Nonstop Database, HiRDB Version 9 System Operation Guide
When IP addresses are inherited, the host name is the same for the primary system and the secondary system, so no action is required after a system switchover occurs. When IP addresses are not inherited, the host names are different for the primary system and the secondary system, so you need to perform the operations described in the following subsections.
In some cases, the primary system's host name might be displayed in messages.
For details about how statistical information is collected after a system switchover, see 26.6.1(4)(b) Process for collecting statistical information after a system switchover.
When only the host name of the primary system is specified in the PDHOST operand, you must perform the procedure explained in this subsection. This procedure is not necessary in a configuration in which IP addresses are inherited, or when the host names of the primary system and secondary system are both specified in the PDHOST operand of the client environment definition. For details, see 26.2.3 Handling of host names depending on whether IP addresses are inherited.
Because the host name of the HiRDB to be connected is specified in the PDHOST operand, after a system switchover the host name of the running system must be changed in the PDHOST operand. Therefore, after a system switchover, the HiRDB administrator must notify all client users that the host name of HiRDB has changed. Client users must change the host name specified in the PDHOST operand to this new host name, and then re-execute the UAPs. Note that UAPs cannot be executed until the host name specified in the PDHOST operand is changed. For details about the PDHOST operand, see the HiRDB Version 9 UAP Development Guide.
When only the host name of the primary system is specified in the operands listed below, you must perform the procedure explained in this subsection. This procedure is not necessary when the host names of the primary system and secondary system are both specified in the operands listed below in a configuration in which IP addresses are inherited. For details, see 26.2.3 Handling of host names depending on whether IP addresses are inherited.
Because the host name of the HiRDB to be connected is specified in one of these operands, after a system switchover the host name of the running system must be specified in the applicable operand (the host name of the system manager is specified in the PDHOST operand and the host name of a front-end server is specified in the PDFESHOST operand). Therefore, after a system switchover, the HiRDB administrator must notify all client users that the host name of HiRDB has changed. Client users must change the host name specified in the applicable operand to this new host name, and then re-execute the UAPs. Note that UAPs cannot be executed until the host name specified in the applicable operand is changed. For details about the PDHOST operand and the PDFESHOST operand, see the HiRDB Version 9 UAP Development Guide.
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