18.3.2.4 Other NDB Cluster Configuration Parameters

18.3.2.4 Other NDB Cluster Configuration Parameters
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The summary tables in this section provide information about parameters used in the [computer], [tcp], [shm], and [sci] sections of a config.ini file for configuring NDB Cluster management nodes. For detailed descriptions and other additional information about individual parameters, see Section 18.3.3.9, “NDB Cluster TCP/IP Connections”, Section 18.3.3.11, “NDB Cluster Shared-Memory Connections”, or Section 18.3.3.12, “SCI Transport Connections in NDB Cluster”, as appropriate.

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 tables 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 18.5 Computer Configuration Parameters

Parameter Name	Type or Units	Restart Type	In Version ... (and later)
	Default Value
	Minimum/Maximum or Permitted Values
`HostName`	name or IP address	N	NDB 7.2.0
	[none]
	...
`Id`	string	IS	NDB 7.2.0
	[none]
	...

Table 18.6 TCP Configuration Parameters

Parameter Name	Type or Units	Restart Type	In Version ... (and later)
	Default Value
	Minimum/Maximum or Permitted Values
`Checksum`	boolean	N	NDB 7.2.0
	false
	true, false
`Group`	unsigned	N	NDB 7.2.0
	55
	0 / 200
`NodeId1`	numeric	N	NDB 7.2.0
	[none]
	...
`NodeId2`	numeric	N	NDB 7.2.0
	[none]
	...
`NodeIdServer`	numeric	N	NDB 7.2.0
	[none]
	...
`OverloadLimit`	bytes	N	NDB 7.2.0
	0
	0 / 4294967039 (0xFFFFFEFF)
`PortNumber`	unsigned	S	NDB 7.2.0
	[none]
	0 / 64K
`Proxy`	string	N	NDB 7.2.0
	[none]
	...
`ReceiveBufferMemory`	bytes	N	NDB 7.2.0
	2M
	16K / 4294967039 (0xFFFFFEFF)
`SendBufferMemory`	unsigned	N	NDB 7.2.0
	2M
	256K / 4294967039 (0xFFFFFEFF)
`SendSignalId`	boolean	N	NDB 7.2.0
	[see text]
	true, false
`TCP_MAXSEG_SIZE`	unsigned	N	NDB 7.2.0
	0
	0 / 2G
`TCP_RCV_BUF_SIZE`	unsigned	N	NDB 7.2.0
	0
	0 / 2G
`TCP_SND_BUF_SIZE`	unsigned	N	NDB 7.2.0
	0
	0 / 2G
`TcpBind_INADDR_ANY`	boolean	N	NDB 7.2.0
	false
	true, false

Table 18.7 Shared Memory Configuration Parameters

Parameter Name	Type or Units	Restart Type	In Version ... (and later)
	Default Value
	Minimum/Maximum or Permitted Values
`Checksum`	boolean	N	NDB 7.2.0
	true
	true, false
`Group`	unsigned	N	NDB 7.2.0
	35
	0 / 200
`NodeId1`	numeric	N	NDB 7.2.0
	[none]
	...
`NodeId2`	numeric	N	NDB 7.2.0
	[none]
	...
`NodeIdServer`	numeric	N	NDB 7.2.0
	[none]
	...
`OverloadLimit`	bytes	N	NDB 7.2.0
	0
	0 / 4294967039 (0xFFFFFEFF)
`PortNumber`	unsigned	S	NDB 7.2.0
	[none]
	0 / 64K
`SendSignalId`	boolean	N	NDB 7.2.0
	false
	true, false
`ShmKey`	unsigned	N	NDB 7.2.0
	[none]
	0 / 4294967039 (0xFFFFFEFF)
`ShmSize`	bytes	N	NDB 7.2.0
	1M
	64K / 4294967039 (0xFFFFFEFF)
`Signum`	unsigned	N	NDB 7.2.0
	[none]
	0 / 4294967039 (0xFFFFFEFF)

Table 18.8 SCI Configuration Parameters

Parameter Name	Type or Units	Restart Type	In Version ... (and later)
	Default Value
	Minimum/Maximum or Permitted Values
`Checksum`	boolean	N	NDB 7.2.0
	false
	true, false
`Group`	unsigned	N	NDB 7.2.0
	15
	0 / 200
`Host1SciId0`	unsigned	N	NDB 7.2.0
	[none]
	0 / 4294967039 (0xFFFFFEFF)
`Host1SciId1`	unsigned	N	NDB 7.2.0
	0
	0 / 4294967039 (0xFFFFFEFF)
`Host2SciId0`	unsigned	N	NDB 7.2.0
	[none]
	0 / 4294967039 (0xFFFFFEFF)
`Host2SciId1`	unsigned	N	NDB 7.2.0
	0
	0 / 4294967039 (0xFFFFFEFF)
`NodeId1`	numeric	N	NDB 7.2.0
	[none]
	...
`NodeId2`	numeric	N	NDB 7.2.0
	[none]
	...
`NodeIdServer`	numeric	N	NDB 7.2.0
	[none]
	...
`OverloadLimit`	bytes	N	NDB 7.2.0
	0
	0 / 4294967039 (0xFFFFFEFF)
`PortNumber`	unsigned	S	NDB 7.2.0
	[none]
	0 / 64K
`SendLimit`	unsigned	N	NDB 7.2.0
	8K
	128 / 32K
`SendSignalId`	boolean	N	NDB 7.2.0
	true
	true, false
`SharedBufferSize`	unsigned	N	NDB 7.2.0
	10M
	64K / 4294967039 (0xFFFFFEFF)

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