if err != nil {
		r.lastErr = err
		return n, err
	}
	r.m.updateMeasurement(r.opts.BucketOptions, uint64(tokens))
	return n, err
}

// NewMonitoredReader returns reference to a monitored reader that throttles reads to configured bandwidth for the
// bucket.
func NewMonitoredReader(ctx context.Context, m *Monitor, r io.Reader, opts *MonitorReaderOptions) *MonitoredReader {
	reader := MonitoredReader{
		r:        r,

		var cancel context.CancelFunc
		newCtx, cancel = context.WithTimeout(ctx, throttleDeadline)
		defer cancel()
	}
	r := bandwidth.NewMonitoredReader(newCtx, globalBucketMonitor, gr, opts)
	if isMP {
		rinfo.Err = replicateObjectWithMultipart(ctx, c, tgt.Bucket, object, r, objInfo, putOpts)
	} else {