HP 3PAR Operating System Software - Manual (Page 14)

2 Deciding on a Remote Copy Configuration
To decide on the best Remote Copy configuration for your
system, review illustrations and descriptions of the possible
configurations. • “Unidirectional 1-to-1 Configuration” (page 14)
• “Bidirectional 1-to-1 Configuration” (page 14)
• “N-to-1 Configuration” (page 15)
• “1-to-N Configuration” (page 16)
• “Synchronous Long Distance Configuration” (page 17)
Remote Copy configurations are based on the relationship between a pair of storage systems,
known as the Remote Copy pair. Within a Remote Copy pair, the primary storage system is the
system that holds the volumes that are copied to the backup storage system.
Unidirectional 1-to-1 Configuration
A unidirectional 1-to-1 Remote Copy configuration is composed of one Remote Copy pair. Each
storage system in the pair plays only one role: one system is the primary system, and one system
is the backup system.
In a unidirectional 1-to-1 configuration, the primary storage system holds only primary volume
groups, and the backup storage system holds only secondary volume groups.
Figure 1 Unidirectional 1-to-1 Remote Copy
Bidirectional 1-to-1 Configuration
A bidirectional 1-to-1 Remote Copy configuration is composed of one Remote Copy pair.
Each storage system in the pair function as both the primary and backup system, and both systems
contain both primary and secondary volume groups.
Therefore, each system provides backup for the other, according to the direction of replication set
for each volume group.
14 Deciding on a Remote Copy Configuration