func TestTinyPeer(t *testing.T) {
pi := torus.PeerInfoList{
&models.PeerInfo{
UUID: "a",
TotalBlocks: 20 * 1024 * 1024 * 2,
},
&models.PeerInfo{
UUID: "b",
TotalBlocks: 20 * 1024 * 1024 * 2,
},
&models.PeerInfo{
UUID: "c",
TotalBlocks: 100 * 1024 * 2,
},
}
k := &ketama{
version: 1,
peers: pi,
rep: 2,
ring: hashring.NewWithWeights(pi.GetWeights()),
}
l, err := k.GetPeers(torus.BlockRef{
INodeRef: torus.NewINodeRef(3, 4),
Index: 5,
})
if err != nil {
t.Fatal(err)
}
t.Log(l.Peers)
}
func (f *Feature) SetupRing() {
if f.Enabled > 0.0 && f.Enabled < 1.0 {
weights := make(map[string]int)
weights["enabled"] = int(f.Enabled * 100)
weights["disabled"] = int((1 - f.Enabled) * 100)
f.ring = hashring.NewWithWeights(weights)
}
}
func (exp *Experiment) SetupRing() {
weights := make(map[string]int)
for _, alt := range exp.Alternatives {
weights[alt.Name] = alt.Weight
}
exp.ring = hashring.NewWithWeights(weights)
}
func (k *ketama) AddPeers(peers torus.PeerInfoList) (torus.Ring, error) {
newPeers := k.peers.Union(peers)
if reflect.DeepEqual(newPeers.PeerList(), k.peers.PeerList()) {
return nil, torus.ErrExists
}
newk := &ketama{
version: k.version + 1,
rep: k.rep,
peers: newPeers,
ring: hashring.NewWithWeights(newPeers.GetWeights()),
}
return newk, nil
}
func (k *ketama) RemovePeers(pl torus.PeerList) (torus.Ring, error) {
newPeers := k.peers.AndNot(pl)
if len(newPeers) == len(k.Members()) {
return nil, torus.ErrNotExist
}
newk := &ketama{
version: k.version + 1,
rep: k.rep,
peers: newPeers,
ring: hashring.NewWithWeights(newPeers.GetWeights()),
}
return newk, nil
}
func makeKetama(r *models.Ring) (torus.Ring, error) {
rep := int(r.ReplicationFactor)
if rep == 0 {
rep = 1
}
pi := torus.PeerInfoList(r.Peers)
if rep > len(pi) {
clog.Noticef("Using ring that requests replication level %d, but has only %d peers. Add nodes to match replication.", rep, len(pi))
}
return &ketama{
version: int(r.Version),
peers: pi,
rep: rep,
ring: hashring.NewWithWeights(pi.GetWeights()),
}, nil
}