func NewS3PeerSys(endpoints EndpointServerPools) *S3PeerSys {
	return &S3PeerSys{
		peerClients: newPeerS3Clients(endpoints),
		poolsCount:  len(endpoints),
	}
}

// HealBucket - heals buckets at node level
func (sys *S3PeerSys) HealBucket(ctx context.Context, bucket string, opts madmin.HealOpts) (madmin.HealResultItem, error) {
	g := errgroup.WithNErrs(len(sys.peerClients))

	for idx, client := range sys.peerClients {

	defer func() {
		tracker.setObject("")
		tracker.setBucket("")
		healingLogIf(ctx, tracker.update(ctx))
	}()

	for _, bucket := range healBuckets {
		if err := bgSeq.healBucket(objAPI, bucket, true); err != nil {
			// Log bucket healing error if any, we shall retry again.
			healingLogIf(ctx, err)
		}
	}

	info, err := tracker.disk.DiskInfo(ctx, DiskInfoOptions{})
	if err != nil {

		return buckets[i].Created.After(buckets[j].Created)
	})

	for _, bucket := range buckets {
		if err = h.healBucket(objAPI, bucket.Name, false); err != nil {
			return err
		}
	}

	return nil
}

// healBucket - traverses and heals given bucket
func (h *healSequence) healBucket(objAPI ObjectLayer, bucket string, bucketsOnly bool) error {

			// Sleep and stagger to avoid blocked CPU and thundering
			// herd upon start up sequence.
			time.Sleep(25*time.Millisecond + time.Duration(rand.Int63n(int64(100*time.Millisecond))))

			_, _ = sys.objAPI.HealBucket(ctx, buckets[index], madmin.HealOpts{Recreate: true})
			meta, err := loadBucketMetadata(ctx, sys.objAPI, buckets[index])
			if err != nil {
				return err
			}
			bucketMetas[index] = meta
			return nil

	SetDriveCounts() []int                              // list of erasure stripe size for each pool in order.

	// Healing operations.
	HealFormat(ctx context.Context, dryRun bool) (madmin.HealResultItem, error)
	HealBucket(ctx context.Context, bucket string, opts madmin.HealOpts) (madmin.HealResultItem, error)
	HealObject(ctx context.Context, bucket, object, versionID string, opts madmin.HealOpts) (madmin.HealResultItem, error)

	if z.SinglePool() {
		return errInvalidArgument
	}

	decomBuckets, err := z.getBucketsToDecommission(ctx)
	if err != nil {
		return err
	}

	for _, bucket := range decomBuckets {
		z.HealBucket(ctx, bucket.Name, madmin.HealOpts{})
	}

	// Create .minio.sys/config, .minio.sys/buckets paths if missing,
	// this code is present to avoid any missing meta buckets on other
	// pools.