Examples with Precedence org.btrplace.model.constraint.migration.Precedence used on opensource projects

Example 1 with Precedence

use of org.btrplace.model.constraint.migration.Precedence in project scheduler by btrplace.

the class AdvancedMigScheduling method run.

@Override
public void run() {
    Model mo = makeModel();
    // Create, define, and attach CPU and Mem resource decorators for nodes and VMs
    int memSrc = 8;
    int cpuSrc = 4;
    int memDst = 16;
    int cpuDst = 8;
    ShareableResource rcMem = new ShareableResource("mem", 0, 8);
    ShareableResource rcCPU = new ShareableResource("cpu", 0, 4);
    // VMs resources consumption
    // Nodes resources capacity
    rcMem.setCapacity(srcNode1, memSrc).setCapacity(srcNode2, memSrc).setCapacity(srcNode3, memSrc).setCapacity(srcNode4, memSrc).setCapacity(dstNode1, memDst).setCapacity(dstNode2, memDst);
    rcCPU.setCapacity(srcNode1, cpuSrc).setCapacity(srcNode2, cpuSrc).setCapacity(srcNode3, cpuSrc).setCapacity(srcNode4, cpuSrc).setCapacity(dstNode1, cpuDst).setCapacity(dstNode2, cpuDst);
    mo.attach(rcMem);
    mo.attach(rcCPU);
    // Set VM attributes 'hot dirty page size', 'hot dirty page duration', and 'cold dirty pages rate'
    // to simulate a memory intensive workload equivalent to "stress --vm 1000 --bytes 50K"
    int vmHds = 56;
    int vmHdd = 2;
    double vmCdr = 22.6;
    // vm0 is an 'idle' VM (with no special memory activity) but still consumes 2 GiB of memory
    mo.getAttributes().put(vm0, "memUsed", 2000);
    // vm1 is an 'idle' VM (with no special memory activity) but still consumes 4 GiB of memory
    mo.getAttributes().put(vm1, "memUsed", 3000);
    // vm2 consumes 4 GiB memory and has a memory intensive workload
    mo.getAttributes().put(vm2, "memUsed", 4000);
    mo.getAttributes().put(vm2, "hotDirtySize", vmHds);
    mo.getAttributes().put(vm2, "hotDirtyDuration", vmHdd);
    mo.getAttributes().put(vm2, "coldDirtyRate", vmCdr);
    // vm3 consumes 6 GiB memory and has a memory intensive workload
    mo.getAttributes().put(vm3, "memUsed", 5000);
    mo.getAttributes().put(vm3, "hotDirtySize", vmHds);
    mo.getAttributes().put(vm3, "hotDirtyDuration", vmHdd);
    mo.getAttributes().put(vm3, "coldDirtyRate", vmCdr);
    // Attach a network view
    Network net = new Network();
    mo.attach(net);
    Switch swMain = net.newSwitch(30000);
    net.connect(10000, swMain, srcNode1, srcNode2, srcNode3, srcNode4);
    // The destination nodes have twice the bandwidth of source nodes
    net.connect(20000, swMain, dstNode1, dstNode2);
    // Create constraints
    List<SatConstraint> cstrs = new ArrayList<>();
    // We want to boot the destination nodes
    cstrs.addAll(Online.newOnline(Arrays.asList(dstNode1, dstNode2)));
    // We want to shutdown the source nodes
    cstrs.addAll(Offline.newOffline(Arrays.asList(srcNode1, srcNode2, srcNode3, srcNode4)));
    // Try to solve as is, and show the computed plan
    solve(mo, cstrs);
    /**
     ******* Add some migrations scheduling constraints ********
     */
    // We want vm0 and vm1 migrations to terminate at the same time
    cstrs.add(new Sync(vm0, vm1));
    // We want to serialize the migrations of vm1, vm2, and vm3
    cstrs.add(new Serialize(new HashSet<>(Arrays.asList(vm1, vm2, vm3))));
    // We want vm0 migration terminate before vm2 start to migrate
    cstrs.add(new Precedence(vm1, vm2));
    // We want vm3 migration terminate before 10s
    cstrs.add(new Deadline(vm3, "+0:0:10"));
    // Try to solve, and show the computed plan
    solve(mo, cstrs);
}

Example 2 with Precedence

use of org.btrplace.model.constraint.migration.Precedence in project scheduler by btrplace.

the class PrecedenceConverterTest method testViables.

