The summary table in this section provides information about
parameters used in the [ndb_mgmd] or
[mgm] sections of a
config.ini file for configuring NDB Cluster
management nodes. For detailed descriptions and other additional
information about each of these parameters, see
Section 18.3.3.5, “Defining an NDB Cluster Management Server”.
Restart types. Changes in NDB Cluster configuration parameters do not take effect until the cluster is restarted. The type of restart required to change a given parameter is indicated in the summary table as follows:
N—Node restart: The parameter can
be updated using a rolling restart (see
Section 18.5.5, “Performing a Rolling Restart of an NDB Cluster”).
S—System restart: The cluster must
be shut down completely, then restarted, to effect a change
in this parameter.
I—Initial restart: Data nodes must
be restarted using the
--initial option.
For more information about restart types, see Section 18.3.2, “Overview of NDB Cluster Configuration Parameters, Options, and Variables”.
Table 18.3 Management Node Configuration Parameters
| Parameter Name | Type or Units | Restart Type | In Version ... (and later) |
|---|---|---|---|
| Default Value | |||
| Minimum/Maximum or Permitted Values | |||
| milliseconds | N | NDB 7.3.0 | |
| 0 | |||
| 0 / 4294967039 (0xFFFFFEFF) | |||
| 0-2 | N | NDB 7.3.0 | |
| 1 | |||
| 0 / 2 | |||
| path | N | NDB 7.3.0 | |
| . | |||
| ... | |||
| name | S | NDB 7.3.0 | |
| [none] | |||
| ... | |||
| milliseconds | N | NDB 7.3.3 | |
| 1500 | |||
| 100 / 4294967039 (0xFFFFFEFF) | |||
| string | S | NDB 7.3.0 | |
| [none] | |||
| ... | |||
| name or IP address | N | NDB 7.3.0 | |
| [none] | |||
| ... | |||
| unsigned | IS | NDB 7.3.0 | |
| [none] | |||
| 1 / 255 | |||
| {CONSOLE|SYSLOG|FILE} | N | NDB 7.3.0 | |
| [see text] | |||
| ... | |||
| unsigned | N | NDB 7.3.0 |
| 100 | |||
| 0 / 4294967039 (0xFFFFFEFF) | |||
| unsigned | IS | NDB 7.3.0 | |
| [none] | |||
| 1 / 255 | |||
| unsigned | S | NDB 7.3.0 | |
| 1186 | |||
| 0 / 64K | |||
| unsigned | N | NDB 7.3.0 | |
| [none] | |||
| 0 / 64K | |||
| bytes | N | NDB 7.3.0 | |
| 0 | |||
| 256K / 4294967039 (0xFFFFFEFF) | |||
| boolean | N | NDB 7.3.0 | |
| false | |||
| true, false |
After making changes in a management node's configuration, it is necessary to perform a rolling restart of the cluster for the new configuration to take effect. See Section 18.3.3.5, “Defining an NDB Cluster Management Server”, for more information.
To add new management servers to a running NDB Cluster, it is
also necessary perform a rolling restart of all cluster nodes
after modifying any existing config.ini
files. For more information about issues arising when using
multiple management nodes, see
Section 18.1.6.10, “Limitations Relating to Multiple NDB Cluster Nodes”.