persister/whisper_aggregation.go
func (a *WhisperAggregation) match(metric string) *whisperAggregationItem {
	for _, s := range a.Data {
		if s.pattern.MatchString(metric) {
			return s
		}
	}
	return a.Default
}
func (a *WhisperAggregation) match(metric string) *whisperAggregationItem {
	for _, s := range a.Data {
		if s.pattern.MatchString(metric) {
			return s
		}
	}
	return a.Default
}
// Match find schema for metric