//   into memory, any mutation on xl.meta subsequently is
		//   inconsequential to the overall read operation.
		// - xl.meta metadata is still verified for quorum under lock()
		//   however writing the response doesn't need to serialize
		//   concurrent writers
		unlockOnDefer = true
		nsUnlocker = func() { lock.RUnlock(lkctx) }
	}

	// Migrate storage format if needed.
	for {
		// Migrate IAM configuration, if necessary.
		if err := saveIAMFormat(retryCtx, sys.store); err != nil {
			if configRetriableErrors(err) {
				logger.Info("Waiting for all MinIO IAM sub-system to be initialized.. possible cause (%v)", err)
				time.Sleep(time.Duration(r.Float64() * float64(time.Second)))
				continue
			}

		HTTPStatusCode: 499, // No official code, use nginx value.
	},
	ErrTooManyRequests: {
		Code:           "TooManyRequests",
		Description:    "Deadline exceeded while waiting in incoming queue, please reduce your request rate",
		HTTPStatusCode: http.StatusServiceUnavailable,
	},
	ErrUnsupportedMetadata: {
		Code:           "InvalidArgument",

	return nil
}

// IAMStorageAPI defines an interface for the IAM persistence layer
type IAMStorageAPI interface {
	// The role of the read-write lock is to prevent go routines from
	// concurrently reading and writing the IAM storage. The (r)lock()
	// functions return the iamCache. The cache can be safely written to
	// only when returned by `lock()`.
	lock() *iamCache
	unlock()
	rlock() *iamCache
	runlock()

	}

	flags := os.O_CREATE | os.O_WRONLY | os.O_TRUNC

	var w *os.File
	if sync {
		// Perform DirectIO along with fdatasync for larger xl.meta, mostly when
		// xl.meta has "inlined data" we prefer writing O_DIRECT and then doing
		// fdatasync() at the end instead of opening the file with O_DSYNC.
		//
		// This is an optimization mainly to ensure faster I/O.
		if len(b) > xioutil.DirectioAlignSize {

		{
			name:       "select-float-by-val",
			input:      testInput,
			query:      `SELECT num2 from s3object s WHERE num2 = 0.765111`,
			wantResult: `{"num2":" 0.765111"}`,
		},
		{
			name:       "select-non_exiting_values",
			input:      testInput,
			query:      `SELECT _1 as first, s._100 from s3object s LIMIT 1`,
			wantResult: `{"first":"1","_100":null}`,
		},
		{
			name:       "select-is_null_noresults",

				if !s.IsLocal() {
					for {
						if s.IsOnline() {
							break
						}
						time.Sleep(100 * time.Millisecond)
						if time.Since(t) > 10*time.Second {
							return nil, nil, errors.New("timeout waiting for disk to come online")
						}
					}
				}
			}
		}
	}

	return obj, fsDirs, nil
}

func prepareErasure16(ctx context.Context) (ObjectLayer, []string, error) {

}

// ListVersions lists current versions, and current deleted
// versions returns error for unexpected entries.
// showPendingDeletes is set to true if ListVersions needs to list objects marked deleted
// but waiting to be replicated
func (x xlMetaV2) ListVersions(volume, path string, allParts bool) ([]FileInfo, error) {
	versions := make([]FileInfo, 0, len(x.versions))
	var err error

	var dst xlMetaV2Version

result = channel.queue_declare(exclusive=False)
queue_name = result.method.queue

channel.queue_bind(exchange='bucketevents',
                   queue=queue_name)

print(' [*] Waiting for logs. To exit press CTRL+C')

def callback(ch, method, properties, body):
    print(" [x] %r" % body)

channel.basic_consume(callback,
                      queue=queue_name,