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1. refactoring, merge "replication" logic into "topology" package

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2. when growing volumes, additional preferred "rack" and "dataNode"
paraemters are also provided. Previously only "dataCenter" paraemter is
provided.
This commit is contained in:
Chris Lu
2014-04-13 01:29:52 -07:00
parent 008aee0dc1
commit f7f582ec86
11 changed files with 144 additions and 77 deletions
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9
go/topology/topology.go
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@@ -108,8 +108,13 @@ func (t *Topology) NextVolumeId() storage.VolumeId {
return next
}
func (t *Topology) PickForWrite(collectionName string, rp *storage.ReplicaPlacement, count int, dataCenter string) (string, int, *DataNode, error) {
vid, count, datanodes, err := t.GetVolumeLayout(collectionName, rp).PickForWrite(count, dataCenter)
func (t *Topology) HasWriableVolume(option *VolumeGrowOption) bool {
vl := t.GetVolumeLayout(option.Collection, option.ReplicaPlacement)
return vl.GetActiveVolumeCount(option) > 0
}
func (t *Topology) PickForWrite(count int, option *VolumeGrowOption) (string, int, *DataNode, error) {
vid, count, datanodes, err := t.GetVolumeLayout(option.Collection, option.ReplicaPlacement).PickForWrite(count, option)
if err != nil || datanodes.Length() == 0 {
return "", 0, nil, errors.New("No writable volumes avalable!")
}