// Rebalance operations
			adminRouter.Methods(http.MethodPost).Path(adminVersion + "/rebalance/start").HandlerFunc(adminMiddleware(adminAPI.RebalanceStart, traceAllFlag))
			adminRouter.Methods(http.MethodGet).Path(adminVersion + "/rebalance/status").HandlerFunc(adminMiddleware(adminAPI.RebalanceStatus, traceAllFlag))

// in 'pool.bin', this is eventually used for decommissioning the pool.
func (z *erasureServerPools) Init(ctx context.Context) error {
	// Load rebalance metadata if present
	if err := z.loadRebalanceMeta(ctx); err == nil {
		// Start rebalance routine if we can reload rebalance metadata.
		z.StartRebalance()
	}

	meta := poolMeta{}
	if err := meta.load(ctx, z.serverPools[0], z.serverPools); err != nil {
		return err

	}

	if pools, ok := objAPI.(*erasureServerPools); ok {
		pools.StopRebalance()
	}
}

// LoadRebalanceMeta notifies all peers to load rebalance.bin from object layer.
// Note: Only peers participating in rebalance operation, namely the first node
// in each pool will load rebalance.bin.
func (sys *NotificationSys) LoadRebalanceMeta(ctx context.Context, startRebalance bool) {
	ng := WithNPeers(len(sys.peerClients))

	},
	ErrAdminRebalanceAlreadyStarted: {
		Code:           "XMinioAdminRebalanceAlreadyStarted",
		Description:    "Pool rebalance is already started",
		HTTPStatusCode: http.StatusConflict,
	},
	ErrAdminRebalanceNotStarted: {
		Code:           "XMinioAdminRebalanceNotStarted",
		Description:    "Pool rebalance is not started",
		HTTPStatusCode: http.StatusNotFound,
	},
	ErrMaximumExpires: {

			}
			// Previously we checked if we had quorum on DataDir value.
			// We have removed this check to allow reading objects with different DataDir
			// values in a few drives (due to a rebalance-stop race bug)
			// provided their their etags or ModTimes match.

			if !meta.Deleted && meta.Size != 0 {
				fmt.Fprintf(h, "%v+%v", meta.Erasure.DataBlocks, meta.Erasure.ParityBlocks)

}

func isReplicationPermissionCheck(err error) bool {
	_, ok := err.(ReplicationPermissionCheck)
	return ok
}

// DataMovementOverwriteErr - captures the error when a data movement activity
// like rebalance incorrectly tries to overwrite an object.
type DataMovementOverwriteErr GenericError

func (de DataMovementOverwriteErr) Error() string {
	objInfoStr := fmt.Sprintf("bucket=%s object=%s", de.Bucket, de.Object)

	nSets := make([]int, len(z.serverPools))
	g := errgroup.WithNErrs(len(z.serverPools))
	for index := range z.serverPools {
		// Skip suspended pools or pools participating in rebalance for any new
		// I/O.
		if z.IsSuspended(index) || z.IsPoolRebalancing(index) {
			continue
		}
		pool := z.serverPools[index]
		nSets[index] = pool.setCount
		g.Go(func() error {

// from healObject)
func (fi FileInfo) Healing() bool {
	_, ok := fi.Metadata[xMinIOHealing]
	return ok
}

// SetDataMov marks object (version) as being currently
// in movement, such as decommissioning or rebalance.
func (fi *FileInfo) SetDataMov() {
	if fi.Metadata == nil {
		fi.Metadata = make(map[string]string)
	}
	fi.Metadata[xMinIODataMov] = "true"
}

// DataMov returns true if object is being in movement

// This keeps the cache size at a reasonable size for all buckets.
//
// Whenever a branch is scanned, it is assumed that it will be un-compacted
// before it hits any of the above limits.
// This will make the branch rebalance itself when scanned if the distribution of objects has changed.

// scanDataFolder will scanner the basepath+cache.Info.Name and return an updated cache.

     */
    private void handleNodeAvailable(WitnessNotification notification) {
        log.info("Node available: {}", notification.getResourceName());
        // Node is back online - could rebalance connections
    }

    /**
     * Schedule a reconnection attempt
     *
     * @param delayMs delay in milliseconds
     */
    private void scheduleReconnection(long delayMs) {