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assign a free volume randomly

pull/2/head
Chris Lu 12 years ago
parent
8d0ea07f5f
commit
7a30a48027
4 changed files with 92 additions and 59 deletions
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  1. 3
      weed-fs/src/cmd/weed/weed.go
  2. 67
      weed-fs/src/pkg/topology/node.go
  3. 75
      weed-fs/src/pkg/topology/topo_test.go
  4. 6
      weed-fs/src/pkg/topology/topology.go

3
weed-fs/src/cmd/weed/weed.go
View File

@ -9,7 +9,9 @@ import (
"os"
"strings"
"sync"
"math/rand"
"text/template"
"time"
"unicode"
"unicode/utf8"
)
@ -39,6 +41,7 @@ func setExitStatus(n int) {
}
func main() {
rand.Seed(time.Now().UnixNano())
flag.Usage = usage
flag.Parse()

67
weed-fs/src/pkg/topology/node.go
View File

@ -8,7 +8,7 @@ import (
type NodeId string
type Node struct {
Id NodeId
countVolumeCount int
activeVolumeCount int
reservedVolumeCount int
maxVolumeCount int
parent *Node
@ -21,30 +21,45 @@ func NewNode() *Node {
n.children = make(map[NodeId]*Node)
return n
}
func (n *Node) String() string {
if n.parent!=nil {
return n.parent.String()+":"+string(n.Id)
}
return string(n.Id)
}
func (n *Node) ReserveOneVolume(r int, vid storage.VolumeId) bool {
ret := false
if n.children == nil {
return true
}
for _, node := range n.children {
freeSpace := node.maxVolumeCount - node.countVolumeCount - node.reservedVolumeCount
if r > freeSpace {
freeSpace := node.maxVolumeCount - node.activeVolumeCount - node.reservedVolumeCount
fmt.Println("r =", r, ", node =", node, ", freeSpace =", freeSpace)
if freeSpace <= 0 {
continue
}
if r >= freeSpace {
r -= freeSpace
} else {
if node.ReserveOneVolume(r, vid) {
node.reservedVolumeCount++
return true
} else {
return false
}
ret = node.ReserveOneVolume(r, vid)
if ret {
break
}
}
}
return false
if ret {
n.reservedVolumeCount++
}
return ret
}
func (n *Node) AddVolume(v *storage.VolumeInfo) {
if n.maxVolumeId < v.Id {
n.maxVolumeId = v.Id
}
n.countVolumeCount++
fmt.Println(n.Id, "adds 1, volumeCount =", n.countVolumeCount)
n.activeVolumeCount++
fmt.Println(n.Id, "adds 1, volumeCount =", n.activeVolumeCount)
if n.reservedVolumeCount > 0 { //if reserved
n.reservedVolumeCount--
}
@ -52,6 +67,12 @@ func (n *Node) AddVolume(v *storage.VolumeInfo) {
n.parent.AddVolume(v)
}
}
func (n *Node) AddMaxVolumeCount(maxVolumeCount int) {//can be negative
n.maxVolumeCount += maxVolumeCount
if n.parent != nil {
n.parent.AddMaxVolumeCount(maxVolumeCount)
}
}
func (n *Node) GetMaxVolumeId() storage.VolumeId {
return n.maxVolumeId
@ -60,17 +81,27 @@ func (n *Node) GetMaxVolumeId() storage.VolumeId {
func (n *Node) AddNode(node *Node) {
if n.children[node.Id] == nil {
n.children[node.Id] = node
n.countVolumeCount += node.countVolumeCount
n.activeVolumeCount += node.activeVolumeCount
n.reservedVolumeCount += node.reservedVolumeCount
n.maxVolumeCount += node.maxVolumeCount
fmt.Println(n.Id, "adds", node.Id, "volumeCount =", n.countVolumeCount)
fmt.Println(n.Id, "adds", node.Id, "volumeCount =", n.activeVolumeCount)
}
}
func (n *Node) RemoveNode(node *Node) {
if n.children[node.Id] != nil {
func (n *Node) RemoveNode(nodeId NodeId) {
node := n.children[nodeId]
if node != nil {
delete(n.children, node.Id)
n.countVolumeCount -= node.countVolumeCount
n.activeVolumeCount -= node.activeVolumeCount
n.maxVolumeCount -= node.maxVolumeCount
fmt.Println(n.Id, "removes", node.Id, "volumeCount =", n.countVolumeCount)
n.reservedVolumeCount -= node.reservedVolumeCount
p := n.parent
for p != nil {
p.activeVolumeCount -= node.activeVolumeCount
p.maxVolumeCount -= node.maxVolumeCount
p.reservedVolumeCount -= node.reservedVolumeCount
p = p.parent
}
fmt.Println(n.Id, "removes", node.Id, "volumeCount =", n.activeVolumeCount)
}
}

