# Automatic Site Replication

This feature allows multiple independent MinIO sites (or clusters) that are using the same external IDentity Provider (IDP) to be configured as replicas. In this situation the set of replica sites are referred to as peer sites or just sites. When site-replication is enabled on a set of sites, the following changes are replicated to all other sites:

- Creation and deletion of buckets and objects

				continue
			}
			newEvent.S3.Object.UserMetadata[k] = v
		}
	}

	return newEvent
}

func sendEvent(args eventArgs) {
	// avoid generating a notification for REPLICA creation event.
	if _, ok := args.ReqParams[xhttp.MinIOSourceReplicationRequest]; ok {
		return
	}

	args.Object.Size, _ = args.Object.GetActualSize()

	// remove sensitive encryption entries in metadata.

  TFE_Op* matmul = MatMulOp(ctx, m1, m2);
  TFE_OpSetDevice(matmul, "/job:localhost/replica:0/task:0/device:CPU:0",
                  status);
  ASSERT_EQ(TF_OK, TF_GetCode(status)) << TF_Message(status);
  TFE_Op* matmul2 = MatMulOp(ctx, m1, m1);
  TFE_OpSetDevice(matmul2, "/job:localhost/replica:0/task:0/device:CPU:0",
                  status);
  ASSERT_EQ(TF_OK, TF_GetCode(status)) << TF_Message(status);

// custom devices will fail.
//
// `device_name` must not name an existing physical or custom device. It must
// follow the format:
//
//    /job:<name>/replica:<replica>/task:<task>/device:<type>:<device_num>
//
// If the device is successfully registered, `status` is set to TF_OK. Otherwise
// the device is not usable. In case of a bad status, `device.delete_device` is

  // chosen for the operation by the device placement logic in the
  // executor. After that, the value returned by DeviceName will be a full
  // device name such as "/job:localhost/replica:0/task:0/device:GPU:1".
  virtual const string& DeviceName() const = 0;

  // Sets the operation device name.
  //
  // The given `name` must be parseable by DeviceNameUtils::ParseFullName, and

		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrReplicationPermissionCheckError), r.URL)
		return
	}

	replica := r.Header.Get(xhttp.AmzBucketReplicationStatus) == replication.Replica.String()
	if replica {
		if s3Error := checkRequestAuthType(ctx, r, policy.ReplicateDeleteAction, bucket, object); s3Error != ErrNone {
			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)

func (r *ReplicationStats) Delete(bucket string) {
	if r == nil {
		return
	}

	r.Lock()
	defer r.Unlock()
	delete(r.Cache, bucket)
}

// UpdateReplicaStat updates in-memory replica statistics with new values.
func (r *ReplicationStats) UpdateReplicaStat(bucket string, n int64) {
	if r == nil {
		return
	}

	r.Lock()
	defer r.Unlock()
	bs, ok := r.Cache[bucket]
	if !ok {

	// Header indicates if its a GET/HEAD proxy request for active-active replication
	MinIOSourceProxyRequest = "X-Minio-Source-Proxy-Request"
	// Header indicates that this request is a replication request to create a REPLICA
	MinIOSourceReplicationRequest = "X-Minio-Source-Replication-Request"
	// Header checks replication permissions without actually completing replication
	MinIOSourceReplicationCheck = "X-Minio-Source-Replication-Check"

	ReplicationTimestamp = "replication-timestamp"
	// ReplicaStatus - this header is present if a replica was received by this cluster for this object version
	ReplicaStatus = "replica-status"
	// ReplicaTimestamp - the last time a replica was received by this cluster for this object version
	ReplicaTimestamp = "replica-timestamp"
	// TaggingTimestamp - the last time a tag metadata modification happened on this cluster for this object version

	([kubernetes/features#82](https://github.com/kubernetes/enhancements/issues/82))
  - [beta] `Federated Replica Sets` create and maintain matching
    `Replica Set`s in some or all clusters in a federation, with the
    desired replica count distributed equally or according to
    specified per-cluster weights.
	([docs](http://kubernetes.io/docs/user-guide/federation/federated-replicasets.md))