Examples with RelocatableVM org.btrplace.scheduler.choco.transition.RelocatableVM used on opensource projects

Example 6 with RelocatableVM

use of org.btrplace.scheduler.choco.transition.RelocatableVM in project scheduler by btrplace.

the class CMinMTTR method injectPlacementHeuristic.

private void injectPlacementHeuristic(ReconfigurationProblem p, Parameters ps, IntVar cost) {
    List<CShareableResource> rcs = rp.getSourceModel().getViews().stream().filter(v -> v instanceof ShareableResource).map(v -> (CShareableResource) rp.getRequiredView(v.getIdentifier())).collect(Collectors.toList());
    useResources = !rcs.isEmpty();
    Model mo = p.getSourceModel();
    Mapping map = mo.getMapping();
    OnStableNodeFirst schedHeuristic = new OnStableNodeFirst(p);
    // Get the VMs to place
    Set<VM> onBadNodes = new HashSet<>(p.getManageableVMs());
    // Get the VMs that runs and have a pretty low chances to move
    Set<VM> onGoodNodes = map.getRunningVMs(map.getOnlineNodes());
    onGoodNodes.removeAll(onBadNodes);
    List<VMTransition> goodActions = p.getVMActions(onGoodNodes);
    List<VMTransition> badActions = p.getVMActions(onBadNodes);
    Solver s = p.getSolver();
    // Get the VMs to move for exclusion issue
    Set<VM> vmsToExclude = new HashSet<>(p.getManageableVMs());
    for (Iterator<VM> ite = vmsToExclude.iterator(); ite.hasNext(); ) {
        VM vm = ite.next();
        if (!(map.isRunning(vm) && p.getFutureRunningVMs().contains(vm))) {
            ite.remove();
        }
    }
    List<AbstractStrategy<?>> strategies = new ArrayList<>();
    Map<IntVar, VM> pla = VMPlacementUtils.makePlacementMap(p);
    if (!vmsToExclude.isEmpty()) {
        List<VMTransition> actions = new LinkedList<>();
        // Get all the involved slices
        for (VM vm : vmsToExclude) {
            if (p.getFutureRunningVMs().contains(vm)) {
                actions.add(p.getVMAction(vm));
            }
        }
        placeVMs(ps, strategies, actions, schedHeuristic, pla);
    }
    TObjectIntMap<VM> costs = CShareableResource.getWeights(rp, rcs);
    badActions.sort((v2, v1) -> costs.get(v1.getVM()) - costs.get(v2.getVM()));
    goodActions.sort((v2, v1) -> costs.get(v1.getVM()) - costs.get(v2.getVM()));
    placeVMs(ps, strategies, badActions, schedHeuristic, pla);
    placeVMs(ps, strategies, goodActions, schedHeuristic, pla);
    // Reinstantations. Try to reinstantiate first
    List<IntVar> migs = new ArrayList<>();
    for (VMTransition t : rp.getVMActions()) {
        if (t instanceof RelocatableVM) {
            migs.add(((RelocatableVM) t).getRelocationMethod());
        }
    }
    strategies.add(Search.intVarSearch(new FirstFail(rp.getModel()), new IntDomainMax(), migs.toArray(new IntVar[migs.size()])));
    if (!p.getNodeActions().isEmpty()) {
        // Boot some nodes if needed
        IntVar[] starts = p.getNodeActions().stream().map(Transition::getStart).toArray(IntVar[]::new);
        strategies.add(new IntStrategy(starts, new FirstFail(rp.getModel()), new IntDomainMin()));
    }
    // /SCHEDULING PROBLEM
    MovementGraph gr = new MovementGraph(rp);
    IntVar[] starts = dSlices(rp.getVMActions()).map(Slice::getStart).filter(v -> !v.isInstantiated()).toArray(IntVar[]::new);
    strategies.add(new IntStrategy(starts, new StartOnLeafNodes(rp, gr), new IntDomainMin()));
    strategies.add(new IntStrategy(schedHeuristic.getScope(), schedHeuristic, new IntDomainMin()));
    IntVar[] ends = rp.getVMActions().stream().map(Transition::getEnd).filter(v -> !v.isInstantiated()).toArray(IntVar[]::new);
    strategies.add(Search.intVarSearch(new MyInputOrder<>(s), new IntDomainMin(), ends));
    // At this stage only it matters to plug the cost constraints
    strategies.add(new IntStrategy(new IntVar[] { p.getEnd(), cost }, new MyInputOrder<>(s, this), new IntDomainMin()));
    s.setSearch(new StrategiesSequencer(s.getEnvironment(), strategies.toArray(new AbstractStrategy[strategies.size()])));
}

Example 7 with RelocatableVM

use of org.btrplace.scheduler.choco.transition.RelocatableVM in project scheduler by btrplace.

the class CNoDelay method inject.

