Symantec™ ApplicationHA is based on VCS, and uses similar concepts such as agents, resources, and service groups. However, Symantec ApplicationHA has a lightweight server footprint that allows faster installation and configuration in virtualization environments.

The power of an expert integrated system is the combination of a virtualized, open architecture that provides choice along with deep integration, and dynamic and simple management from a single vantage point.

Key benefits include the following:

■ Out of the box integration with VCS.

■ Full visibility and control over applications, including the ability to start, stop, and monitor applications running inside guest domains.

■ High availability of the application as well as the virtual machine on which the application runs.

■ Graded application fault-management responses such as:

       Application restart

       ApplicationHA-initiated, internal reboot, or soft reboot of a virtual system

       VCS-initiated, external reboot or hard reboot of a virtual system

■ Failover of the virtual system to another VCS node.

■ Standardized way to manage applications using a single interface that is integrated with the Veritas™ Operations Manager (VOM) console.

■ Specialized Application Maintenance mode, in which ApplicationHA lets you intentionally take an application out of its purview for maintenance or troubleshooting.

ApplicationHA provides high availability of applications running on LPARs. Veritas™ Cluster Server (VCS) provides high availability of the logical partitions that run on the physical frame.

ApplicationHA is installed on the managed LPARs, and provides high availability to a configured application running on the managed LPARs. VCS is installed on the management LPAR. VCS provides high availability to the managed LPARs where the configured application runs.