Many Diff are there :
> Active/Active : It is the basically use for the default nodes, Here first node will be default and second node will be named instance. Both node will be active.
> Its Move group from cluster administration is possible for both side.
> System performance will go down, if both resources are in one node.
> Active/Passive : Its also basically use for nodes But in this case Only one Active node with default instance. No system performance degradation will be there for this case even if we switchover to the other node. Both have