*/
      String key = (String) requireNonNull(e.nextElement());
      /*
       * requireNonNull is safe because the key came from propertyNames...
       *
       * ...except that it's possible for users to insert a string key with a non-string value, and
       * in that case, getProperty *will* return null.
       *
       * TODO(b/192002623): Handle that case: Either:
       *

	if autotune {
		newConcurrent := concurrent + (concurrent+1)/2
		autoTunedCapacityNeeded := uint64(newConcurrent * size)
		if capacity < autoTunedCapacityNeeded {
			// Turn-off auto-tuning if next possible concurrency would reach beyond disk capacity.
			return true, false, ""
		}
	}

	return true, autotune, ""
}

// DriveSpeedtestHandler - reports throughput of drives available in the cluster

		select {
		case <-mTimer.C:
			saveMRFToDisk()
			mTimer.Reset(mrfSaveInterval)
		case <-p.ctx.Done():
			p.mrfStopCh <- struct{}{}
			xioutil.SafeClose(p.mrfSaveCh)
			// We try to save if possible, but we don't care beyond that.
			saveMRFToDisk()
			return
		case e, ok := <-p.mrfSaveCh:
			if !ok {
				return
			}
			entries[e.versionID] = e

			if len(entries) >= mrfMaxEntries {

	for _, oi := range objectInputs {
		objLen := objectLength(oi)
		for _, sf := range signFns {
			// Read whole object
			mkGetReq(oi, "", caseNumber, sf)
			caseNumber++

			// No range requests are possible if the
			// object length is 0
			if objLen == 0 {
				continue
			}

			// Various ranges to query - all are valid!
			rangeHdrs := []string{
				// Read first byte of object