When a HiRDB expansion unit is defined, HiRDB start processing completion and system switchover take longer than when no HiRDB expansion unit is defined. Therefore, the following actions must be taken:

• Activate the IP address that corresponds to the host name used by a HiRDB expansion unit (specified in the -x and -c options of the pdunit operand of the system common definition) on a different server machine from the one on which HiRDB is located. When doing so, do not use the port number to be specified in the pdunit operand in another application.
• When you start the HiRDB expansion unit, first deactivate the IP address that you activated on the other server machine, and then activate it on the server machine on which the HiRDB expansion unit is to be started.

Once HiRDB expansion units have been defined, the commands listed in the table below must be executed in each unit. If a command is executed on the entire system, command execution may take a long time, or the command may terminate in an error.

Table 29-4 Command execution unit when HiRDB expansion units are defined

Command name	Execution unit
pdbufls	Server
pdbufmod#	RDAREA
pdchprc	Unit
pdclibsync	Host
pdclose	RDAREA
pdclttrc	Unit
pdconfchk	Unit
pdcopy	Server or RDAREA
pddbfrz	RDAREA
pddbls	Server or RDAREA
pddbst	RDAREA
pdhold	RDAREA
pdjarsync	Host
pdls -d act	Unit and server
pdls -d aud	Unit
pdls -d ha	Unit or server
pdls -d lck	Unit and server
pdls -d org	Unit and server
pdls -d prc	Unit and server
pdls -d rpl	Unit and server
pdls -d scd	Unit and server
pdls -d stj	Unit and server
pdls -d svr	Unit
pdls -d trn	Unit and server
pdobils	Server
pdopen	RDAREA
pdpfresh	Server
pdrels	RDAREA
pdrstr	Server or RDAREA
pdstbegin	Unit and server
pdstend	Unit and server

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When the pdbufmod command is executed, HiRDB accesses all servers including HiRDB expansion units in order to collect global buffer information. Therefore, if there is a stopped HiRDB expansion unit, the RPC communication error message KFPH00132-E (code = -7) is output. However, if message KFPH00110-I is output, processing of the pdbufmod command is completed. In this case, ignore message KFPH00132-E.