func (c *Collection) GetOrCreateVolumeLayout(rp *storage.ReplicaPlacement, ttl *storage.TTL) *VolumeLayout {
keyString := rp.String()
if ttl != nil {
keyString += ttl.String()
}
if c.storageType2VolumeLayout[keyString] == nil {
c.storageType2VolumeLayout[keyString] = NewVolumeLayout(rp, ttl, c.volumeSizeLimit)
}
return c.storageType2VolumeLayout[keyString]
}
func AllocateVolume(dn *DataNode, vid storage.VolumeId, collection string, rp *storage.ReplicaPlacement) error {
values := make(url.Values)
values.Add("volume", vid.String())
values.Add("collection", collection)
values.Add("replication", rp.String())
jsonBlob, err := util.Post("http://"+dn.PublicUrl+"/admin/assign_volume", values)
if err != nil {
return err
}
var ret AllocateVolumeResult
if err := json.Unmarshal(jsonBlob, &ret); err != nil {
return err
}
if ret.Error != "" {
return errors.New(ret.Error)
}
return nil
}