storage/tsdb/tsdb.go
func (s *ReadyStorage) Set(db *tsdb.DB, startTimeMargin int64) {
	s.mtx.Lock()
	defer s.mtx.Unlock()

	s.a = &adapter{db: db, startTimeMargin: startTimeMargin}
}
func (s *ReadyStorage) Set(db *tsdb.DB, startTimeMargin int64) {
	s.mtx.Lock()
	defer s.mtx.Unlock()

	s.a = &adapter{db: db, startTimeMargin: startTimeMargin}
}
// Set the storage.