replication is configured, any incoming uploads and metadata changes to versions created on the target, will sync back to the source and be marked as `REPLICA` on the source. AWS, as well as MinIO do not by default sync metadata changes on a object version marked `REPLICA` back to source. This requires a setting in the replication configuration called [replica modification sync](https://aws.amazon.com/about-aws/whats-new/2020/12/amazon-s3-replication-adds-support-two-way-replication/).

For active-active...

	}
	return r.ExistingObjectReplication.Validate()
}

// MetadataReplicate  returns true if object is not a replica or in the case of replicas,
// replica modification sync is enabled.
func (r Rule) MetadataReplicate(obj ObjectOpts) bool {
	if !obj.Replica {
		return true
	}
	return obj.Replica && r.SourceSelectionCriteria.ReplicaModifications.Status == Enabled

		},
		expStatus: replication.Failed,
	},
	{ // 5. replication status for replica version
		name:      "replication status for replica version",
		rs:        ReplicationState{ReplicationStatusInternal: string(replication.Replica)},
		expStatus: replication.Replica,
	},
}

func TestCompositeReplicationStatus(t *testing.T) {
	for i, test := range replicationStateTest {

	for k, v := range o.ErrCounts {
		n.ErrCounts[k] += v
	}
	return n
}

// SRStats has replication stats at site level
type SRStats struct {
	// Total Replica size in bytes
	ReplicaSize int64 `json:"replicaSize"`
	// Total Replica received
	ReplicaCount int64                `json:"replicaCount"`
	M            map[string]*SRStatus `json:"srStatusMap"`

// - replicated size for all objects sent to this target
// - replica size for all objects received from this target
// - replication pending size for all objects pending replication to this target
// - replication failed size for all objects failed replication to this target
// - replica pending count
// - replica failed count
type BucketTargetUsageInfo struct {

	ReplicatedSize int64 `json:"completedReplicationSize"`
	// Total Replica size in bytes
	ReplicaSize int64 `json:"replicaSize"`
	// Total failed operations including metadata updates for various time frames
	Failed madmin.TimedErrStats `json:"failed"`

	// Total number of completed operations
	ReplicatedCount int64 `json:"replicationCount"`
	// Total number of replica received
	ReplicaCount int64 `json:"replicaCount"`

func ParseConfig(reader io.Reader) (*Config, error) {
	config := Config{}
	if err := xml.NewDecoder(io.LimitReader(reader, maxReplicationConfigSize)).Decode(&config); err != nil {
		return nil, err
	}
	// By default, set replica modification to enabled if unset.
	for i := range config.Rules {
		if len(config.Rules[i].SourceSelectionCriteria.ReplicaModifications.Status) == 0 {
			config.Rules[i].SourceSelectionCriteria = SourceSelectionCriteria{

		case replication.Pending, replication.Completed, replication.Failed, replication.Replica: // for backward compatibility
			return replication.StatusType(rs.ReplicationStatusInternal)
		default:
			replStatus := getCompositeReplicationStatus(rs.Targets)
			// return REPLICA status if replica received timestamp is later than replication timestamp
			// provided object replication completed for all targets.

		//  using config 4 - with replica modification sync disabled.
		{ObjectOpts{Name: "xy/c5test", UserTags: "k1=v1", Replica: true}, cfgs[4], false}, // 39. replica syncing disabled, this object is a replica
		{ObjectOpts{Name: "xa/c5test", UserTags: "k1=v1", Replica: false}, cfgs[4], true}, // 40. replica syncing disabled, this object is NOT a replica
	}

	for _, testCase := range testCases {

    }

    /**
     * Gets the number of replicas for the queue index.
     *
     * @return the number of queue replicas
     */
    @Override
    public int getQueueReplicas() {
        return ComponentUtil.getFessConfig().getIndexDocumentCrawlerQueueNumberOfReplicasAsInteger();
    }

    /**
     * Gets the number of replicas for the data index.
     *
     * @return the number of data replicas