metricsGroupOpts: opts,
	}
	mg.RegisterRead(func(_ context.Context) (metrics []MetricV2) {
		metrics = make([]MetricV2, 0, 16)
		nodesUp, nodesDown := globalNotificationSys.GetPeerOnlineCount()
		metrics = append(metrics, MetricV2{
			Description: getNodeOnlineTotalMD(),
			Value:       float64(nodesUp),
		})
		metrics = append(metrics, MetricV2{
			Description: getNodeOfflineTotalMD(),

// server lists all metrics that could be returned for the requested path.
//
// The (repeatable) `buckets` query parameter is a list of bucket names (or it
// could be a comma separated value) to return metrics with a bucket label.
// Bucket metrics will be returned only for the provided buckets. If no buckets
// parameter is provided, no bucket metrics are returned.

			t = &m
		}

		mx[Total] = *t
		metric := SRMetric{
			ReplicatedSize:  v.ReplicatedSize,
			ReplicatedCount: v.ReplicatedCount,
			DeploymentID:    dID,
			Failed:          v.Failed.toMetric(),
			XferStats:       mx,
		}
		epHealth, ok := epMap[v.Endpoint]
		if ok {
			metric.Endpoint = epHealth.Endpoint
			metric.TotalDowntime = epHealth.offlineDuration
			metric.LastOnline = epHealth.lastOnline

func (z MetricTypeV2) Msgsize() (s int) {
	s = msgp.StringPrefixSize + len(string(z))
	return
}

// MarshalMsg implements msgp.Marshaler
func (z *MetricV2) MarshalMsg(b []byte) (o []byte, err error) {
	o = msgp.Require(b, z.Msgsize())
	// map header, size 6
	// string "Description"
	o = append(o, 0x86, 0xab, 0x44, 0x65, 0x73, 0x63, 0x72, 0x69, 0x70, 0x74, 0x69, 0x6f, 0x6e)

		"Number of failures in DELETE tagging requests proxied to replication target",
		bucketL, targetArnL)
)

// loadBucketReplicationMetrics - `BucketMetricsLoaderFn` for bucket replication metrics
// such as latency and sent bytes.
func loadBucketReplicationMetrics(ctx context.Context, m MetricValues, c *metricsCache, buckets []string) error {
	if globalSiteReplicationSys.isEnabled() {
		return nil
	}

After Prometheus is configured, you can use Grafana to visualize MinIO metrics. Refer the [document here to setup Grafana with MinIO prometheus metrics](https://github.com/minio/minio/blob/master/docs/metrics/prometheus/grafana/README.md).

## List of metrics exposed by MinIO

- MinIO exports Prometheus compatible data by default as an authorized endpoint at `/minio/v2/metrics/cluster`. 

# Metrics Version 3

In metrics version 3, all metrics are available under the following base endpoint:

```
/minio/metrics/v3
```

To query metrics of a specific type, append the appropriate path to the base endpoint.
Querying the base endpoint returns "404 Not Found."

Metrics are organized into groups at paths **relative** to the top-level endpoint above.

            SmbCircuitBreaker.CircuitBreakerMetrics metrics = cbWithMetrics.getMetrics();
            assertNotNull(metrics, "Metrics should be available");
            assertEquals(3, metrics.totalRequests(), "Should have 3 requests");
            assertEquals(3, metrics.totalSuccesses(), "Should have 3 successes");
            assertEquals(0, metrics.totalFailures(), "Should have 0 failures");

        } finally {

	scannerMetricCleanAbandoned
	scannerMetricApplyNonCurrent
	scannerMetricHealAbandonedVersion

	// START Trace metrics:
	scannerMetricStartTrace
	scannerMetricScanObject // Scan object. All operations included.
	scannerMetricHealAbandonedObject

	// END realtime metrics:
	scannerMetricLastRealtime

	// Trace only metrics:
	scannerMetricScanFolder      // Scan a folder on disk, recursively.

				hd := hi.toHealingDisk()
				di.HealInfo = &hd
			}
			di.Metrics = &madmin.DiskMetrics{
				LastMinute:              make(map[string]madmin.TimedAction, len(info.Metrics.LastMinute)),
				APICalls:                make(map[string]uint64, len(info.Metrics.APICalls)),
				TotalErrorsAvailability: info.Metrics.TotalErrorsAvailability,
				TotalErrorsTimeout:      info.Metrics.TotalErrorsTimeout,
				TotalWaiting:            info.Metrics.TotalWaiting,