MySQL 8.0 Release Notes
MySQL 8.0 Source Code Documentation
All NDB Cluster programs accept the options described in this section, with the following exceptions:
Note
Users of earlier NDB Cluster versions should note that some of
these options have been changed to make them consistent with
one another, and also with mysqld. You can
use the --help option with any NDB Cluster
program—with the exception of
ndb_print_backup_file,
ndb_print_schema_file, and
ndb_print_sys_file—to view a list of
the options which the program supports.
The options in the following table are common to all NDB Cluster executables (except those noted previously in this section).
Table 22.360 Command-line options common to all MySQL NDB Cluster programs
| Format | Description | Added, Deprecated, or Removed |
|---|---|---|
| Directory where character sets are installed | All NDB 8.0 releases |
|
| Set the number of times to retry a connection before giving up | All NDB 8.0 releases |
|
| Time to wait between attempts to contact a management server, in seconds | All NDB 8.0 releases |
|
| Write core on errors (defaults to TRUE in debug builds) | All NDB 8.0 releases |
|
| Enable output from debug calls. Can be used only for versions compiled with debugging enabled | All NDB 8.0 releases |
|
| Read this file after global option files are read | All NDB 8.0 releases |
|
| Read default options from this file | All NDB 8.0 releases |
|
| Also read groups with names ending in this suffix | All NDB 8.0 releases |
|
| Display help message and exit | All NDB 8.0 releases |
|
| Read this path from the login file | All NDB 8.0 releases |
|
|
Set connection string for connecting to ndb_mgmd. Syntax: [nodeid=<id>;][host=]<hostname>[:<port>]. Overrides entries specified in NDB_CONNECTSTRING or my.cnf. | All NDB 8.0 releases |
| Set the host (and port, if desired) for connecting to management server | All NDB 8.0 releases |
|
| Set node id for this node | All NDB 8.0 releases |
|
| Select nodes for transactions in a more optimal way | All NDB 8.0 releases |
|
| Do not read default options from any option file other than login file | All NDB 8.0 releases |
|
| Print the program argument list and exit | All NDB 8.0 releases |
|
| Output version information and exit | All NDB 8.0 releases |
For options specific to individual NDB Cluster programs, see Section 22.4, “NDB Cluster Programs”.
See Section 22.3.3.9.1, “MySQL Server Options for NDB Cluster”, for mysqld options relating to NDB Cluster.
-
Property Value Command-Line Format --character-sets-dir=dir_nameType Directory name Default Value Tells the program where to find character set information.
-
Property Value Command-Line Format --connect-retries=#Type Numeric Default Value 12Minimum Value 0Maximum Value 4294967295This 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.NoteWhen used with ndb_mgm, this option has 3 as its default. See Section 22.4.5, “ndb_mgm — The NDB Cluster Management Client”, for more information.
-
Property Value Command-Line Format --connect-retry-delay=#Type Numeric Default Value 5Minimum Value 1Minimum Value 0Maximum Value 4294967295This option specifies the length of time to wait per attempt a connection before giving up. The number of times to try connecting is set by
--connect-retries. -
Property Value Command-Line Format --core-fileType Boolean Default Value FALSEWrite a core file if the program dies. The name and location of the core file are system-dependent. (For NDB Cluster programs nodes running on Linux, the default location is the program's working directory—for a data node, this is the node's
DataDir.) For some systems, there may be restrictions or limitations. For example, it might be necessary to execute ulimit -c unlimited before starting the server. Consult your system documentation for detailed information.If NDB Cluster was built using the
--debugoption for configure, then--core-fileis enabled by default. For regular builds,--core-fileis disabled by default. -
Property Value Command-Line Format --debug=optionsType String Default Value d:t:O,/tmp/ndb_restore.traceThis option can be used only for versions compiled with debugging enabled. It is used to enable output from debug calls in the same manner as for the mysqld process.
--defaults-extra-file=filenameProperty Value Command-Line Format --defaults-extra-file=filenameType String Default Value [none]Read this file after global option files are read.
For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
-
Property Value Command-Line Format --defaults-file=filenameType String Default Value [none]Read default options from this file.
For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
-
Property Value Command-Line Format --defaults-group-suffixType String Default Value [none]Also read groups with names ending in this suffix.
For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
-
Property Value Command-Line Format --help--usagePrints a short list with descriptions of the available command options.
-
Property Value Command-Line Format --login-path=pathType String Default Value [none]Read this path from the login file.
For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
--ndb-connectstring=,connection_string--connect-string=,connection_string-cconnection_stringProperty Value Command-Line Format --ndb-connectstring=connectstring--connect-string=connectstringType String Default Value localhost:1186This option takes an NDB Cluster connection string that specifies the management server for the application to connect to, as shown here:
shell> ndbd --ndb-connectstring="nodeid=2;host=ndb_mgmd.mysql.com:1186"For more information, see Section 22.3.3.3, “NDB Cluster Connection Strings”.
-
Property Value Command-Line Format --ndb-mgmd-host=host[:port]Type String Default Value localhost:1186Can be used to set the host and port number of a single management server for the program to connect to. If the program requires node IDs or references to multiple management servers (or both) in its connection information, use the
--ndb-connectstringoption instead. -
Property Value Command-Line Format --ndb-nodeid=#Type Numeric Default Value 0Sets this node's NDB Cluster node ID. The range of permitted values depends on the node's type (data, management, or API) and the NDB Cluster software version. See Section 22.1.7.2, “Limits and Differences of NDB Cluster from Standard MySQL Limits”, for more information.
-
Property Value Command-Line Format --no-defaultsType Boolean Default Value TRUEDo not read default options from any option file other than login file.
For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
--ndb-optimized-node-selectionProperty Value Command-Line Format --ndb-optimized-node-selectionType Boolean Default Value TRUEOptimize selection of nodes for transactions. Enabled by default.
-
Property Value Command-Line Format --print-defaultsType Boolean Default Value TRUEPrint the program argument list and exit.
For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
-
Property Value Command-Line Format --versionPrints the NDB Cluster version number of the executable. The version number is relevant because not all versions can be used together, and the NDB Cluster startup process verifies that the versions of the binaries being used can co-exist in the same cluster. This is also important when performing an online (rolling) software upgrade or downgrade of NDB Cluster.
See Section 22.5.5, “Performing a Rolling Restart of an NDB Cluster”), for more information.