// operation, we fetch this info from storage, and refresh the cache as well.
func (store *IAMStoreSys) ListGroups(ctx context.Context) (res []string, err error) {
	cache := store.lock()
	defer store.unlock()

	if store.getUsersSysType() == MinIOUsersSysType {
		m := map[string]GroupInfo{}
		err = store.loadGroups(ctx, m)
		if err != nil {
			return
		}
		cache.iamGroupsMap = m

	}

	loadUserCalled := false
	select {
	case <-sys.configLoaded:
	default:
		sys.store.LoadUser(ctx, name)
		loadUserCalled = true
	}

	userInfo, err := sys.store.GetUserInfo(name)
	if err == errNoSuchUser && !loadUserCalled {
		sys.store.LoadUser(ctx, name)
		userInfo, err = sys.store.GetUserInfo(name)
	}
	return userInfo, err
}

	// setCount * setDriveCount with each memory upto blockSizeV2.
	buffers := bpool.NewBytePoolCap(n, blockSizeV2, blockSizeV2*2)
	buffers.Populate()
	globalBytePoolCap.Store(buffers)

	var localDrives []StorageAPI
	local := endpointServerPools.FirstLocal()
	for i, ep := range endpointServerPools {
		// If storage class is not set during startup, default values are used

		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrSSEEncryptedObject: {
		Code:           "InvalidRequest",
		Description:    "The object was stored using a form of Server Side Encryption. The correct parameters must be provided to retrieve the object.",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrInvalidEncryptionParameters: {
		Code:           "InvalidRequest",

			if HasSuffix(deletePath, SlashSeparator) {
				return errFileNotFound
			}
			// if we have .DS_Store only on macOS
			if runtime.GOOS == globalMacOSName {
				storeFilePath := pathJoin(deletePath, ".DS_Store")
				_, err := Stat(storeFilePath)
				// .DS_Store exists
				if err == nil {
					// delete first
					Remove(storeFilePath)
					// try again
					Remove(deletePath)

	testBuckets := []string{
		// This bucket is used for testing ListObject operations.
		0: "test-bucket-list-object",
		// This bucket will be tested with empty directories
		1: "test-bucket-empty-dir",
		// Will not store any objects in this bucket,
		// Its to test ListObjects on an empty bucket.
		2: "empty-bucket",
		// Listing the case where the marker > last object.
		3: "test-bucket-single-object",
		// Listing uncommon delimiter.

of form `"<user>:<password>@tcp(<host>:<port>)/<database>"`

MinIO supports persistent event store. The persistent store will backup events if MySQL connection goes offline and then replays the stored events when the broken connection comes back up. The event store can be configured by setting a directory path in `queue_dir` field, and the maximum number of events, which can be stored in a `queue_dir`, in `queue_limit` field. For example, `queue_dir` can be set to `/home/events` and `queue_limit`...

				writeErrorResponse(ctx, w, exportError(ctx, err, iamFile, ""), r.URL)
				return
			}
		case allUsersFile:
			userIdentities := make(map[string]UserIdentity)
			err := globalIAMSys.store.loadUsers(ctx, regUser, userIdentities)
			if err != nil {
				writeErrorResponse(ctx, w, exportError(ctx, err, iamFile, ""), r.URL)
				return
			}
			userAccounts := make(map[string]madmin.AddOrUpdateUserReq)

					VersionID: entry.VersionID,
				})
			if err != nil {
				batchLogIf(ctx, err)
				continue
			}

			snowballObj := minio.SnowballObject{
				// Create path to store objects within the bucket.
				Key:       entry.Name,
				Size:      entry.Size,
				ModTime:   entry.ModTime,
				VersionID: entry.VersionID,
				Content:   gr,
				Headers:   make(http.Header),

			objectName:     "fooobject",
			objectTags:     "store+forever=false&factory=true",