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NDB_CONFIG(1)
NAME
ndb_config - extract NDB configuration information
SYNOPSIS
ndb_config options
DESCRIPTION
This tool extracts configuration information for data nodes, SQL nodes, and
API nodes from a cluster management node (and possibly its config.ini
file).
Usage:
ndb_config options
The options available for this utility differ somewhat from those used with
the other utilities, and so are listed in their entirety in the next
section, followed by some examples.
Options:
· --usage, --help, or -?
Causes ndb_config to print a list of available options, and then exit.
· --version, -V
Causes ndb_config to print a version information string, and then exit.
· --ndb-connectstring=connect_string
Specifies the connectstring to use in connecting to the management
server. The format for the connectstring is the same as described in
Section 4.4.2, The Cluster connectstring, and defaults to
localhost:1186.
The use of -c as a short version for this option is supported for
ndb_config beginning with MySQL 5.0.29.
· --config-file=path-to-file
Gives the path to the management server's configuration file
(config.ini). This may be a relative or absolute path. If the management
node resides on a different host from the one on which ndb_config is
invoked, then an absolute path must be used.
· --query=query-options, -q query-options
This is a comma-delimited list of query options - that is, a list of one
or more node attributes to be returned. These include id (node ID), type
(node type - that is, ndbd, mysqld, or ndb_mgmd), and any configuration
parameters whose values are to be obtained.
For example, --query=id,type,indexmemory,datamemory would return the
node ID, node type, DataMemory, and IndexMemory for each node.
Note: If a given parameter is not applicable to a certain type of node,
than an empty string is returned for the corresponding value. See the
examples later in this section for more information.
· --host=hostname
Specifies the hostname of the node for which configuration information
is to be obtained.
· --id=node_id, --nodeid=node_id
Used to specify the node ID of the node for which configuration
information is to be obtained.
· --nodes
(Tells ndb_config to print information from parameters defined in [ndbd]
sections only. Currently, using this option has no affect, since these
are the only values checked, but it may become possible in future to
query parameters set in [tcp] and other sections of cluster
configuration files.)
· --type=node_type
Filters results so that only configuration values applying to nodes of
the specified node_type (ndbd, mysqld, or ndb_mgmd) are returned.
· --fields=delimiter, -f delimiter
Specifies a delimiter string used to separate the fields in the result.
The default is , (the comma character).
Note: If the delimiter contains spaces or escapes (such as \n for the
linefeed character), then it must be quoted.
· --rows=separator, -r separator
Specifies a separator string used to separate the rows in the result.
The default is a space character.
Note: If the separator contains spaces or escapes (such as \n for the
linefeed character), then it must be quoted.
Examples:
1. To obtain the node ID and type of each node in the cluster:
shell> ./ndb_config --query=id,type --fields=':' --rows='\n'
1:ndbd
2:ndbd
3:ndbd
4:ndbd
5:ndb_mgmd
6:mysqld
7:mysqld
8:mysqld
9:mysqld
In this example, we used the --fields options to separate the ID and type
of each node with a colon character (:), and the --rows options to place
the values for each node on a new line in the output.
2. To produce a connectstring that can be used by data, SQL, and API nodes
to connect to the management server:
shell> ./ndb_config --config-file=usr/local/mysql/cluster-data/config.ini --query=hostname,portnumber --fields=: --rows=, --type=ndb_mgmd
192.168.0.179:1186
3. This invocation of ndb_config checks only data nodes (using the --type
option), and shows the values for each node's ID and hostname, and its
DataMemory, IndexMemory, and DataDir parameters:
shell> ./ndb_config --type=ndbd --query=id,host,datamemory,indexmemory,datadir -f ' : ' -r '\n'
1 : 192.168.0.193 : 83886080 : 18874368 : /usr/local/mysql/cluster-data
2 : 192.168.0.112 : 83886080 : 18874368 : /usr/local/mysql/cluster-data
3 : 192.168.0.176 : 83886080 : 18874368 : /usr/local/mysql/cluster-data
4 : 192.168.0.119 : 83886080 : 18874368 : /usr/local/mysql/cluster-data
In this example, we used the short options -f and -r for setting the field
delimiter and row separator, respectively.
4. To exclude results from any host except one in particular, use the
--host option:
shell> ./ndb_config --host=192.168.0.176 -f : -r '\n' -q id,type
3:ndbd
5:ndb_mgmd
In this example, we also used the short form -q to determine the attributes
to be queried.
Similarly, you can limit results to a node with a specific ID using the
--id or --nodeid option.
COPYRIGHT
Copyright 1997-2007 MySQL AB
This documentation is NOT distributed under a GPL license. Use of this
documentation is subject to the following terms: You may create a printed
copy of this documentation solely for your own personal use. Conversion to
other formats is allowed as long as the actual content is not altered or
edited in any way. You shall not publish or distribute this documentation
in any form or on any media, except if you distribute the documentation in
a manner similar to how MySQL disseminates it (that is, electronically for
download on a Web site with the software) or on a CD-ROM or similar medium,
provided however that the documentation is disseminated together with the
software on the same medium. Any other use, such as any dissemination of
printed copies or use of this documentation, in whole or in part, in
another publication, requires the prior written consent from an authorized
representative of MySQL AB. MySQL AB reserves any and all rights to this
documentation not expressly granted above.
Please email <docs@mysql.com> for more information.
SEE ALSO
make_win_bin_dist(1), msql2mysql(1), my_print_defaults(1),
myisam_ftdump(1), myisamchk(1), myisamlog(1), myisampack(1), mysql(1),
mysql.server(1), mysql_config(1), mysql_explain_log(1),
mysql_fix_privilege_tables(1), mysql_install_db(1), mysql_tzinfo_to_sql(1),
mysql_upgrade(1), mysql_zap(1), mysqlaccess(1), mysqladmin(1),
mysqlbinlog(1), mysqlcheck(1), mysqld(8), mysqld_multi(1), mysqld_safe(1),
mysqldump(1), mysqlhotcopy(1), mysqlimport(1), mysqlmanager(8),
mysqlshow(1), ndb_cpcd(1), ndb_delete_all(1), ndb_desc(1),
ndb_drop_index(1), ndb_drop_table(1), ndb_error_reporter(1), ndb_mgm(1),
ndb_mgmd(1), ndb_print_backup_file(1), ndb_print_schema_file(1),
ndb_print_sys_file(1), ndb_restore(1), ndb_select_all(1),
ndb_select_count(1), ndb_show_tables(1), ndb_size.pl(1), ndb_waiter(1),
ndbd(1), perror(1), replace(1), safe_mysqld(1)
For more information, please refer to the MySQL Reference Manual, which may
already be installed locally and which is also available online at
http://dev.mysql.com/doc/.
AUTHOR
MySQL AB (http://www.mysql.com/). This software comes with no warranty.
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