durationStr := r.Form.Get(peerRESTDuration)
	duration, _ := time.ParseDuration(durationStr)
	if duration < globalNetPerfMinDuration {
		duration = globalNetPerfMinDuration
	}
	result := siteNetperf(r.Context(), duration)
	adminLogIf(r.Context(), gob.NewEncoder(w).Encode(result))

	infos, err := globalSiteReplicationSys.GetClusterInfo(ctx)
	if err != nil {
		return results, err
	}
	var wg sync.WaitGroup
	var resultsMu sync.RWMutex
	for _, info := range infos.Sites {
		// will call siteNetperf, means call others's adminAPISiteReplicationDevNull
		if globalDeploymentID() == info.DeploymentID {
			wg.Add(1)
			go func() {
				defer wg.Done()
				result := madmin.SiteNetPerfNodeResult{}