To use the multi-connection address facility, the -m option of the pdstart operand must be specified in the system common definition.

If you are using the system switchover configuration, even if the IP address of the network used between the HiRDB servers is not inherited, make sure to use a configuration that inherits the IP address of the network used between the HiRDB client and server (the IP address that the client connects to). For an example of a definition in such a case, see (c) HiRDB parallel server configuration (with inheritance of IP addresses during system switchover).

The HiRDB client specifies in the -m and -n options the host name of the HiRDB system to which connection can be established in the network; this does not have to be the host name specified in the pdunit operand.

(a) HiRDB single server configuration

The following figure shows an example of a network configuration and definition using the multi-connection address facility (for a HiRDB single server configuration).

Figure 22-2 Example of network configuration and definition: HiRDB single server configuration

Explanation:

• The host name (HS01) used for the network communications between the HiRDB systems is specified in the -x option of the pdunit operand.
• The host name (he01) in the network that is used between the HiRDB client and the HiRDB single server configuration is specified in the -m option of the pdstart operand.
• The host name (he01) in the network that is used between the HiRDB client and the HiRDB single server configuration is specified in the PDHOST operand in the client environment definition.

(b) HiRDB parallel server configuration

The following figure shows an example of a network configuration and definition using the multi-connection address facility (for a HiRDB parallel server configuration).

Figure 22-3 Example of network configuration and definition: HiRDB parallel server configuration

Explanation:

• The host names (HS01 and HS02) used for the network communications between the HiRDB systems are specified in the -x option of the pdunit operand.
• The host name (he03) in the network that is used between the HiRDB client and the HiRDB system is specified in the -m option of the pdstart operand (for defining the front-end server).
• The host name (he01) where the system manager is located in the network that is used between the HiRDB client and the HiRDB system is specified in the PDHOST operand in the client environment definition.

(c) HiRDB parallel server configuration (with inheritance of IP addresses during system switchover)

The following figure shows an example of a network configuration and definition using the multi-connection address facility (with inheritance of IP addresses during system switchover).

Figure 22-4 Example of network configuration and definition: With inheritance of IP addresses during system switchover

Explanation:

• The host names (HS01 and HS03) used for the network communications between the HiRDB systems are specified in the -x option of the pdunit operand.
• The host name (he04) corresponding to the IP address of the network that is used between the HiRDB client and the HiRDB system is specified in the -m option of the pdstart operand (for defining the front-end server). The -n option is omitted.
• The host name (he01) where the system manager is located in the network that is used between the HiRDB client and the HiRDB system is specified in the PDHOST operand in the client environment definition.

(d) HiRDB parallel server configuration (without inheritance of IP addresses during system switchover)

The following figure shows an example of a network configuration and definition using the multi-connection address facility (without inheritance of IP addresses during system switchover).

Figure 22-5 Example of network configuration and definition: Without inheritance of IP addresses during system switchover

Explanation:

• The host names (HS01 and HS03) used for the network communications between the HiRDB systems are specified in the -x option of the pdunit operand. The host name of the secondary system (HS02) is specified in the -c option.
• The host name (he04) in the network that is used between the HiRDB client and the HiRDB system is specified in the -m option of the pdstart operand (for defining the front-end server). The host name of the secondary system (he03) is specified in the -n option.
• The host name (he01) where the system manager is located in the network that is used between the HiRDB client and the HiRDB system is specified in the PDHOST operand in the client environment definition. The host name of the secondary system (he03) is also specified.