Table 6-32 shows the relationships among environment variables and connection types for connecting with the HiRDB server.

Table 6-32 Relationships between environment variables and connection types

Environment variable	HiRDB/Single Server		HiRDB/Parallel Server
			Single front-end server		Multiple front-end servers
	Normal	High- speed	Normal	High- speed	Normal	Connection with specific front-end server
						FES-host direct	High- speed
PDHOST	S	S	S	S	S	S	S
PDFESHOST				S		S	S
PDNAMEPORT	S	S	S	S	S	S	S
PDSERVICEPORT		S		S			S
PDSERVICEGRP		S		S		S	S
PDSRVTYPE

S: Must be specified.

: Must be specified if the HiRDB server is the Linux or Windows version.

: Does not have to be specified.

Notes

1. The connection format in which all required environment variables are specified is selected in the priority order of high-speed connection, FES-host direct connection, and normal connection. Unnecessary environment variables are not used.
2. The following relationships apply to the connection time to the HiRDB server:
   Normal connection time > FES-host direct connection time > high-speed connection time
   A high-speed connection is recommended if you want to shorten the connection time. A normal connection is recommended if you want to use the connected front-end server efficiently.