75
weed-fs/src/pkg/topology/topo_test.go
View File

@ -3,8 +3,10 @@ package topology
import (
"encoding/json"
"fmt"
"math/rand"
"pkg/storage"
"testing"
"time"
)
var topologyLayout = `
@ -77,40 +79,41 @@ func setup() *Topology {
fmt.Println("data:", data)
printMap(data)
//need to connect all nodes first before server adding volumes
//need to connect all nodes first before server adding volumes
topo := NewTopology(NodeId("mynetwork"))
mTopology := data.(map[string]interface{})
for dcKey, dcValue := range mTopology {
dc := NewDataCenter(NodeId(dcKey))
dc.Node.parent = &topo.Node
dcMap := dcValue.(map[string]interface{})
topo.Node.AddNode(&dc.Node)
topo.Node.AddNode(&dc.Node)
for rackKey, rackValue := range dcMap {
rack := NewRack(NodeId(rackKey))
rack.Node.parent = &dc.Node
rack.Node.parent = &dc.Node
rackMap := rackValue.(map[string]interface{})
dc.Node.AddNode(&rack.Node)
dc.Node.AddNode(&rack.Node)
for serverKey, serverValue := range rackMap {
server := NewServer(NodeId(serverKey))
server.Node.parent = &rack.Node
server.Node.parent = &rack.Node
serverMap := serverValue.(map[string]interface{})
rack.Node.AddNode(&server.Node)
rack.Node.AddNode(&server.Node)
for _, v := range serverMap["volumes"].([]interface{}) {
m := v.(map[string]interface{})
m := v.(map[string]interface{})
vi := &storage.VolumeInfo{Id: storage.VolumeId(int64(m["id"].(float64))), Size: int64(m["size"].(float64))}
server.AddVolume(vi)
}
server.Node.AddMaxVolumeCount(int(serverMap["limit"].(float64)))
}
}
}
fmt.Println("topology:", *topo)
bytes, err := json.Marshal(topo.Node.children)
if err!=nil{
fmt.Println("json error:", err)
}
fmt.Println("json topo:", string(bytes))
bytes, err := json.Marshal(topo.Node.children)
if err != nil {
fmt.Println("json error:", err)
}
fmt.Println("json topo:", string(bytes))
return topo
}
@ -143,34 +146,26 @@ func TestAddVolume(t *testing.T) {
topo.AddVolume(v)
}
func TestAddServer(t *testing.T) {
}
func TestAddRack(t *testing.T) {
}
func TestAddDataCenter(t *testing.T) {
}
func TestReserveVolume(t *testing.T) {
}
func TestRemoveVolume(t *testing.T) {
}
func TestRemoveServer(t *testing.T) {
}
func TestRemoveRack(t *testing.T) {
}
func TestRemoveDataCenter(t *testing.T) {
topo := setup()
topo.RemoveNode(NodeId("dc2"))
if topo.activeVolumeCount != 15 {
t.Fail()
}
topo.RemoveNode(NodeId("dc3"))
if topo.activeVolumeCount != 12 {
t.Fail()
}
}
func TestReserveOneVolume(t *testing.T) {
topo := setup()
rand.Seed(time.Now().UnixNano())
ret, vid := topo.RandomlyReserveOneVolume()
fmt.Println("topology:", topo.Node)
fmt.Println("assigned :", ret)
fmt.Println("assigned volume id:", vid)
if topo.reservedVolumeCount != 1 {
t.Fail()
}
}

6
weed-fs/src/pkg/topology/topology.go
View File

@ -3,6 +3,7 @@ package topology
import (
"math/rand"
"pkg/storage"
"fmt"
)
type Topology struct {
@ -16,7 +17,10 @@ func NewTopology(id NodeId) *Topology{
}
func (t *Topology) RandomlyReserveOneVolume() (bool,storage.VolumeId) {
r := rand.Intn(t.Node.maxVolumeCount-t.Node.countVolumeCount-t.Node.reservedVolumeCount)
slots := t.Node.maxVolumeCount-t.Node.activeVolumeCount-t.Node.reservedVolumeCount
r := rand.Intn(slots)
r = rand.Intn(slots)
fmt.Println("slots:", slots, "random :", r)
vid := t.nextVolumeId()
return t.Node.ReserveOneVolume(r,vid), vid
}

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