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                 List<Application> apps = getApplications(events);
  62
  63                 for (Application app : apps) {
  64                         boolean appDeployed = false;
  65
  66                         if (manager.getPMs().size() == 0) {
  67                                 PhysicalMachine pm = manager.startPhysicalMachine();
  68                                 boolean enoughResources = pm.checkVM(app.getSize(), app.getRam(), app.getCpu());
  69
  70                                 if (enoughResources) {
  71                                         appDeployed = startApp(pm, app);
  72                                         log.info("Application " + app.toString() + " started on new pm " + pm.getId());
  73                                 } else {
  74                                         log.info("Application " + app.toString() + " cannot be run on pm "
  75                                                         + pm.getId() + ", too little space");
  76                                 }
  77                         } else {
  78                                 // sorting physical machines by resource utilization
  79                                 // (descending)
  80                                 List<PhysicalMachine> sortedPMs = manager.getSortedPMs();
  81                                 Collections.reverse(sortedPMs);
  82
  83                                 for (PhysicalMachine pm : sortedPMs) {
  84
  85                                         boolean enoughResources = pm.checkVM(app.getSize(), app.getRam(), app.getCpu());
  86
  87                                         if (enoughResources) {
  88                                                 appDeployed = startApp(pm, app);
  89                                                 log.info("Application " + app.toString() + " started new vm "
  90                                                                 + pm.getLatestVMID() + " on pm " + pm.getId());
  91                                                 break;
  92                                         }
  93                                 }
  94                                 if (!appDeployed && (manager.getPMs().size() < manager.getMaxPMs())) {
  95
  96                                         PhysicalMachine pm = manager.startPhysicalMachine();
  97                                         boolean enoughResources = pm.checkVM(app.getSize(), app.getRam(), app.getCpu());
  98
  99                                         if (enoughResources) {
 100                                                 appDeployed = startApp(pm, app);
 101                                                 log.info("Application " + app.toString() + " started on new pm "
 102                                                                 + pm.getId());
 103                                         } else {
 104                                                 log.warn("Application " + app.toString() + " cannot be run on pm "
 105                                                                 + pm.getId() + ", too little space");
 106                                         }
 107                                 }
 108                         }
 109                         if (!appDeployed) {
 110                                 if (federation.askToOutsource(app)) {
 111                                         insertOutsourcedStartEvent(currTime + 1, app);
 112                                         appDeployed = true;
 113                                 } else
 114                                         delayedApps.add(app);
 115                         }
 116                         if (!appDeployed)
 117                                 log.warn("Application " + app.toString() + " could not be deployed on any pm");
 118                 }
 119
 120         }
 121
 122         private boolean startApp(PhysicalMachine pm, Application app) {
 123                 VirtualMachine vm = pm.startVirtualMachine(app.getSize(), app.getRam(),
 124                                 app.getCpu(), vmType);
 125                 vm.startApplication(app);
 126                 insertStopEvent(currTime + app.getDuration(), app);
 127                 return true;
 128         }
 129
 130         // sorting applications by amount of resources (descending)
 131         private List<Application> sortApps(LinkedList<SchedulerEvent> events) {
 132                 List<Application> sortedApps = new LinkedList<Application>();
 133                 for (SchedulerEvent evt : events) {
 134                         sortedApps.add(evt.getApp());
 135                 }
 136                 Collections.sort(sortedApps, new ApplicationResourceComparator());
 137                 Collections.reverse(sortedApps);
 138                 return sortedApps;
 139         }
 140
 141         public List<Application> getApplications(LinkedList<SchedulerEvent> events) {
 142                 List<Application> apps = new LinkedList<Application>();
 143                 for(SchedulerEvent evt: events) {
 144                         apps.add(evt.getApp());
 145                 }
 146                 return apps;
 147         }
 148
 149         @Override
 150         protected String getSchedulerType() {
 151                 return SchedulerType.A.toString();
 152         }
 153
 154 }