@Override
public boolean inject(Parameters ps, ReconfigurationProblem rp) {
    VM v = noDelay.getInvolvedVMs().iterator().next();
    // For each vm involved in the constraint
    VMTransition vt = rp.getVMAction(v);
    // Get the VMTransition start time
    // Add the constraint "start = 0" to the solver
    Slice d = vt.getDSlice();
    if (d == null) {
        return true;
    }
    if (!(vt instanceof RelocatableVM)) {
        try {
            d.getStart().instantiateTo(0, Cause.Null);
        } catch (ContradictionException ex) {
            rp.getLogger().debug("Unable to prevent any delay on '" + v + "'", ex);
            return false;
        }
    } else {
        Constraint c = rp.getModel().arithm(d.getStart(), "=", 0);
        BoolVar move = ((RelocatableVM) vt).isStaying().not();
        ChocoUtils.postImplies(rp, move, c);
    }
    return true;
}

Example 8 with RelocatableVM

use of org.btrplace.scheduler.choco.transition.RelocatableVM in project scheduler by btrplace.

the class CNetwork method addLinkConstraints.

/**
 * Add the cumulative constraints for each link.
 *
 * Full-duplex links are considered, two cumulative constraints are defined per link by looking at
 * the migration direction for each link on the migration path.
 *
 * @param rp the reconfiguration problem
 */
private void addLinkConstraints(ReconfigurationProblem rp) {
    // Links limitation
    List<Task> tasksListUp = new ArrayList<>();
    List<Task> tasksListDown = new ArrayList<>();
    List<IntVar> heightsListUp = new ArrayList<>();
    List<IntVar> heightsListDown = new ArrayList<>();
    for (Link l : net.getLinks()) {
        for (VM vm : rp.getVMs()) {
            VMTransition a = rp.getVMAction(vm);
            if (a instanceof RelocatableVM && !a.getDSlice().getHoster().isInstantiatedTo(a.getCSlice().getHoster().getValue())) {
                Node src = source.getMapping().getVMLocation(vm);
                Node dst = rp.getNode(a.getDSlice().getHoster().getValue());
                List<Link> path = net.getRouting().getPath(src, dst);
                // Check first if the link is on migration path
                if (path.contains(l)) {
                    // Get link direction
                    LinkDirection linkDirection = net.getRouting().getLinkDirection(src, dst, l);
                    // UpLink
                    if (linkDirection == LinkDirection.UPLINK) {
                        tasksListUp.add(((RelocatableVM) a).getMigrationTask());
                        heightsListUp.add(((RelocatableVM) a).getBandwidth());
                    } else // DownLink
                    {
                        tasksListDown.add(((RelocatableVM) a).getMigrationTask());
                        heightsListDown.add(((RelocatableVM) a).getBandwidth());
                    }
                }
            }
        }
        if (!tasksListUp.isEmpty()) {
            // Post the cumulative constraint for the current UpLink
            csp.post(csp.cumulative(tasksListUp.toArray(new Task[tasksListUp.size()]), heightsListUp.toArray(new IntVar[heightsListUp.size()]), csp.intVar(l.getCapacity()), true));
            tasksListUp.clear();
            heightsListUp.clear();
        }
        if (!tasksListDown.isEmpty()) {
            // Post the cumulative constraint for the current DownLink
            csp.post(csp.cumulative(tasksListDown.toArray(new Task[tasksListDown.size()]), heightsListDown.toArray(new IntVar[heightsListDown.size()]), csp.intVar(l.getCapacity()), true));
            tasksListDown.clear();
            heightsListDown.clear();
        }
    }
}

Example 9 with RelocatableVM

use of org.btrplace.scheduler.choco.transition.RelocatableVM in project scheduler by btrplace.

the class CNetwork method addSwitchConstraints.

/**
 * Add the cumulative constraints for each blocking switch (having limited capacity)
 *
 * @param rp the reconfiguration problem
 */
private void addSwitchConstraints(ReconfigurationProblem rp) {
    // Switches capacity limitation
    List<Task> tasksList = new ArrayList<>();
    List<IntVar> heightsList = new ArrayList<>();
    for (Switch sw : net.getSwitches()) {
        // Only if the capacity is limited
        if (sw.getCapacity() != Integer.MAX_VALUE) {
            for (VM vm : rp.getVMs()) {
                VMTransition a = rp.getVMAction(vm);
                if (a != null && a instanceof RelocatableVM) {
                    if (a.getDSlice().getHoster().isInstantiated()) {
                        if (a.getCSlice().getHoster().getValue() != a.getDSlice().getHoster().getValue()) {
                            Node src = source.getMapping().getVMLocation(vm);
                            Node dst = rp.getNode(a.getDSlice().getHoster().getValue());
                            if (!Collections.disjoint(net.getConnectedLinks(sw), net.getRouting().getPath(src, dst))) {
                                tasksList.add(new Task(a.getStart(), a.getDuration(), a.getEnd()));
                                heightsList.add(((RelocatableVM) a).getBandwidth());
                            }
                        }
                    }
                }
            }
            if (!tasksList.isEmpty()) {
                // Post the cumulative constraint for the current switch
                csp.post(csp.cumulative(tasksList.toArray(new Task[tasksList.size()]), heightsList.toArray(new IntVar[heightsList.size()]), csp.intVar(sw.getCapacity()), true));
                tasksList.clear();
                heightsList.clear();
            }
        }
    }
}

