return 0, err
		}

		// Decrement output size.
		write -= int64(n)

		// Increment written.
		totalWritten += int64(n)
	}

	// Success.
	return totalWritten, nil
}

// returns deploymentID from uploadID
func getDeplIDFromUpload(uploadID string) (string, error) {
	uploadBytes, err := base64.RawURLEncoding.DecodeString(uploadID)
	if err != nil {

		query.Set(string(k), "true")
	}

	healthInfo := madmin.HealthInfo{
		TimeStamp: time.Now().UTC(),
		Version:   madmin.HealthInfoVersion,
		Minio: madmin.MinioHealthInfo{
			Info: madmin.MinioInfo{
				DeploymentID: globalDeploymentID(),
			},
		},
	}

	go fetchHealthInfo(healthCtx, objectAPI, &query, healthInfoCh, healthInfo)

	for {
		select {
		case hi, hasMore := <-healthInfoCh:
			if !hasMore {

				ep.SetCount, ep.DrivesPerSet, deploymentID)
		})
		if err != nil {
			return nil, err
		}

		if deploymentID == "" {
			// all pools should have same deployment ID
			deploymentID = formats[i].ID
		}

		// Validate if users brought different DeploymentID pools.
		if deploymentID != formats[i].ID {

		for j := range setDriveCount {
			disk := storageDisks[i*setDriveCount+j]
			newFormat := format.Clone()
			newFormat.Erasure.This = format.Erasure.Sets[i][j]
			if deploymentID != "" {
				newFormat.ID = deploymentID
			}
			hostCount[disk.Hostname()]++
			formats[i*setDriveCount+j] = newFormat
		}
		var once sync.Once
		for host, count := range hostCount {
			if count > wantAtMost {

// uptime, etc..
type ServerProperties struct {
	Uptime       int64    `json:"uptime"`
	Version      string   `json:"version"`
	CommitID     string   `json:"commitID"`
	DeploymentID string   `json:"deploymentID"`
	Region       string   `json:"region"`
	SQSARN       []string `json:"sqsARN"`
}

// serverConnStats holds transferred bytes from/to the server
type serverConnStats struct {

	// Total number of sets and the number of disks per set.
	setCount, setDriveCount int
	defaultParityCount      int

	poolIndex int

	// Distribution algorithm of choice.
	distributionAlgo string
	deploymentID     [16]byte

	lastConnectDisksOpTime time.Time
}

var staleUploadsCleanupIntervalChangedCh = make(chan struct{})

func (s *erasureSets) getDiskMap() map[Endpoint]StorageAPI {

				start := time.Now()

				for result := range sys.hcClient.Alive(cctx, madmin.AliveOpts{}, eps...) {
					var lastOnline time.Time
					var offline time.Duration
					//	var deploymentID string
					sys.hMutex.RLock()
					prev, ok := sys.hc[result.Endpoint.Host]
					sys.hMutex.RUnlock()
					if ok {
						if prev.Online != result.Online || !result.Online {
							if !prev.lastHCAt.IsZero() {

	reqInfo := logger.GetReqInfo(ctx)
	var newReqInfo *logger.ReqInfo
	if reqInfo != nil {
		newReqInfo = logger.NewReqInfo(reqInfo.RemoteHost, reqInfo.UserAgent, reqInfo.DeploymentID, reqInfo.RequestID, reqInfo.API, bucket, object)
	} else {
		newReqInfo = logger.NewReqInfo("", "", globalDeploymentID(), "", "Heal", bucket, object)
	}
	healCtx := logger.SetReqInfo(GlobalContext, newReqInfo)

	reqID := w.Header().Get(xhttp.AmzRequestID)

	vars := mux.Vars(r)
	bucket := vars["bucket"]
	object := likelyUnescapeGeneric(vars["object"], url.PathUnescape)
	reqInfo := &logger.ReqInfo{
		DeploymentID: globalDeploymentID(),
		RequestID:    reqID,
		RemoteHost:   handlers.GetSourceIP(r),
		Host:         getHostName(r),
		UserAgent:    r.UserAgent(),
		API:          api,
		BucketName:   bucket,

## Cloud Scale Deployment