setRunningOn(null);
  56                         vm.stopApplication(evt.getApp());
  57
  58                         if (vm.getApplications().size() == 0) {
  59                                 PhysicalMachine pm = vm.getRunningOn();
  60                                 pm.stopVirtualMachine(vm);
  61                                 manager.stopPhysicalMachine(pm.getId());
  62                         }
  63                 }
  64         }
  65
  66
  67         /**
  68          * Try to start all Apps. If not enough space start another PM, if not possible,
  69          * delay start.
  70          *
  71          * @param events list of all events that happened in this timeslot.
  72          */
  73         @Override
  74         protected void handleStartEvents(LinkedList<SchedulerEvent> events) {
  75                 LOG.debug("startApps():" + events);
  76                 boolean deployed = false;
  77                 for (SchedulerEvent evt : events) {
  78                         deployed = false;
  79                         VirtualMachine vm = null;
  80                         List<PhysicalMachine> sortedPMs = manager.getSortedPMs();
  81                         Collections.reverse(sortedPMs);
  82                         for (PhysicalMachine pm : sortedPMs) {
  83                                 if (pm.isRunning() && (pm.countCurrentlyRunningVMs() > 0)) {
  84                                         vm = pm.getVirtualMachines().values().iterator().next();
  85                                         deployed = deployApp(vm, evt.getApp());
  86                                         if (deployed)
  87                                                 break;
  88                                 }
  89                         }
  90                         if (!deployed) {
  91                                 try {
  92                                         vm = manager.startPhysicalMachine().startVirtualMachine(evt.getApp().getSize(),
  93                                                         evt.getApp().getRam(), evt.getApp().getCpu(), vmType);
  94                                         deployed = deployApp(vm, evt.getApp());
  95                                 } catch (OutOfPMsException e) {
  96                                         if (federation.askToOutsource(evt.getApp())) {
  97                                                 insertOutsourcedStartEvent(currTime + 1, evt.getApp());
  98                                         } else {
  99                                                 LOG.info("delaying the start of:" + evt.getApp());
 100                                                 delayedApps.add(evt.getApp());
 101                                                 return;
 102                                         }
 103                                 }
 104                         }
 105                         if (deployed)
 106                                 insertStopEvent(currTime + evt.getApp().getDuration(), evt.getApp());
 107                 }
 108         }
 109
 110         @Override
 111         protected String getSchedulerType() {
 112                 return SchedulerType.C.toString();
 113         }
 114
 115 }