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remove reservedVolumeCount to simplify volume allocation logic

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This commit is contained in:
Chris Lu 2012-09-01 10:51:07 -07:00
parent c48bda0232
commit 1760dd083d
2 changed files with 2 additions and 12 deletions
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12
weed-fs/src/pkg/topology/node.go
View File

@ -9,7 +9,6 @@ type NodeId string
type Node struct {
Id NodeId
activeVolumeCount int
reservedVolumeCount int
maxVolumeCount int
parent *Node
children map[NodeId]*Node
@ -35,7 +34,7 @@ func (n *Node) ReserveOneVolume(r int, vid storage.VolumeId) (bool, *Node) {
ret := false
var assignedNode *Node
for _, node := range n.children {
freeSpace := node.maxVolumeCount - node.activeVolumeCount - node.reservedVolumeCount
freeSpace := node.maxVolumeCount - node.activeVolumeCount
fmt.Println("r =", r, ", node =", node, ", freeSpace =", freeSpace)
if freeSpace <= 0 {
continue
@ -49,9 +48,6 @@ func (n *Node) ReserveOneVolume(r int, vid storage.VolumeId) (bool, *Node) {
}
}
}
if ret {
n.reservedVolumeCount++
}
return ret, assignedNode
}
@ -61,9 +57,6 @@ func (n *Node) AddVolume(v *storage.VolumeInfo) {
}
n.activeVolumeCount++
fmt.Println(n.Id, "adds 1, volumeCount =", n.activeVolumeCount)
if n.reservedVolumeCount > 0 { //if reserved
n.reservedVolumeCount--
}
if n.parent != nil {
n.parent.AddVolume(v)
}
@ -83,7 +76,6 @@ func (n *Node) AddNode(node *Node) {
if n.children[node.Id] == nil {
n.children[node.Id] = node
n.activeVolumeCount += node.activeVolumeCount
n.reservedVolumeCount += node.reservedVolumeCount
n.maxVolumeCount += node.maxVolumeCount
fmt.Println(n.Id, "adds", node.Id, "volumeCount =", n.activeVolumeCount)
}
@ -95,12 +87,10 @@ func (n *Node) RemoveNode(nodeId NodeId) {
delete(n.children, node.Id)
n.activeVolumeCount -= node.activeVolumeCount
n.maxVolumeCount -= node.maxVolumeCount
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)

2
weed-fs/src/pkg/topology/topology.go
View File

@ -17,7 +17,7 @@ func NewTopology(id NodeId) *Topology{
}
func (t *Topology) RandomlyReserveOneVolume() (bool, *Node, storage.VolumeId) {
slots := t.Node.maxVolumeCount-t.Node.activeVolumeCount-t.Node.reservedVolumeCount
slots := t.Node.maxVolumeCount-t.Node.activeVolumeCount
r := rand.Intn(slots)
r = rand.Intn(slots)
fmt.Println("slots:", slots, "random :", r)