Example 10 with RelocatableVM

use of org.btrplace.scheduler.choco.transition.RelocatableVM in project scheduler by btrplace.

the class CNetwork method beforeSolve.

@Override
public boolean beforeSolve(ReconfigurationProblem rp) throws SchedulerException {
    Model mo = rp.getSourceModel();
    Attributes attrs = mo.getAttributes();
    // Pre-compute duration and bandwidth for each VM migration
    for (VMTransition migration : rp.getVMActions()) {
        if (!(migration instanceof RelocatableVM)) {
            continue;
        }
        // Get vars from migration
        VM vm = migration.getVM();
        IntVar bandwidth = ((RelocatableVM) migration).getBandwidth();
        IntVar duration = migration.getDuration();
        Node src = rp.getSourceModel().getMapping().getVMLocation(vm);
        // Try to get the destination node
        Node dst;
        if (!migration.getDSlice().getHoster().isInstantiated()) {
            throw new SchedulerModelingException(null, "Destination node for VM '" + vm + "' should be known !");
        }
        if (!mo.getAttributes().isSet(vm, "memUsed")) {
            throw new SchedulerModelingException(null, "Unable to retrieve 'memUsed' attribute for the vm '" + vm + "'");
        }
        dst = rp.getNode(migration.getDSlice().getHoster().getValue());
        if (src.equals(dst)) {
            try {
                ((RelocatableVM) migration).getBandwidth().instantiateTo(0, Cause.Null);
                continue;
            } catch (ContradictionException e) {
                rp.getLogger().debug("Contradiction exception when trying to instantiate bandwidth and " + " duration variables for " + vm + " migration", e);
                return false;
            }
        }
        // Get attribute vars
        int memUsed = attrs.get(vm, "memUsed", -1);
        // Get VM memory activity attributes if defined, otherwise set an idle workload on the VM
        // Minimal observed value on idle VM
        double hotDirtySize = attrs.get(vm, "hotDirtySize", 5.0);
        // Minimal observed value on idle VM
        double hotDirtyDuration = attrs.get(vm, "hotDirtyDuration", 2.0);
        double coldDirtyRate = attrs.get(vm, "coldDirtyRate", 0.0);
        // Get the maximal bandwidth available on the migration path
        int maxBW = net.getRouting().getMaxBW(src, dst);
        // Compute the duration related to each enumerated bandwidth
        double durationMin;
        double durationColdPages;
        double durationHotPages;
        double durationTotal;
        // Cheat a bit, real is less than theoretical (8->9)
        double bandwidthOctet = maxBW / 9.0;
        // Estimate the duration for the current bandwidth
        durationMin = memUsed / bandwidthOctet;
        if (durationMin > hotDirtyDuration) {
            durationColdPages = (hotDirtySize + (durationMin - hotDirtyDuration) * coldDirtyRate) / (bandwidthOctet - coldDirtyRate);
            durationHotPages = (hotDirtySize / bandwidthOctet * ((hotDirtySize / hotDirtyDuration) / (bandwidthOctet - (hotDirtySize / hotDirtyDuration))));
            durationTotal = durationMin + durationColdPages + durationHotPages;
        } else {
            durationTotal = durationMin + (((hotDirtySize / hotDirtyDuration) * durationMin) / (bandwidthOctet - (hotDirtySize / hotDirtyDuration)));
        }
        // Instantiate the computed bandwidth and duration
        try {
            // prevent from a 0 duration when the memory usage is very low
            int dd = (int) Math.max(1, Math.round(durationTotal));
            duration.instantiateTo(dd, Cause.Null);
            bandwidth.instantiateTo(maxBW, Cause.Null);
        } catch (ContradictionException e) {
            rp.getLogger().debug("Contradiction exception when trying to instantiate bandwidth and " + " duration variables for " + vm + " migration: ", e);
            return false;
        }
    }
    // Add links and switches constraints
    addLinkConstraints(rp);
    addSwitchConstraints(rp);
    return true;
}