// dynamic sleeper to avoid thundering herd for trash folder expunge routine
	deleteCleanupSleeper = newDynamicSleeper(5, 25*time.Millisecond, false)

	// dynamic sleeper for multipart expiration routine
	deleteMultipartCleanupSleeper = newDynamicSleeper(5, 25*time.Millisecond, false)

	// Is _MINIO_DISABLE_API_FREEZE_ON_BOOT set?

	sys.iamRefreshInterval = iamRefreshInterval
	// Initialize IAM store
	sys.initStore(objAPI, etcdClient)
	sys.Unlock()

	retryCtx, cancel := context.WithCancel(ctx)

	// Indicate to our routine to exit cleanly upon return.
	defer cancel()

	r := rand.New(rand.NewSource(time.Now().UnixNano()))

	// Migrate storage format if needed.
	for {
		// Migrate IAM configuration, if necessary.

	}

	pr, pw := xioutil.WaitPipe()
	go func() {
		pw.CloseWithError(er.getObjectWithFileInfo(ctx, bucket, object, off, length, pw, fi, metaArr, onlineDisks))
	}()

	// Cleanup function to cause the go routine above to exit, in
	// case of incomplete read.
	pipeCloser := func() {
		pr.CloseWithError(nil)
	}

	if !unlockOnDefer {
		return fn(pr, h, pipeCloser, nsUnlocker)
	}

		globalLeaderLock = newSharedLock(GlobalContext, z, "leader.lock")
	})

	// Enable background operations on
	//
	// - Disk auto healing
	// - MRF (most recently failed) healing
	// - Background expiration routine for lifecycle policies
	bootstrapTrace("initAutoHeal", func() {
		initAutoHeal(GlobalContext, z)
	})

	bootstrapTrace("initHealMRF", func() {
		go globalMRFState.healRoutine(z)
	})

	cpuSubsystem              MetricSubsystem = "cpu_avg"
	storageClassSubsystem     MetricSubsystem = "storage_class"
	fileDescriptorSubsystem   MetricSubsystem = "file_descriptor"
	goRoutines                MetricSubsystem = "go_routine"
	ioSubsystem               MetricSubsystem = "io"
	nodesSubsystem            MetricSubsystem = "nodes"
	objectsSubsystem          MetricSubsystem = "objects"
	bucketsSubsystem          MetricSubsystem = "bucket"

          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "exemplar": true,
          "expr": "minio_node_go_routine_total{job=~\"$scrape_jobs\"}",
          "format": "time_series",
          "hide": false,
          "instant": false,
          "interval": "",
          "intervalFactor": 1,
          "legendFormat": "{{server}}",

	return client.endpoint.PoolIdx, client.endpoint.SetIdx, client.endpoint.DiskIdx
}

// Wrapper to restClient.Call to handle network errors, in case of network error the connection is disconnected
// and a healthcheck routine gets invoked that would reconnect.
func (client *storageRESTClient) call(ctx context.Context, method string, values url.Values, body io.Reader, length int64) (io.ReadCloser, error) {
	if values == nil {
		values = make(url.Values)

	// Load rebalance metadata if present
	err := z.loadRebalanceMeta(ctx)
	if err != nil {
		return fmt.Errorf("failed to load rebalance data: %w", err)
	}

	// Start rebalance routine
	z.StartRebalance()

	meta := poolMeta{}
	if err := meta.load(ctx, z.serverPools[0], z.serverPools); err != nil {
		return err
	}

	update, err := meta.validate(z.serverPools)
	if err != nil {

| `cpu_total_seconds`           | `counter` | Total user and system CPU time spent in seconds                                                                | `server` |
| `go_routine_total`            | `gauge`   | Total number of go routines running                                                                            | `server` |

| `minio_node_file_descriptor_open_total`    | Total number of open file descriptors by the MinIO Server process.                                              |
| `minio_node_go_routine_total`              | Total number of go routines running.                                                                            |