Building Disaster Recovery Serviceguard Solutions Using Metrocluster with Continuous Access XP P9000 for Linux B.01.00.00

Figure 3 Sample configuration of Metrocluster with Continuous Access XP P9000 for Linux
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 12) depicts an example of two applications distributed in a Metrocluster with
Continuous Access XP P9000 for Linux 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 Metrocluster device group monitor provides the
capability to monitor the status of the device group used in a package. The Metrocluster device
group monitor, based on a pre-configured package parameter, also provides the ability to perform
automatic resynchronization of the XP or P9000 Continuous Access device group upon link recovery.
12 Introduction