Specifications

Active - Standby Grouping
AppB and AppC, however, have several grouping options because all four servers have access to the
AppB and AppC shared resources. AppB and AppC could also be configured to failover to Server1
and/or Server2 as a third or even fourth backup system.
Note: Because LifeKeeper applies locks at the disk level, only one of the four systems connected to
the AppB and AppC disk resources can have access to them at any time. Therefore, when Server 3 is
actively processing AppB, those disk resources are no longer available to Servers 1, 2, and 4, even
though they have physical connections.
Active - Standby Grouping
In an active/standby pair configuration, the primary server is processing, and the back-up servers are
standing by in case of a failure on the primary server. The standby systems can be smaller, lower-
performance systems, but they must have the processing capability to assure resource availability
should the primary server fail.
SteelEye Protection Suite for Linux43