ndb__mgmd(1)
NAME
ndb_mgmd - the management server process
SYNOPSIS
ndb_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.
It is not strictly 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 5.2, "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, and 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 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 6, "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, 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 is the file used for stdout and stderr when
- running the management server as a daemon.
- · ndb_node_id.pid 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/).