Assign names to paired logical volume groups according to the naming rules described in the following table.

Table 2-7 Naming rules for paired logical volume groups

File classification	Real Time SAN Replication processing method
	All synchronous or hybrid method	All asynchronous method
DB	aaaa_bb....bb_DB	aaaa_ALL Assign a single paired logical volume group to all file classifications.
LOG	aaaa_bb....bb_LOG
SPD	aaaa_bb....bb_SPD
USTS	aaaa_cccc_USTS
SSTS	aaaa_bb....bb_SSTS

Legend:

aaaa: HiRDB identifier

bb....bb: Server name

cccc: Unit identifier

In the all synchronous and hybrid methods, if paired logical volumes are designed correctly, the file classifications of the files located in the paired logical volumes, and the units and servers that use these files, will all be identical. If file classifications, or the units or servers used, are different, check the notes in 2.4.2 Notes on creating HiRDB file system areas.

Place the update-copy target files (HiRDB file system area) on a paired logical volume group (paired logical volume). The following figure shows a configuration example of file locations using the all synchronous or hybrid method.

Figure 2-1 File location configuration example

Legend:

HRD1: HiRDB identifier

UNT1: Unit identifier

sds1: Server name

RD: User RDAREA file

MAST: Master directory RDAREA file

DDIC: Data dictionary RDAREA file

LOG: System log file

SPD: Synchronization point dump file

SSTS: Server status file

USTS: Unit status file

Hint

1. Generate a paired logical volume group for each server (or unit) that uses file classifications and files.
2. Position update-copy target files in a paired logical volume group in which the file classification matches the server (or unit) that uses files.
3. You cannot position files whose file classification does not match the server that uses files in the same paired logical volume group.

Correspondence relationship

1. A paired logical volume group consists of multiple paired logical volumes.
2. Each paired logical volume corresponds to a single paired volume.
3. Each paired volume corresponds to a single HiRDB file system area.
4. Multiple files can be stored in a single HiRDB file system area.