Building Disaster Recovery Serviceguard Solutions Using Metrocluster with Continuous Access for P9000 and XP A.11.00

Figure 39 Applications Deployed in a 3DC DR Solution using Bi-Link Configuration
Node A
FC Switch
Sync
Replication
for B
Journal
Replication
for A
Journal Replication for B
Journal Replication for A
Continental Cluster
Metrocluster
Serviceguard
Cluster
Array
Node B
FC Switch
Array
Node A Node B
FC Switch
Array
A Continuous Access Synchronous device group pair must be established when using 3DC Sync/CAJ
replication to replicate data between the arrays at the application’s DC1 and DC2 sites. A
Continuous Access Journal device group pair must be established when using 3DC CAJ/CAJ
replication to replicate data between the arrays at the application’s DC1 and DC2 sites. Figure 39
(page 105) depicts both the applications configured using 3DC Sync/CAJ replication and 3DC
CAJ/CAJ replication. You can also have all the applications using only 3DC Sync/CAJ replication
or all the applications using only 3DC CAJ/CAJ replication in a 3DC environment based on your
requirements. A Continuous Access Journal device group pair must be established either between
DC1 and DC3 or between DC2 and DC3 to replicate data to application’s DC3 site.
When Continuous Access Journal device group pair is configured between DC1 and DC3, the
data is replicated always in Multi-Target topology from DC1. This configuration is called Multi-Target
Bi-Link configuration.
3DC DR Solution Configuration 105