With VCS 5.1SP1, we have introduced a new way to monitor applications within a cluster. This document helps explain the difference from traditional, legacy poll-based monitoring and the new intelligent monitoring framework. By removing the constant monitoring cycle needed in legacy clustering products, there is no additional CPU overhead. In addition, this framework provides instant notification to VCS when a resource goes offline. As a result, action is taken immediately instead of any delay caused by the timing of the monitoring process. With IMF, as soon as an application faults, VCS is alerted and it immediately takes action. Please review this whitepaper for more information.