--backup-password-from-stdin[=TRUE|FALSE]

此选项启用在使用 --execute "START BACKUP" 或类似命令创建备份时，从系统 shell (stdin) 输入备份密码。使用此选项需要同时使用 --execute。This option enables input of the backup password from the system shell (stdin) when using --execute "START BACKUP" or similar to create a backup. Use of this option requires use of --execute as well.

--character-sets-dir

包含字符集的目录。Directory containing character sets.

--connect-retries=#

此选项指定在第一次尝试后重试连接的次数，直到放弃（客户端总是至少尝试一次连接）。每次尝试的等待时间使用 --connect-retry-delay 设置。This option specifies the number of times following the first attempt to retry a connection before giving up (the client always tries the connection at least once). The length of time to wait per attempt is set using --connect-retry-delay.

此选项与 --try-reconnect 选项同义，后者现已弃用。This option is synonymous with the --try-reconnect option, which is now deprecated.

--connect-retry-delay

尝试联系管理服务器之间等待的秒数。Number of seconds to wait between attempts to contact management server.

--connect-string

与 --ndb-connectstring 相同。Same as --ndb-connectstring.

--core-file

错误时生成核心文件；用于调试。Write core file on error; used in debugging.

--defaults-extra-file

在读取全局文件之后读取给定文件。Read given file after global files are read.

--defaults-file

仅从指定文件读取默认选项。Read default options from given file only.

--defaults-group-suffix

也读取组合了 concat(group, suffix) 的组。Also read groups with concat(group, suffix).

--encrypt-backup

使用此选项时，所有备份都将被加密。要在每次运行 ndb_mgm 时都实现此功能，请将该选项放入 my.cnf 文件的 [ndb_mgm] 部分。When used, this option causes all backups to be encrypted. To make this happen whenever ndb_mgm is run, put the option in the [ndb_mgm] section of the my.cnf file.

--execute=command, -e command --execute=command, -e command

此选项可用于从系统 shell 向 NDB Cluster 管理客户端发送命令。例如，以下任意一种方式都等同于在管理客户端中执行 SHOW：This option can be used to send a command to the NDB Cluster management client from the system shell. For example, either of the following is equivalent to executing SHOW in the management client:

$> ndb_mgm -e "SHOW"

$> ndb_mgm --execute="SHOW"

这类似于 --execute 或 -e 选项在 mysql 命令行客户端中的作用。参见 第 6.2.2.1 节，“在命令行中使用选项”。This is analogous to how the --execute or -e option works with the mysql command-line client. See Section 6.2.2.1, “Using Options on the Command Line”.

--help

显示帮助文本并退出。Display help text and exit.

--login-path

从登录文件读取给定路径。Read given path from login file.

--no-login-paths

跳过从登录路径文件读取选项。Skips reading options from the login path file.

--ndb-connectstring

设置用于连接到 ndb_mgmd 的连接字符串。语法：[nodeid=id;][host=]hostname[:port]。覆盖 NDB_CONNECTSTRING 和 my.cnf 中的条目。Set connect string for connecting to ndb_mgmd. Syntax: [nodeid=id;][host=]hostname[:port]. Overrides entries in NDB_CONNECTSTRING and my.cnf.

--ndb-nodeid

为此节点设置节点 ID，以覆盖由 --ndb-connectstring 设置的任何 ID。Set node ID for this node, overriding any ID set by --ndb-connectstring.

--ndb-mgm-tls

设置连接到管理服务器所需的 TLS 支持级别；可以是 relaxed 或 strict。relaxed（默认）表示尝试建立 TLS 连接，但不要求成功；strict表示连接必须使用 TLS。Sets the level of TLS support required to connect to the management server; one of relaxed or strict. relaxed (the default) means that a TLS connection is attempted, but success is not required; strict means that TLS is required to connect.

--ndb-mgmd-host

与 --ndb-connectstring 相同。Same as --ndb-connectstring.

--ndb-optimized-node-selection

启用事务节点选择的优化。默认启用；使用 --skip-ndb-optimized-node-selection 来禁用。Enable optimizations for selection of nodes for transactions. Enabled by default; use --skip-ndb-optimized-node-selection to disable.

--ndb-tls-search-path

指定用于搜索 CA 文件的目录列表。在 Unix 平台上，目录名称用冒号 (:) 分隔；在 Windows 系统上，使用分号 (;) 作为分隔符。目录引用可以是相对路径或绝对路径；它可以包含一个或多个环境变量，每个变量以美元符号 ($) 开头，并在使用前进行展开。Specify a list of directories to search for a CA file. On Unix platforms, the directory names are separated by colons (:); on Windows systems, the semicolon character (;) is used as the separator. A directory reference may be relative or absolute; it may contain one or more environment variables, each denoted by a prefixed dollar sign ($), and expanded prior to use.

搜索从最左边的命名目录开始，按从左到右的顺序进行，直到找到文件。空字符串表示空搜索路径，这会导致所有搜索失败。由单个点 (.) 组成的字符串表示搜索路径仅限于当前工作目录。Searching begins with the leftmost named directory and proceeds from left to right until a file is found. An empty string denotes an empty search path, which causes all searches to fail. A string consisting of a single dot (.) indicates that the search path limited to the current working directory.

如果未提供搜索路径，则使用编译时的默认值。此值取决于所使用的平台：在 Windows 上，它是 \ndb-tls；在其他平台（包括 Linux）上，它是 $HOME/ndb-tls。可以通过使用 -DWITH_NDB_TLS_SEARCH_PATH 编译 NDB Cluster 来覆盖该值。If no search path is supplied, the compiled-in default value is used. This value depends on the platform used: On Windows, this is \ndb-tls; on other platforms (including Linux), it is $HOME/ndb-tls. This can be overridden by compiling NDB Cluster using -DWITH_NDB_TLS_SEARCH_PATH.

--no-defaults

除了登录文件之外，不从任何配置文件读取默认选项。Do not read default options from any option file other than login file.

--print-defaults

打印程序参数列表然后退出。Print program argument list and exit.

--test-tls

使用 TLS 连接，然后退出。如果成功，输出类似如下所示：Connect using TLS, then exit. Output if successful is similar to what is shown here:

>$ ndb_mgm --test-tls
Connected to Management Server at: sakila:1186
>$

有关更多信息，请参见 第 25.6.19.5 节，“NDB 集群的 TLS 链接加密”。See Section 25.6.19.5, “TLS Link Encryption for NDB Cluster”, for more information.

--try-reconnect=number

如果与管理服务器的连接中断，节点会每隔 5 秒尝试重新连接，直到成功。通过使用此选项，可以在放弃并报告错误之前，将尝试次数限制为 number。If the connection to the management server is broken, the node tries to reconnect to it every 5 seconds until it succeeds. By using this option, it is possible to limit the number of attempts to number before giving up and reporting an error instead.

此选项已弃用，并可能在将来的版本中移除。请使用 --connect-retries。This option is deprecated and subject to removal in a future release. Use --connect-retries, instead.

--usage

显示帮助文本并退出；与 --help 相同。Display help text and exit; same as --help.

--version

显示版本信息并退出。Display version information and exit.