const (
	siteResyncPrefix = bucketMetaPrefix + "/site-replication/resync"
)

type resyncState struct {
	resyncID  string
	LastSaved time.Time
}

//msgp:ignore siteResyncMetrics
type siteResyncMetrics struct {
	sync.RWMutex
	// resyncStatus maps resync ID to resync status for peer
	resyncStatus map[string]SiteResyncStatus
	// map peer deployment ID to resync ID
	peerResyncMap map[string]resyncState
}

	arn          string
	resyncID     string
	resyncBefore time.Time
}

// ResyncStatusType status of resync operation
type ResyncStatusType int

const (
	// NoResync - no resync in progress
	NoResync ResyncStatusType = iota
	// ResyncPending - resync pending
	ResyncPending
	// ResyncCanceled - resync canceled
	ResyncCanceled
	// ResyncStarted -  resync in progress
	ResyncStarted

		OpType:   "start",
		ResyncID: rs.ResyncID,
		Buckets:  res.Buckets,
	}
	if len(res.Buckets) > 0 {
		res.ErrDetail = "partial failure in starting site resync"
	}
	if len(buckets) != 0 && len(res.Buckets) == len(buckets) {
		return res, fmt.Errorf("all buckets resync failed")
	}
	return res, nil
}

// cancelResync stops an ongoing site level resync for the peer specified.

replicated objects to the DR cluster need to be re-replicated, `mc replicate resync start alias/bucket --remote-bucket <arn>` can be used to initiate a reset. This would initiate a re-sync between the two clusters by walking the bucket namespace and replicating eligible objects that satisfy the existing objects replication rule specified in the replication config. The status of the resync operation can be viewed with `mc replicate resync status alias/bucket --remote-bucket <arn>`.

Note that Ex...

		defer rc.Close()
		var data [4]byte
		n, err := rc.Read(data[:])
		if err != nil {
			return err
		}
		if n != len(data) {
			return errors.New("heal mrf: no data")
		}
		// Read resync meta header
		switch binary.LittleEndian.Uint16(data[0:2]) {
		case healMRFMetaFormat:
		default:
			return fmt.Errorf("heal mrf: unknown format: %d", binary.LittleEndian.Uint16(data[0:2]))
		}

		adminRouter.Methods(http.MethodPut).Path(adminVersion + "/site-replication/peer/remove").HandlerFunc(adminMiddleware(adminAPI.SRPeerRemove))
		adminRouter.Methods(http.MethodPut).Path(adminVersion+"/site-replication/resync/op").HandlerFunc(adminMiddleware(adminAPI.SiteReplicationResyncOp)).Queries("operation", "{operation:.*}")

		adminLogIf(ctx, err)
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}
}

// SiteReplicationResyncOp - PUT /minio/admin/v3/site-replication/resync/op
func (a adminAPIHandlers) SiteReplicationResyncOp(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	objectAPI, _ := validateAdminReq(ctx, w, r, policy.SiteReplicationResyncAction)
	if objectAPI == nil {

		// Initialize bucket metadata sub-system.
		bootstrapTrace("globalBucketMetadataSys.Init", func() {
			globalBucketMetadataSys.Init(GlobalContext, buckets, newObject)
		})

		// initialize replication resync state.
		bootstrapTrace("initResync", func() {
			globalReplicationPool.Get().initResync(GlobalContext, buckets, newObject)
		})

		// Initialize site replication manager after bucket metadata

- Client-go: Informer resync processing improved handling of Resync handling. This reduces contention on store locks between incoming events and handler updates, which may result in observable timing differences of handler invocations. This behavior is guarded by an AtomicFIFO feature gate. This...