}{
		// request for byte range 10-11.
		// expecting the result to contain only putContent[10:12] bytes.
		{"10-11", putContent[10:12]},
		// request for object data after the first byte.
		{"1-", putContent[1:]},
		// request for object data after the first byte.
		{"6-", putContent[6:]},
		// request for last 2 bytes of the object.
		{"-2", putContent[len(putContent)-2:]},
		// request for last 7 bytes of the object.

		Name:      ttfbDistribution,
		Help:      "Distribution of time to first byte across API calls",
		Type:      gaugeMetric,
	}
}

func getBucketTTFBDistributionMD() MetricDescription {
	return MetricDescription{
		Namespace: bucketMetricNamespace,
		Subsystem: ttfbSubsystem,
		Name:      ttfbDistribution,
		Help:      "Distribution of time to first byte across API calls per bucket",
		Type:      gaugeMetric,
	}

					return errSRBucketMetaError(err)
				}
			}
		}
	}

	// Order matters from now on how the information is
	// synced to remote sites.

	// Policies should be synced first.
	{
		// Replicate IAM policies on local to all peers.
		allPolicyDocs, err := globalIAMSys.ListPolicyDocs(ctx, "")
		if err != nil {
			return errSRBackendIssue(err)
		}

		s.markStatus(ResyncStarted, opts, objectAPI)
	}

	// Walk through all object versions - Walk() is always in ascending order needed to ensure
	// delete marker replicated to target after object version is first created.
	if err := objectAPI.Walk(ctx, opts.bucket, "", objInfoCh, WalkOptions{}); err != nil {
		replLogIf(ctx, err)
		return
	}

	s.RLock()
	m := s.statusMap[opts.bucket]

// If no ObjectLayer is provided no set status is returned.
func getAggregatedBackgroundHealState(ctx context.Context, o ObjectLayer) (madmin.BgHealState, error) {
	// Get local heal status first
	bgHealStates, ok := getLocalBackgroundHealStatus(ctx, o)
	if !ok {
		return bgHealStates, errServerNotInitialized
	}

	if globalIsDistErasure {
		// Get heal status from other peers

			// Various ranges to query - all are valid!
			rangeHdrs := []string{
				// Read first byte of object
				fmt.Sprintf("bytes=%d-%d", 0, 0),
				// Read second byte of object
				fmt.Sprintf("bytes=%d-%d", 1, 1),
				// Read last byte of object
				fmt.Sprintf("bytes=-%d", 1),
				// Read all but first byte of object
				"bytes=1-",
				// Read first half of object
				fmt.Sprintf("bytes=%d-%d", 0, objLen/2),