}
	return false
}

// IsEncrypted returns true if the object metadata indicates
// that it was uploaded using some form of server-side-encryption.
//
// IsEncrypted only checks whether the metadata contains at least
// one entry indicating SSE-C or SSE-S3.
func IsEncrypted(metadata map[string]string) (Type, bool) {
	if S3KMS.IsEncrypted(metadata) {
		return S3KMS, true
	}
	if S3.IsEncrypted(metadata) {
		return S3, true

		if err := sm.load(ctx, newObjectLayerFn()); err == nil {
			<-ctx.Done()
			return
		}
		duration := time.Duration(r.Float64() * float64(time.Second*10))
		if duration < time.Second {
			// Make sure to sleep at least a second to avoid high CPU ticks.
			duration = time.Second
		}
		time.Sleep(duration)
	}
}

// load resync metrics saved on disk into memory

	targetsMap map[string]replicateTargetDecision
}

// ReplicateAny returns true if at least one target qualifies for replication
func (d ReplicateDecision) ReplicateAny() bool {
	for _, t := range d.targetsMap {
		if t.Replicate {
			return true
		}
	}
	return false
}

// Synchronous returns true if at least one target qualifies for synchronous replication
func (d ReplicateDecision) Synchronous() bool {

				jt.Take()
				go healEntry(bucket, entry)
			},
			partial: func(entries metaCacheEntries, _ []error) {
				entry, ok := entries.resolve(&resolver)
				if !ok {
					// check if we can get one entry at least
					// proceed to heal nonetheless.
					entry, _ = entries.firstFound()
				}
				jt.Take()
				go healEntry(bucket, *entry)
			},
			finished: nil,
		})

		// Expecting to fail with `errInvalidArgument`.
		{
			srcVol:      "ab",
			destVol:     "dest-vol-non-existent",
			srcPath:     "file4",
			destPath:    "new-path/",
			expectedErr: errVolumeNotFound,
		},
		// TestXLStorage case - 13.
		// TestXLStorage case with invalid destination volume name. Length should be at least 3.

// Return used metadata byte slices here.
var metaDataPool = sync.Pool{New: func() interface{} { return make([]byte, 0, metaDataReadDefault) }}

// metaDataPoolGet will return a byte slice with capacity at least metaDataReadDefault.
// It will be length 0.
func metaDataPoolGet() []byte {
	return metaDataPool.Get().([]byte)[:0]
}

// metaDataPoolPut will put an unused small buffer back into the pool.

```

MinIO server also supports [NATS Streaming mode](http://nats.io/documentation/streaming/nats-streaming-intro/) that offers additional functionality like `At-least-once-delivery`, and `Publisher rate limiting`. To configure MinIO server to send notifications to NATS Streaming server, update the MinIO server configuration file as follows:

// There is no minimum size.
var GetByteBuffer = func() []byte {
	b := *internalByteBuffer.Get().(*[]byte)
	return b[:0]
}

// GetByteBufferCap returns a length 0 byte buffer with at least the given capacity.
func GetByteBufferCap(wantSz int) []byte {
	if wantSz < defaultBufferSize {
		b := GetByteBuffer()[:0]
		if cap(b) >= wantSz {
			return b
		}
		PutByteBuffer(b)
	}

streaming compression due to its stability and performance.

This algorithm is specifically optimized for machine generated content.
Write throughput is typically at least 500MB/s per CPU core,
and scales with the number of available CPU cores.
Decompression speed is typically at least 1GB/s.

This means that in cases where raw IO is below these numbers
compression will not only reduce disk usage but also help increase system throughput.

// functionality to handle SSE-C copy requests.
var SSECopy = ssecCopy{}

type ssecCopy struct{}

// IsRequested returns true if the HTTP headers contains
// at least one SSE-C copy header. Regular SSE-C headers
// are ignored.
func (ssecCopy) IsRequested(h http.Header) bool {
	if _, ok := h[xhttp.AmzServerSideEncryptionCopyCustomerAlgorithm]; ok {
		return true
	}