Building Disaster Recovery Serviceguard Solutions Using Metrocluster with EMC SRDF

For information about EMC SRDF, see the document EMC® Symmetrix®Remote Data Facility
Product Guide available at EMC documentation website.
Overview of solution for Metrocluster with EMC SRDF
Overview of a Metrocluster configuration
A Metrocluster is configured with the nodes at Site1 and Site2. When Site1 and Site2 form a
Metrocluster, a third location is required where Quorum Server or arbitrator nodes must be
configured. There is a EMC Symmetric disk array at each site and they are connected to each
other through SRDF links.
An application is deployed in a Metrocluster by configuring it at both the sites. The sites are referred
either as primary or recovery site for an application, based on their role. Typically, the application
runs on the primary site. If there is a disaster in the primary site, the application automatically fails
over to the recovery site.
For each application, either synchronous or asynchronous data replication is configured to replicate
data between the two sites using SRDF device group. In a typical configuration, more than one
application is configured to run in a Metrocluster. Depending on the application distribution in a
Metrocluster environment, some applications can have Site 1 as its primary site while some other
applications can have Site 2 as its primary site.
10 Introduction