package replication import ( "code.google.com/p/weed-fs/go/sequence" "code.google.com/p/weed-fs/go/storage" "code.google.com/p/weed-fs/go/topology" "encoding/json" "fmt" "testing" ) var topologyLayout = ` { "dc1":{ "rack1":{ "server111":{ "volumes":[ {"id":1, "size":12312}, {"id":2, "size":12312}, {"id":3, "size":12312} ], "limit":3 }, "server112":{ "volumes":[ {"id":4, "size":12312}, {"id":5, "size":12312}, {"id":6, "size":12312} ], "limit":10 } }, "rack2":{ "server121":{ "volumes":[ {"id":4, "size":12312}, {"id":5, "size":12312}, {"id":6, "size":12312} ], "limit":4 }, "server122":{ "volumes":[], "limit":4 }, "server123":{ "volumes":[ {"id":2, "size":12312}, {"id":3, "size":12312}, {"id":4, "size":12312} ], "limit":5 } } }, "dc2":{ }, "dc3":{ "rack2":{ "server321":{ "volumes":[ {"id":1, "size":12312}, {"id":3, "size":12312}, {"id":5, "size":12312} ], "limit":4 } } } } ` func setup(topologyLayout string) *topology.Topology { var data interface{} err := json.Unmarshal([]byte(topologyLayout), &data) if err != nil { fmt.Println("error:", err) } fmt.Println("data:", data) //need to connect all nodes first before server adding volumes topo, err := topology.NewTopology("weedfs", "/etc/weedfs/weedfs.conf", sequence.NewMemorySequencer(), 32*1024, 5) if err != nil { panic("error: " + err.Error()) } mTopology := data.(map[string]interface{}) for dcKey, dcValue := range mTopology { dc := topology.NewDataCenter(dcKey) dcMap := dcValue.(map[string]interface{}) topo.LinkChildNode(dc) for rackKey, rackValue := range dcMap { rack := topology.NewRack(rackKey) rackMap := rackValue.(map[string]interface{}) dc.LinkChildNode(rack) for serverKey, serverValue := range rackMap { server := topology.NewDataNode(serverKey) serverMap := serverValue.(map[string]interface{}) rack.LinkChildNode(server) for _, v := range serverMap["volumes"].([]interface{}) { m := v.(map[string]interface{}) vi := storage.VolumeInfo{ Id: storage.VolumeId(int64(m["id"].(float64))), Size: uint64(m["size"].(float64)), Version: storage.CurrentVersion} server.AddOrUpdateVolume(vi) } server.UpAdjustMaxVolumeCountDelta(int(serverMap["limit"].(float64))) } } } return topo } func TestFindEmptySlotsForOneVolume(t *testing.T) { topo := setup(topologyLayout) vg := NewDefaultVolumeGrowth() rp, _ := storage.NewReplicaPlacementFromString("002") servers, err := vg.findEmptySlotsForOneVolume(topo, "dc1", rp) if err != nil { fmt.Println("finding empty slots error :", err) t.Fail() } for _, server := range servers { fmt.Println("assigned node :", server.Id()) } }