versions            []byte
	setIndex, poolIndex int
	queued              time.Time
	scanMode            madmin.HealScanMode
}

// mrfState sncapsulates all the information
// related to the global background MRF.
type mrfState struct {
	opCh chan partialOperation
}

// Add a partial S3 operation (put/delete) when one or more disks are offline.
func (m *mrfState) addPartialOp(op partialOperation) {
	if m == nil {
		return

	opts.Prefix = q.Get("prefix")
	return
}

const (
	replicationMRFDir = bucketMetaPrefix + SlashSeparator + replicationDir + SlashSeparator + "mrf"
	mrfMetaFormat     = 1
	mrfMetaVersionV1  = 1
	mrfMetaVersion    = mrfMetaVersionV1
)

// MRFReplicateEntry mrf entry to save to disk
type MRFReplicateEntry struct {
	Bucket     string `json:"bucket" msg:"b"`
	Object     string `json:"object" msg:"o"`

	WorkerAutoDefault = 100

	// MRFWorkerMaxLimit max number of mrf workers per node for "fast" mode
	MRFWorkerMaxLimit = 8

	// MRFWorkerMinLimit min number of mrf workers per node for "slow" mode
	MRFWorkerMinLimit = 2

	// MRFWorkerAutoDefault is default number of mrf workers for "auto" mode
	MRFWorkerAutoDefault = 4

		rx.Peak = rx.Curr
	}
	rx.N++
}

// ReplicationMRFStats holds stats of MRF backlog saved to disk in the last 5 minutes
// and number of entries that failed replication after 3 retries
type ReplicationMRFStats struct {
	LastFailedCount uint64 `json:"failedCount_last5min"`
	// Count of unreplicated entries that were dropped after MRF retry limit reached since cluster start.
	TotalDroppedCount uint64 `json:"droppedCount_since_uptime"`

		// When there is versions disparity we are healing
		// the content implicitly for all versions, we can
		// avoid triggering another MRF heal for offline drives.
		if len(versions) == 0 {
			// Whether a disk was initially or becomes offline
			// during this upload, send it to the MRF list.
			for i := 0; i < len(onlineDisks); i++ {
				if onlineDisks[i] != nil && onlineDisks[i].IsOnline() {
					continue
				}

	// for site replication - maintain stats at global level
	srStats *SRStats
	// active worker stats
	workers *ActiveWorkerStat
	// queue stats cache
	qCache queueCache

	pCache proxyStatsCache
	// mrf backlog stats
	mrfStats ReplicationMRFStats
	// for bucket replication, continue to use existing cache
	Cache             map[string]*BucketReplicationStats
	mostRecentStats   BucketStatsMap
	registry          metrics.Registry

	Checksum []byte `msg:"cs,allownil"`

	// Versioned - indicates if this file is versioned or not.
	Versioned bool `msg:"vs"`
}

// ShallowCopy - copies minimal information for READ MRF checks.
func (fi FileInfo) ShallowCopy() (n FileInfo) {
	n.Volume = fi.Volume
	n.Name = fi.Name
	n.VersionID = fi.VersionID
	n.Deleted = fi.Deleted
	n.Erasure = fi.Erasure
	return
}

	done := keepHTTPResponseAlive(w)
	result := driveSpeedTest(r.Context(), opts)
	done(nil)

	peersLogIf(r.Context(), gob.NewEncoder(w).Encode(result))
}

// GetReplicationMRFHandler - returns replication MRF for bucket
func (s *peerRESTServer) GetReplicationMRFHandler(w http.ResponseWriter, r *http.Request) {
	if !s.IsValid(w, r) {
		s.writeErrorResponse(w, errors.New("invalid request"))
		return
	}

	if err != nil {
		return result, err
	}
	defer xhttp.DrainBody(respBody)
	err = gob.NewDecoder(respBody).Decode(&result)
	return result, err
}

// GetReplicationMRF - get replication MRF for bucket
func (client *peerRESTClient) GetReplicationMRF(ctx context.Context, bucket string) (chan madmin.ReplicationMRF, error) {
	values := make(url.Values)
	values.Set(peerRESTBucket, bucket)

			adminMiddleware(adminAPI.ReplicationDiffHandler)).Queries("bucket", "{bucket:.*}")
		// ReplicationMRFHandler - MinIO extension API
		adminRouter.Methods(http.MethodGet).Path(adminVersion+"/replication/mrf").HandlerFunc(
			adminMiddleware(adminAPI.ReplicationMRFHandler)).Queries("bucket", "{bucket:.*}")

		// Batch job operations
		adminRouter.Methods(http.MethodPost).Path(adminVersion + "/start-job").HandlerFunc(