func (rs *rebalanceStats) update(bucket string, fi FileInfo) {
	if fi.IsLatest {
		rs.NumObjects++
	}

	rs.NumVersions++
	onDiskSz := int64(0)
	if !fi.Deleted {
		onDiskSz = fi.Size * int64(fi.Erasure.DataBlocks+fi.Erasure.ParityBlocks) / int64(fi.Erasure.DataBlocks)
	}
	rs.Bytes += uint64(onDiskSz)
	rs.Bucket = bucket
	rs.Object = fi.Name
}

type rstats []*rebalanceStats

	totalWrites           atomic.Uint64
	totalDeletes          atomic.Uint64
	totalErrsAvailability atomic.Uint64 // Captures all data availability errors such as faulty disk, timeout errors.
	totalErrsTimeout      atomic.Uint64 // Captures all timeout only errors

	// apiCalls should be placed first so alignment is guaranteed for atomic operations.
	apiCalls     [storageMetricLast]uint64

}

// writeFrame writes frame binary representation into w.
func (ww *wsWriter) writeFrame(w io.Writer, f ws.Frame) error {
	const (
		bit0  = 0x80
		len7  = int64(125)
		len16 = int64(^(uint16(0)))
		len64 = int64(^(uint64(0)) >> 1)
	)

	bts := ww.tmp[:]
	if f.Header.Fin {
		bts[0] |= bit0
	}
	bts[0] |= f.Header.Rsv << 4
	bts[0] |= byte(f.Header.OpCode)

	var n int

	var sizes []int64
	var decObjSize int64 // decrypted total object size
	if o.isMultipart() {
		sizes = make([]int64, len(o.Parts))
		for i, part := range o.Parts {
			var partSize uint64
			partSize, err = sio.DecryptedSize(uint64(part.Size))
			if err != nil {
				err = errObjectTampered
				return
			}
			sizes[i] = int64(partSize)
			decObjSize += int64(partSize)
		}

	LastUpdate time.Time

	ObjectsTotalCount uint64
	ObjectsTotalSize  uint64

	ItemsHealed uint64
	ItemsFailed uint64

	BytesDone   uint64
	BytesFailed uint64

	// Last object scanned.
	Bucket string `json:"-"`
	Object string `json:"-"`

	// Numbers when current bucket started healing,
	// for resuming with correct numbers.
	ResumeItemsHealed uint64 `json:"-"`
	ResumeItemsFailed uint64 `json:"-"`

  /// call).
  typedef std::function<int64_t(const std::string& filename, size_t offset,
                                size_t buffer_size, char* buffer,
                                TF_Status* status)>
      BlockFetcher;

  RamFileBlockCache(size_t block_size, size_t max_bytes, uint64_t max_staleness,
                    BlockFetcher block_fetcher,
                    std::function<uint64_t()> timer_seconds = TF_NowSeconds)

type expiryStats struct {
	missedExpiryTasks      atomic.Int64
	missedFreeVersTasks    atomic.Int64
	missedTierJournalTasks atomic.Int64
	workers                atomic.Int32
}

// MissedTasks returns the number of ILM expiry tasks that were missed since
// there were no available workers.
func (e *expiryStats) MissedTasks() int64 {
	return e.missedExpiryTasks.Load()
}

func reduceCommonVersions(diskVersions [][]byte, writeQuorum int) (versions []byte) {
	diskVersionsCount := make(map[uint64]int)
	for _, versions := range diskVersions {
		if len(versions) > 0 {
			diskVersionsCount[binary.BigEndian.Uint64(versions)]++
		}
	}

	var commonVersions uint64
	max := 0
	for versions, count := range diskVersionsCount {
		if max < count {
			max = count
			commonVersions = versions

		}
		return res
	default:
		return []Name{name}
	}
}

// Mask returns the type as mask.
// Compound "All" types are expanded.
func (name Name) Mask() uint64 {
	if name < objectSingleTypesEnd {
		return 1 << (name - 1)
	}
	var mask uint64
	for _, n := range name.Expand() {
		mask |= 1 << (n - 1)
	}
	return mask
}

// String - returns string representation of event type.

	deletes := make([]uint64, len(infos))
	writes := make([]uint64, len(infos))
	for index, di := range infos {
		deletes[index] = di.Metrics.TotalDeletes
		writes[index] = di.Metrics.TotalWrites
	}

	filter := func(list []uint64) (commonCount uint64) {
		max := 0
		signatureMap := map[uint64]int{}
		for _, v := range list {
			signatureMap[v]++
		}