UpdatedAt time.Time
}

func (l *lastDayTierStats) addStats(ts tierStats) {
	now := time.Now()
	l.forwardTo(now)

	nowIdx := now.Hour()
	l.Bins[nowIdx] = l.Bins[nowIdx].add(ts)
}

// forwardTo moves time to t, clearing entries between last update and t.
func (l *lastDayTierStats) forwardTo(t time.Time) {
	if t.IsZero() {
		t = time.Now()
	}

	since := t.Sub(l.UpdatedAt).Hours()

. . .
```

Refer [Prometheus documentation](https://prometheus.io/docs/introduction/first_steps/) for more details.

### 2. Configure authentication type for Prometheus metrics

MinIO supports two authentication modes for Prometheus either `jwt` or `public`, by default MinIO runs in `jwt` mode. To allow public access without authentication for prometheus metrics set environment as follows.

```
export MINIO_PROMETHEUS_AUTH_TYPE="public"

| policy     | _string_ or _[]string_ or _comma_separated_value_ | Canned policy name to be applied for STS credentials. (Mandatory) - This can be configured to any desired value such as `roles` or `groups` by setting the environment variable `MINIO_IDENTITY_OPENID_CLAIM_NAME` |

## Get started

In this document we will explain in detail on how to configure all the prerequisites.

  - Included Client Audience: security-admin-console

#### Adding 'admin' Role

- Go to Roles
  - Add new Role `admin` with Description `${role_admin}`.
  - Add this Role into compositive role named `default-roles-{realm}` - `{realm}` should be replaced with whatever realm you created from `prerequisites` section. This role is automatically trusted in the 'Service Accounts' tab.

		  --address '172.16.34.31:9000'
		  --address '[fe80::da00:a6c8:e3ae:ddd7]:9000'`,
	)

	ErrInvalidEndpoint = newErrFn(
		"Invalid endpoint for single drive mode",
		"Please check the endpoint",
		`Single-Node modes requires absolute path without hostnames:
Examples:
   $ minio server /data/minio/ #Single Node Single Drive
   $ minio server /data-{1...4}/minio # Single Node Multi Drive`,
	)

	ErrUnsupportedBackend = newErrFn(

		}
	}
}

func TestSortIPs(t *testing.T) {
	testCases := []struct {
		ipList       []string
		sortedIPList []string
	}{
		// Default case of two ips one with higher octet moves
		// to the beginning of the list.
		{
			ipList:       []string{"127.0.0.1", "10.0.0.13"},
			sortedIPList: []string{"10.0.0.13", "127.0.0.1"},
		},
		// With multiple types of octet, chooses a higher octet.
		{

### Consistency Guarantees

MinIO follows strict **read-after-write** and **list-after-write** consistency model for all i/o operations both in distributed and standalone modes. This consistency model is only guaranteed if you use disk filesystems such as xfs, zfs or btrfs etc.. for distributed setup.