Resource Hierarchies - SIOS

Shared Equivalencies
Shared Equivalencies
When you create an SPS resource hierarchy, you create the hierarchy initially on the primary server
and extend the hierarchy to a backup server. Most resource instances can be active on only one
server at a time. For such resources, SPS defines a second kind of relationship called a shared
equivalency that ensures that when the resource is in-service on one server, it is out-of-service on the
other servers on which it is defined.
In the example below, a shared equivalency exists between each hierarchy level on a pair of servers.
For example, the MSExch.0 resource exists on both servers, and there is a shared equivalency
between the two instances of MSExch.0 (just as there is between the one DNS instance and the two
volume instances).
SteelEye Protection Suite for Windows 9