NewPutObjReader(hr),
				ObjectOptions{
					PreserveETag: part.ETag, // Preserve original ETag to ensure same metadata.
					IndexCB: func() []byte {
						return part.Index // Preserve part Index to ensure decompression works.
					},
					NoAuditLog: true,
				})
			if err != nil {
				return fmt.Errorf("decommissionObject: PutObjectPart() %w", err)
			}
			parts[i] = CompletePart{
				ETag:           pi.ETag,

	}

	if lc, err := globalLifecycleSys.Get(objInfo.Bucket); err == nil {
		lc.SetPredictionHeaders(w, objInfo.ToLifecycleOpts())
	}

	if v, ok := objInfo.UserDefined[ReservedMetadataPrefix+"compression"]; ok {
		if i := strings.LastIndexByte(v, '/'); i >= 0 {
			v = v[i+1:]
		}
		w.Header()[xhttp.MinIOCompressed] = []string{v}
	}

	return nil

	PrefixEnabledFn func(prefix string) bool // function which returns true if versioning is enabled on prefix

	// IndexCB will return any index created but the compression.
	// Object must have been read at this point.
	IndexCB func() []byte

	// InclFreeVersions indicates that free versions need to be included
	// when looking up a version by fi.VersionID
	InclFreeVersions bool

// content. However, there are many exceptions to this rule.
//
// # Single-part Upload
//
// In case of a basic single-part PUT operation - without server
// side encryption or object compression - the ETag of an object
// is its content MD5.
//
// # Multi-part Upload
//
// The ETag of an object does not correspond to its content MD5
// when the object is uploaded in multiple parts via the S3

MINIO_NOTIFY_KAFKA_VERSION                     (string)                    specify the version of the Kafka cluster e.g. '2.2.0'
MINIO_NOTIFY_KAFKA_PRODUCER_COMPRESSION_CODEC  (none|snappy|gzip|lz4|zstd) compression codec for producer messages
MINIO_NOTIFY_KAFKA_PRODUCER_COMPRESSION_LEVEL  (number)                    compression level for producer messages, defaults to '0'
```

	"github.com/tinylib/msgp/msgp"
	"github.com/valyala/bytebufferpool"
)

// metadata stream format:
//
// The stream is s2 compressed.
// https://github.com/klauspost/compress/tree/master/s2#s2-compression
// This ensures integrity and reduces the size typically by at least 50%.
//
// All stream elements are msgpack encoded.
//
// 1 Integer, metacacheStreamVersion of the writer.

	case size == 0:
		buffer = make([]byte, 1) // Allocate at least a byte to reach EOF
	case size == -1:
		if size := data.ActualSize(); size > 0 && size < fi.Erasure.BlockSize {
			// Account for padding and forced compression overhead and encryption.
			buffer = make([]byte, data.ActualSize()+256+32+32, data.ActualSize()*2+512)
		} else {
			buffer = globalBytePoolCap.Load().Get()
			defer globalBytePoolCap.Load().Put(buffer)
		}

	PartActualSizes    []int64           `json:"PartASizes,omitempty" msg:"PartASizes,allownil"` // Part ActualSizes (compression)
	PartIndices        [][]byte          `json:"PartIndices,omitempty" msg:"PartIdx,omitempty"`  // Part Indexes (compression)
	Size               int64             `json:"Size" msg:"Size"`                                // Object version size

		compressionCodecEnv := target.EnvKafkaProducerCompressionCodec
		if k != config.Default {
			compressionCodecEnv = compressionCodecEnv + config.Default + k
		}
		kafkaArgs.Producer.Compression = env.Get(compressionCodecEnv, kv.Get(target.KafkaCompressionCodec))

		compressionLevelEnv := target.EnvKafkaProducerCompressionLevel
		if k != config.Default {

			}

			// See if the new object is formed.
			// testing whether the copy was successful.
			// Note that this goes directly to the file system,
			// so encryption/compression may interfere at some point.
			buffers[0].Reset()
			r, err := obj.GetObjectNInfo(context.Background(), testCase.bucketName, testCase.newObjectName, nil, nil, opts)
			if err != nil {