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in the send buffer. This feature ensures that messages are not corrupted while waiting in the send buffer, or by the transport mechanism. 

• Group 

When ndb_optimized_node_selection  is enabled, node proximity is used in some cases to select which node to connect to. This parameter can be used to influence proximity by setting it to a lower value, which is interpreted as “closer” . See the description of the system variable for more information. 

• HostName1 

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The HostName1  and HostName2  parameters can be used to specify specific network interfaces to be used for a given TCP connection between two nodes. The values used for these parameters can be host names or IP addresses. 

• HostName2 

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The HostName1  and HostName2  parameters can be used to specify specific network interfaces to be used for a given TCP connection between two nodes. The values used for these parameters can be host names or IP addresses. 

• NodeId1 

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To identify a connection between two nodes it is necessary to provide their node IDs in the [tcp] section of the configuration file as the values of NodeId1  and NodeId2 . These are the same unique Id values for each of these nodes as described in Section 23.3.3.7, “Defining SQL and Other API Nodes in an NDB Cluster” . 

• NodeId2 

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