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

Figure 3 Sample configuration of Metrocluster for Linux for P9000 Continuous Access
Quorum Server
Router Router
Node 1 Node 2 Node 3 Node 4
Site 1 Site 2
XP Array XP Array
Synchronous /
Asynchronous /
Journal
Metrocluster
A B
NOTE: The P9000 disk array family does not support asynchronous replication using side file.
Figure 3 (page 16) depicts an example of two applications distributed in a Metrocluster with
Continuous Access for P9000 and XP environment balancing the server and replication load. In
this example, Site1 is the primary site for application A, and recovery site for application B. Site2
is the primary site for application B, and recovery site for application A.
Overview of Metrocluster Device Group Monitor
In a Metrocluster environment, when you are not actively monitoring the device group state, it is
difficult to find out the time when the application data became remotely unprotected for an extended
period of time. Under these circumstances, the P9000 or XP/Continuous Access device group
monitor provides the capability to monitor the status of the P9000 or XP/Continuous Access device
group used in a package. The P9000 or XP/Continuous Access device group monitor, based on
a pre-configured environment variable, also provides the ability to perform automatic
resynchronization of the P9000 or XP/Continuous Access device group upon link recovery.
16 Introduction