We have two boxes located at two sites set aside for Grid control.

At the moment, we are running one as live, monitoring all the targets. The DR box is also up and running and in the event of a DR situation we will recongigure our 10G agents to point to the DR Grid box. DR monitors the live box and vice versa.

This poses some difficulties; any jobs etc, historical data will be lost in the event of DR.

As grid just uses an oracle database as its repository we are also considering using a standby database instead. in the event of DR, activate the database, possibly rename the box, start the grid coimponents and fingers crossed the agents will start talking to the DR box.
My concern is the agents will not fail over cleanly. Also, we have nothing monitoring whether the live box goes down, and would have to write a script to do this.

Does anyone have a similar setup or any advice? The documentation for Grid is a little thin.