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add dataCenter option when assign file keys

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add dataCenter option when starting volume servers
some work related to freeze a volume. Not tested yet.
This commit is contained in:
Chris Lu
2013-06-19 18:10:38 -07:00
parent 715d327df0
commit 50269b74ce
16 changed files with 287 additions and 115 deletions
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15
go/topology/node.go
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@@ -10,7 +10,7 @@ type Node interface {
Id() NodeId
String() string
FreeSpace() int
ReserveOneVolume(r int, vid storage.VolumeId) (bool, *DataNode)
ReserveOneVolume(r int, vid storage.VolumeId, dataCenter string) (bool, *DataNode)
UpAdjustMaxVolumeCountDelta(maxVolumeCountDelta int)
UpAdjustVolumeCountDelta(volumeCountDelta int)
UpAdjustActiveVolumeCountDelta(activeVolumeCountDelta int)
@@ -26,6 +26,8 @@ type Node interface {
CollectDeadNodeAndFullVolumes(freshThreshHold int64, volumeSizeLimit uint64)
IsDataNode() bool
IsRack() bool
IsDataCenter() bool
Children() map[NodeId]Node
Parent() Node
@@ -78,23 +80,26 @@ func (n *NodeImpl) Parent() Node {
func (n *NodeImpl) GetValue() interface{} {
return n.value
}
func (n *NodeImpl) ReserveOneVolume(r int, vid storage.VolumeId) (bool, *DataNode) {
func (n *NodeImpl) ReserveOneVolume(r int, vid storage.VolumeId, dataCenter string) (bool, *DataNode) {
ret := false
var assignedNode *DataNode
for _, node := range n.children {
freeSpace := node.FreeSpace()
//fmt.Println("r =", r, ", node =", node, ", freeSpace =", freeSpace)
// fmt.Println("r =", r, ", node =", node, ", freeSpace =", freeSpace)
if freeSpace <= 0 {
continue
}
if dataCenter != "" && node.IsDataCenter() && node.Id() != NodeId(dataCenter) {
continue
}
if r >= freeSpace {
r -= freeSpace
} else {
if node.IsDataNode() && node.FreeSpace() > 0 {
//fmt.Println("vid =", vid, " assigned to node =", node, ", freeSpace =", node.FreeSpace())
// fmt.Println("vid =", vid, " assigned to node =", node, ", freeSpace =", node.FreeSpace())
return true, node.(*DataNode)
}
ret, assignedNode = node.ReserveOneVolume(r, vid)
ret, assignedNode = node.ReserveOneVolume(r, vid, dataCenter)
if ret {
break
}