r := &fsResourceAnalyzer{
		statsProvider: statsProvider,
		calcPeriod:    calcVolumePeriod,
		eventRecorder: eventRecorder,
	}
	r.cachedVolumeStats.Store(make(statCache))
	return r
}

// Start eager background caching of volume stats.
func (s *fsResourceAnalyzer) Start() {
	s.startOnce.Do(func() {
		if s.calcPeriod <= 0 {
			klog.InfoS("Volume stats collection disabled")
			return
		}