NDB_MGMD(1M) MySQL Database System NDB_MGMD(1M)NAMEndb_mgmd - the management server process
SYNOPSISndb_mgmd options
DESCRIPTION
The management server is the process that reads the cluster
configuration file and distributes this information to all nodes in the
cluster that request it. It also maintains a log of cluster activities.
Management clients can connect to the management server and check the
cluster's status.
As of MySQL 4.1.5, it is no longer necessary to specify a connectstring
when starting the management server. However, if you are using more
than one management server, a connectstring should be provided and each
node in the cluster should specify its node ID explicitly.
See Section 3.4.2, “The Cluster Connectstring”, for information about
using connectstrings. Section 6.2, “Command Options for MySQL Cluster
Processes”, describes other options for ndb_mgmd.
The following files are created or used by ndb_mgmd in its starting
directory. From MySQL 4.1.5, the log and PID files are placed in the
DataDir as specified in the config.ini configuration file. In the list
that follows, node_id is the unique node identifier.
· config.ini is the configuration file for the cluster as a whole.
This file is created by the user and read by the management server.
Section 3, “MySQL Cluster Configuration”, discusses how to set up
this file.
· ndb_node_id_cluster.log (was cluster.log in version 4.1.3) is the
cluster events log file. Examples of such events include checkpoint
startup and completion, node startup events, node failures, and
levels of memory usage. A complete listing of cluster events with
descriptions may be found in Section 7, “Management of MySQL
Cluster”.
When the size of the cluster log reaches one million bytes, the file
is renamed to ndb_node_id_cluster.log.seq_id (was cluster.log.seq_id
in version 4.1.3) where seq_id is the sequence number of the cluster
log file. (For example: If files with the sequence numbers 1, 2, and
3 already exist, the next log file is named using the number 4.)
· ndb_node_id_out.log (was node1.out in version 4.1.3) is the file
used for stdout and stderr when running the management server as a
daemon.
· ndb_node_id.pid (was nodenode_id.pid in version 4.1.3) is the
process ID file used when running the management server as a daemon.
COPYRIGHT
Copyright 2007-2008 MySQL AB
This documentation is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; version 2 of the License.
This documentation is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License along
with the program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see
http://www.gnu.org/licenses/.
SEE ALSO
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/).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────┬────────────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼────────────────────────────────────┤
│Availability │ SUNWmysqlr, SUNWmysqlu, SUNWmysqlt │
├────────────────────┼────────────────────────────────────┤
│Interface Stability │ Obsolete External │
└────────────────────┴────────────────────────────────────┘
NOTES
Source for mysql is available in the SUNWmysqlS package.
MySQL 4.1 04/13/2008 NDB_MGMD(1M)
