streamWg    sync.WaitGroup
	reuseBlocks bool
}

// newMetacacheWriter will create a serializer that will write objects in given order to the output.
// Provide a block size that affects latency. If 0 a default of 128KiB will be used.
// Block size can be up to 4MiB.
func newMetacacheWriter(out io.Writer, blockSize int) *metacacheWriter {
	if blockSize < 8<<10 {
		blockSize = 128 << 10
	}
	w := metacacheWriter{
		mw:        nil,

	}
}

func TestHealLastDataShard(t *testing.T) {
	tests := []struct {
		name     string
		dataSize int64
	}{
		{"4KiB", 4 * humanize.KiByte},
		{"64KiB", 64 * humanize.KiByte},
		{"128KiB", 128 * humanize.KiByte},
		{"1MiB", 1 * humanize.MiByte},
		{"5MiB", 5 * humanize.MiByte},
		{"10MiB", 10 * humanize.MiByte},
		{"5MiB-1KiB", 5*humanize.MiByte - 1*humanize.KiByte},

		bs.XferRateSml.addSize(sz, duration)
	}
}

// RMetricName - name of replication metric
type RMetricName string

const (
	// Large - objects larger than 128MiB
	Large RMetricName = "Large"
	// Small - objects smaller than 128MiB
	Small RMetricName = "Small"
	// Total - metric pertaining to totals
	Total RMetricName = "Total"
)

// ReplQNodeStats holds queue stats for replication per node

	MRFWorkerMinLimit = 2

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

	// LargeWorkerCount is default number of workers assigned to large uploads ( >= 128MiB)
	LargeWorkerCount = 10
)

// NewReplicationPool creates a pool of replication workers of specified size