if rcfg != nil {
		for _, rule := range rcfg.Rules {
			if rule.Status != sreplication.Status(replication.Disabled) {
				tgt, isValidARN := arnTgtMap[rule.Destination.ARN] // detect stale ARN in replication config
				_, epFound := epDeplIDMap[tgt.URL().String()]      // detect end point change at site level
				if !isValidARN || !epFound {
					replMismatch = true
					break
				}
			}
		}
	}

	go func() {
		var buf bytes.Buffer
		enc := json.NewEncoder(&buf)
		for {
			select {
			case <-ctx.Done():
				return
			case li := <-logCh:
				if !li.SendLog(node, logKind) {
					continue
				}
				buf.Reset()
				if err := enc.Encode(li); err != nil {
					continue
				}
				select {
				case <-ctx.Done():
					return

	}
}

// replicateObject replicates object data for specified version of the object to destination bucket
// The source object is then updated to reflect the replication status.
func (ri ReplicateObjectInfo) replicateObject(ctx context.Context, objectAPI ObjectLayer, tgt *TargetClient) (rinfo replicatedTargetInfo) {
	startTime := time.Now()
	bucket := ri.Bucket
	object := ri.Name

	rAction := replicateAll

		// do an additional verification whether object exists when object is deletemarker and request
		// is from replication
		if opts.CheckDMReplicationReady {
			topts := opts
			topts.VersionID = ""
			goi, gerr := getObjectInfo(ctx, bucket, object, topts)
			if gerr == nil || goi.VersionID != "" { // object layer returned more info because object is deleted

// HEAD requests on an object validates the existence of the object.
// The responses for fetching the object when If-Modified-Since
// and If-Unmodified-Since headers set are validated.
// If-Modified-Since - Return the object only if it has been modified since the specified time, else return a 304 (not modified).

		Name:      sizeDistribution,
		Help:      "Distribution of object sizes across a cluster",
		Type:      histogramMetric,
	}
}

func getClusterObjectVersionsMD() MetricDescription {
	return MetricDescription{
		Namespace: clusterMetricNamespace,
		Subsystem: objectsSubsystem,
		Name:      versionDistribution,
		Help:      "Distribution of object versions across a cluster",
		Type:      histogramMetric,
	}
}

				// 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),
				// Read last half of object
				fmt.Sprintf("bytes=-%d", objLen/2),
				// Read middle half of object
				fmt.Sprintf("bytes=%d-%d", objLen/4, objLen*3/4),
				// Read 100MiB of the object from the beginning