Example #1
0
func (vg *VolumeGrowth) grow(topo *topology.Topology, vid storage.VolumeId, repType storage.ReplicationType, servers ...*topology.DataNode) error {
	for _, server := range servers {
		if err := operation.AllocateVolume(server, vid, repType); err == nil {
			vi := storage.VolumeInfo{Id: vid, Size: 0, RepType: repType}
			server.AddOrUpdateVolume(vi)
			topo.RegisterVolumeLayout(&vi, server)
			fmt.Println("Created Volume", vid, "on", server)
		} else {
			fmt.Println("Failed to assign", vid, "to", servers)
			return errors.New("Failed to assign " + vid.String())
		}
	}
	return nil
}
Example #2
0
func (vg *VolumeGrowth) GrowByCountAndType(count int, repType storage.ReplicationType, topo *topology.Topology) (counter int, err error) {
	counter = 0
	switch repType {
	case storage.Copy000:
		for i := 0; i < count; i++ {
			if ok, server, vid := topo.RandomlyReserveOneVolume(); ok {
				if err = vg.grow(topo, *vid, repType, server); err == nil {
					counter++
				}
			}
		}
	case storage.Copy001:
		for i := 0; i < count; i++ {
			//randomly pick one server, and then choose from the same rack
			if ok, server1, vid := topo.RandomlyReserveOneVolume(); ok {
				rack := server1.Parent()
				exclusion := make(map[string]topology.Node)
				exclusion[server1.String()] = server1
				newNodeList := topology.NewNodeList(rack.Children(), exclusion)
				if newNodeList.FreeSpace() > 0 {
					if ok2, server2 := newNodeList.ReserveOneVolume(rand.Intn(newNodeList.FreeSpace()), *vid); ok2 {
						if err = vg.grow(topo, *vid, repType, server1, server2); err == nil {
							counter++
						}
					}
				}
			}
		}
	case storage.Copy010:
		for i := 0; i < count; i++ {
			//randomly pick one server, and then choose from the same rack
			if ok, server1, vid := topo.RandomlyReserveOneVolume(); ok {
				rack := server1.Parent()
				dc := rack.Parent()
				exclusion := make(map[string]topology.Node)
				exclusion[rack.String()] = rack
				newNodeList := topology.NewNodeList(dc.Children(), exclusion)
				if newNodeList.FreeSpace() > 0 {
					if ok2, server2 := newNodeList.ReserveOneVolume(rand.Intn(newNodeList.FreeSpace()), *vid); ok2 {
						if err = vg.grow(topo, *vid, repType, server1, server2); err == nil {
							counter++
						}
					}
				}
			}
		}
	case storage.Copy100:
		for i := 0; i < count; i++ {
			nl := topology.NewNodeList(topo.Children(), nil)
			picked, ret := nl.RandomlyPickN(2, 1)
			vid := topo.NextVolumeId()
			if ret {
				var servers []*topology.DataNode
				for _, n := range picked {
					if n.FreeSpace() > 0 {
						if ok, server := n.ReserveOneVolume(rand.Intn(n.FreeSpace()), vid); ok {
							servers = append(servers, server)
						}
					}
				}
				if len(servers) == 2 {
					if err = vg.grow(topo, vid, repType, servers...); err == nil {
						counter++
					}
				}
			}
		}
	case storage.Copy110:
		for i := 0; i < count; i++ {
			nl := topology.NewNodeList(topo.Children(), nil)
			picked, ret := nl.RandomlyPickN(2, 2)
			vid := topo.NextVolumeId()
			if ret {
				var servers []*topology.DataNode
				dc1, dc2 := picked[0], picked[1]
				if dc2.FreeSpace() > dc1.FreeSpace() {
					dc1, dc2 = dc2, dc1
				}
				if dc1.FreeSpace() > 0 {
					if ok, server1 := dc1.ReserveOneVolume(rand.Intn(dc1.FreeSpace()), vid); ok {
						servers = append(servers, server1)
						rack := server1.Parent()
						exclusion := make(map[string]topology.Node)
						exclusion[rack.String()] = rack
						newNodeList := topology.NewNodeList(dc1.Children(), exclusion)
						if newNodeList.FreeSpace() > 0 {
							if ok2, server2 := newNodeList.ReserveOneVolume(rand.Intn(newNodeList.FreeSpace()), vid); ok2 {
								servers = append(servers, server2)
							}
						}
					}
				}
				if dc2.FreeSpace() > 0 {
					if ok, server := dc2.ReserveOneVolume(rand.Intn(dc2.FreeSpace()), vid); ok {
						servers = append(servers, server)
					}
				}
				if len(servers) == 3 {
					if err = vg.grow(topo, vid, repType, servers...); err == nil {
						counter++
					}
				}
			}
		}
	case storage.Copy200:
		for i := 0; i < count; i++ {
			nl := topology.NewNodeList(topo.Children(), nil)
			picked, ret := nl.RandomlyPickN(3, 1)
			vid := topo.NextVolumeId()
			if ret {
				var servers []*topology.DataNode
				for _, n := range picked {
					if n.FreeSpace() > 0 {
						if ok, server := n.ReserveOneVolume(rand.Intn(n.FreeSpace()), vid); ok {
							servers = append(servers, server)
						}
					}
				}
				if len(servers) == 3 {
					if err = vg.grow(topo, vid, repType, servers...); err == nil {
						counter++
					}
				}
			}
		}
	}
	return
}