if err != nil {
		t.Fatal(err)
	}
	if n != length {
		t.Errorf("erasureCreateFile returned %d, expected %d", n, length)
	}

	// To generate random offset/length.
	r := rand.New(rand.NewSource(UTCNow().UnixNano()))

	buf := &bytes.Buffer{}

	// Verify erasure.Decode() for random offsets and lengths.
	for range iterations {
		offset := r.Int63n(length)
		readLen := r.Int63n(length - offset)

func getRandomRange(minN, maxN int, seed int64) int {
	// special value -1 means no explicit seeding.
	if seed == -1 {
		return rand.New(rand.NewSource(time.Now().UnixNano())).Intn(maxN-minN) + minN
	}
	return rand.New(rand.NewSource(seed)).Intn(maxN-minN) + minN
}

// Randomizes the order of bytes in the byte array
// using Knuth Fisher-Yates shuffle algorithm.

	if retryAttempts <= 0 {
		retryAttempts = batchReplJobDefaultRetries
	}
	delay := job.Replicate.Flags.Retry.Delay
	if delay <= 0 {
		delay = batchReplJobDefaultRetryDelay
	}
	rnd := rand.New(rand.NewSource(time.Now().UnixNano()))

	hasTags := len(r.Flags.Filter.Tags) != 0
	isMetadata := len(r.Flags.Filter.Metadata) != 0

		t.Run(test.name, func(t *testing.T) {
			// Run multiple times, shuffling the input order.
			for i := range int64(50) {
				t.Run(fmt.Sprint(i), func(t *testing.T) {
					rng := rand.New(rand.NewSource(i))
					rng.Shuffle(len(test.input), func(i, j int) {
						test.input[i], test.input[j] = test.input[j], test.input[i]
					})
					got := mergeXLV2Versions(test.quorum, true, 0, test.input...)

			wantSelected: &inputSerialized[9],
			wantOk:       true,
		},
	}

	for testID, tt := range tests {
		rng := rand.New(rand.NewSource(0))
		// Run for a number of times, shuffling the input to ensure that output is consistent.
		for i := range 10 {
			t.Run(fmt.Sprintf("test-%d-%s-run-%d", testID, tt.name, i), func(t *testing.T) {
				if i > 0 {

		b.ResetTimer()
		b.ReportAllocs()
		for b.Loop() {
			concat(data...)
		}
	})
}

func BenchmarkConcatImplementation(b *testing.B) {
	data := make([]string, 2)
	rng := rand.New(rand.NewSource(0))
	for i := range 2 {
		var tmp [16]byte
		rng.Read(tmp[:])
		data[i] = hex.EncodeToString(tmp[:])
	}
	b.ResetTimer()
	benchmark(b, data)
}

func BenchmarkPathJoinOld(b *testing.B) {

		readLocks:            make([]string, len(restClnts)),
		Names:                names,
		clnt:                 clnt,
		rng:                  rand.New(&lockedRandSource{src: rand.NewSource(time.Now().UTC().UnixNano())}),
		refreshInterval:      drwMutexRefreshInterval,
		lockRetryMinInterval: lockRetryMinInterval,
	}
}

// Lock holds a write lock on dm.
//

	go func() {
		// Update rebalance.bin periodically once every 5-10s, chosen randomly
		// to avoid multiple pool leaders herding to update around the same
		// time.
		r := rand.New(rand.NewSource(time.Now().UnixNano()))
		randSleepFor := func() time.Duration {
			return 5*time.Second + time.Duration(float64(5*time.Second)*r.Float64())
		}

		timer := time.NewTimer(randSleepFor())
		defer timer.Stop()

	globalServerConfigMu.RLock()
	s := globalServerConfig
	globalServerConfigMu.RUnlock()

	sys.Lock()
	sys.iamRefreshInterval = iamRefreshInterval
	sys.Unlock()

	r := rand.New(rand.NewSource(time.Now().UnixNano()))

	var (
		openidInit bool
		ldapInit   bool
		authNInit  bool
		authZInit  bool
	)

	stsTLSConfig, err := xtls.Lookup(s[config.IdentityTLSSubSys][config.Default])

// the set topology, this monitoring happens at a given monitoring interval.
func (s *erasureSets) monitorAndConnectEndpoints(ctx context.Context, monitorInterval time.Duration) {
	r := rand.New(rand.NewSource(time.Now().UnixNano()))

	time.Sleep(time.Duration(r.Float64() * float64(time.Second)))

	// Pre-emptively connect the disks if possible.
	s.connectDisks(false)

	monitor := time.NewTimer(monitorInterval)