21.4.3.4 Defining Computers in an NDB Cluster

The [computer] section has no real significance other than serving as a way to avoid the need of defining host names for each node in the system. All parameters mentioned here are required.

• Id

  Version (or later)	NDB 7.5.0
  Type or units	string
  Default	[...]
  Range	...
  Restart Type	Initial System Restart: Requires a complete shutdown of the cluster, wiping and restoring the cluster file system from a backup, and then restarting the cluster. (NDB 7.5.0)

  This is a unique identifier, used to refer to the host computer elsewhere in the configuration file.

  Important

  The computer ID is not the same as the node ID used for a management, API, or data node. Unlike the case with node IDs, you cannot use NodeId in place of Id in the [computer] section of the config.ini file.

• HostName

  Version (or later)	NDB 7.5.0
  Type or units	name or IP address
  Default	[...]
  Range	...
  Restart Type	Node Restart: Requires a rolling restart of the cluster. (NDB 7.5.0)

  This is the computer's hostname or IP address.

Restart types.  Information about the restart types used by the parameter descriptions in this section is shown in the following table:

Table 21.7 NDB Cluster restart types

Symbol	Restart Type	Description
N	Node	The parameter can be updated using a rolling restart (see Section 21.6.5, “Performing a Rolling Restart of an NDB Cluster”)
S	System	All cluster nodes must be shut down completely, then restarted, to effect a change in this parameter
I	Initial	Data nodes must be restarted using the --initial option