src/at/ac/tuwien/lsdc/sched/SchedulerA.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.ActiveApplicationsException;
  13 import at.ac.tuwien.lsdc.exception.VMsRunningException;
  14 import at.ac.tuwien.lsdc.types.Application;
  15 import at.ac.tuwien.lsdc.types.ApplicationResourceComparator;
  16 import at.ac.tuwien.lsdc.types.PhysicalMachine;
  17 import at.ac.tuwien.lsdc.types.ScenarioType;
  18 import at.ac.tuwien.lsdc.types.SchedulerEvent;
  19 import at.ac.tuwien.lsdc.types.SchedulerType;
  20 import at.ac.tuwien.lsdc.types.VirtualMachine;
  21 import at.ac.tuwien.lsdc.types.VirtualMachine.VMType;
  22
  23 public class SchedulerA extends AbstractScheduler {
  24
  25         private static final Logger log = LoggerFactory.getLogger(SchedulerA.class);
  26
  27         public SchedulerA(int numPMs, int numCloudPartners, File schedulerLog, ScenarioType scenario)
  28                         throws IOException {
  29                 super(numPMs, numCloudPartners, schedulerLog, scenario);
  30
  31                 this.vmType = VMType.NonResizable;
  32         }
  33
  34         @Override
  35         protected void handleEndEvents(LinkedList<SchedulerEvent> events) {
  36                 for (SchedulerEvent evt : events) {
  37                         VirtualMachine vm = evt.getApp().getRunningOn();
  38                         vm.stopApplication(evt.getApp());
  39                         PhysicalMachine pm = vm.getRunningOn();
  40                         try {
  41                                 pm.stopVirtualMachine(vm);
  42                                 if (pm.countCurrentlyRunningVMs() == 0) {
  43                                         try {
  44                                                 manager.stopPhysicalMachine(pm.getId());
  45                                         } catch (VMsRunningException e) {
  46                                                 log.warn("PM " + pm.getId() + " could not be stopped, " + e.getMessage());
  47                                         }
  48                                 }
  49                                 log.info("application stopped at timestamp " + currTime + ", " + "vm "
  50                                                 + vm.getPositionOnPM() + ", pm " + pm.getId());
  51                         } catch (ActiveApplicationsException e) {
  52                                 log.warn("VM " + vm.getId() + "could not be stopped, " + e.getMessage());
  53                         }
  54                 }
  55         }
  56
  57         @Override
  58         protected void handleStartEvents(LinkedList<SchedulerEvent> events) {
  59                 // sorting applications by amount of resources (descending)
  60                 List<Application> sortedApps = sortApps(events);
  61
  62                 for (Application app : sortedApps) {
  63                         boolean appDeployed = false;
  64
  65                         if (manager.getPMs().size() == 0) {
  66                                 PhysicalMachine pm = manager.startPhysicalMachine();
  67                                 boolean enoughResources = pm.checkVM(app.getSize(), app.getRam(), app.getCpu());
  68
  69                                 if (enoughResources) {
  70                                         appDeployed = startApp(pm, app);
  71                                         log.info("Application " + app.toString() + " started on new pm " + pm.getId());
  72                                 } else {
  73                                         log.info("Application " + app.toString() + " cannot be run on pm "
  74                                                         + pm.getId() + ", too little space");
  75                                 }
  76                         } else {
  77                                 // sorting physical machines by resource utilization
  78                                 // (descending)
  79                                 List<PhysicalMachine> sortedPMs = manager.getSortedPMs();
  80                                 Collections.reverse(sortedPMs);
  81
  82                                 for (PhysicalMachine pm : sortedPMs) {
  83
  84                                         boolean enoughResources = pm.checkVM(app.getSize(), app.getRam(), app.getCpu());
  85
  86                                         if (enoughResources) {
  87                                                 appDeployed = startApp(pm, app);
  88                                                 log.info("Application " + app.toString() + " started new vm "
  89                                                                 + pm.getLatestVMID() + " on pm " + pm.getId());
  90                                                 break;
  91                                         }
  92                                 }
  93                                 if (!appDeployed && (manager.getPMs().size() < manager.getMaxPMs())) {
  94
  95                                         PhysicalMachine pm = manager.startPhysicalMachine();
  96                                         boolean enoughResources = pm.checkVM(app.getSize(), app.getRam(), app.getCpu());
  97
  98                                         if (enoughResources) {
  99                                                 appDeployed = startApp(pm, app);
 100                                                 log.info("Application " + app.toString() + " started on new pm "
 101                                                                 + pm.getId());
 102                                         } else {
 103                                                 log.warn("Application " + app.toString() + " cannot be run on pm "
 104                                                                 + pm.getId() + ", too little space");
 105                                         }
 106                                 }
 107                         }
 108                         if (!appDeployed) {
 109                                 if (federation.askToOutsource(app)) {
 110                                         insertOutsourcedStartEvent(currTime + 1, app);
 111                                         appDeployed = true;
 112                                 } else
 113                                         delayedApps.add(app);
 114                         }
 115                         if (!appDeployed)
 116                                 log.warn("Application " + app.toString() + " could not be deployed on any pm");
 117                 }
 118
 119         }
 120
 121         private boolean startApp(PhysicalMachine pm, Application app) {
 122                 VirtualMachine vm = pm.startVirtualMachine(app.getSize(), app.getRam(),
 123                                 app.getCpu(), vmType);
 124                 vm.startApplication(app);
 125                 insertStopEvent(currTime + app.getDuration(), app);
 126                 return true;
 127         }
 128
 129         // sorting applications by amount of resources (descending)
 130         private List<Application> sortApps(LinkedList<SchedulerEvent> events) {
 131                 List<Application> sortedApps = new LinkedList<Application>();
 132                 for (SchedulerEvent evt : events) {
 133                         sortedApps.add(evt.getApp());
 134                 }
 135                 Collections.sort(sortedApps, new ApplicationResourceComparator());
 136                 Collections.reverse(sortedApps);
 137                 return sortedApps;
 138         }
 139
 140         @Override
 141         protected String getSchedulerType() {
 142                 return SchedulerType.A.toString();
 143         }
 144
 145 }