@Test
public void testViables() throws JSONConverterException {
    Model mo = new DefaultModel();
    ConstraintsConverter conv = new ConstraintsConverter();
    conv.register(new PrecedenceConverter());
    Precedence d = new Precedence(mo.newVM(), mo.newVM());
    Assert.assertEquals(conv.fromJSON(mo, conv.toJSON(d)), d);
    System.out.println(conv.toJSON(d));
}

Example 3 with Precedence

use of org.btrplace.model.constraint.migration.Precedence in project scheduler by btrplace.

the class CPrecedenceTest method testOk.

@Test
public void testOk() throws SchedulerException {
    // New default model
    Model mo = new DefaultModel();
    Mapping ma = mo.getMapping();
    // Create and boot 2 source nodes and 1 destination node
    Node srcNode1 = mo.newNode(), srcNode2 = mo.newNode(), dstNode = mo.newNode();
    ma.addOnlineNode(srcNode1);
    ma.addOnlineNode(srcNode2);
    ma.addOnlineNode(dstNode);
    // Attach a network view
    Network net = new Network();
    mo.attach(net);
    // Connect the nodes through a main non-blocking switch
    // The destination node have twice the bandwidth of source nodes
    Switch swMain = net.newSwitch();
    net.connect(1000, swMain, srcNode1, srcNode2);
    net.connect(2000, swMain, dstNode);
    // Create and host 1 VM per source node
    VM vm1 = mo.newVM();
    VM vm2 = mo.newVM();
    ma.addRunningVM(vm1, srcNode1);
    ma.addRunningVM(vm2, srcNode2);
    // Attach CPU and Mem resource views and assign nodes capacity and VMs consumption
    int mem_vm = 8, cpu_vm = 4, mem_src = 8, cpu_src = 4, mem_dst = 16, cpu_dst = 8;
    ShareableResource rcMem = new ShareableResource("mem", 0, 0), rcCPU = new ShareableResource("cpu", 0, 0);
    mo.attach(rcMem);
    mo.attach(rcCPU);
    // VMs
    rcMem.setConsumption(vm1, mem_vm).setConsumption(vm2, mem_vm);
    rcCPU.setConsumption(vm1, cpu_vm).setConsumption(vm2, cpu_vm);
    // Nodes
    rcMem.setCapacity(srcNode1, mem_src).setCapacity(srcNode2, mem_src).setCapacity(dstNode, mem_dst);
    rcCPU.setCapacity(srcNode1, cpu_src).setCapacity(srcNode2, cpu_src).setCapacity(dstNode, cpu_dst);
    // Set VM attributes 'memory used', 'hot dirty page size', 'hot dirty page duration' and 'cold dirty pages rate'
    int vm_mu = 6000, vm_mds = 46, vm_mdd = 2;
    double vm_cdr = 23.6;
    // vm1 is an 'idle' VM (with no special memory activity) but still consumes 6 GiB of memory
    mo.getAttributes().put(vm1, "memUsed", vm_mu);
    // vm2 consumes 6 GiB memory and has a memory intensive workload equivalent to "stress --vm 1000 --bytes 50K"
    // VM with a workload
    mo.getAttributes().put(vm2, "memUsed", vm_mu);
    mo.getAttributes().put(vm2, "hotDirtySize", vm_mds);
    mo.getAttributes().put(vm2, "hotDirtyDuration", vm_mdd);
    mo.getAttributes().put(vm2, "coldDirtyRate", vm_cdr);
    // Create constraints
    List<SatConstraint> cstrs = new ArrayList<>();
    // Placement constraints, we want to shutdown the source nodes to force the migration to destination nodes
    cstrs.add(new Offline(srcNode1));
    cstrs.add(new Offline(srcNode2));
    // MIGRATE VM2 BEFORE VM1
    Precedence prec = new Precedence(vm2, vm1);
    cstrs.add(prec);
    // Solve it using the Min Max Time To Repair Migration scheduling oriented objective
    ReconfigurationPlan p = new DefaultChocoScheduler().solve(mo, cstrs, new MinMTTRMig());
    Assert.assertNotNull(p);
    // Check if the precedence constraint is respected
    Action mig1 = p.getActions().stream().filter(s -> s instanceof MigrateVM && ((MigrateVM) s).getVM().equals(vm1)).findAny().get();
    Action mig2 = p.getActions().stream().filter(s -> s instanceof MigrateVM && ((MigrateVM) s).getVM().equals(vm2)).findAny().get();
    Assert.assertTrue(mig1.getStart() >= mig2.getEnd());
    // TODO: use methods on PrecedenceChecker to verify that the migrations are in the expected order ?
    Assert.assertTrue(prec.isSatisfied(p));
}