2009/7/16 Stefan Knecht <knecht.stefan@xxxxxxxxx> > Some other things to consider that have not yet been mentioned > > - You can turn on flashback database for your physical standby, and > activate it to do your reporting or do tests (that write to the database), > or you can open it read only. For example you can do this during office > hours or at predefined times. Then, later on you flash it back and put it > back into recovery mode during the night. In the event of failure of the > primary site, you will have to apply all logs to bring the standby up to > date before you can switch over. So there's a tradeoff of using the > resources for reporting vs HA (switchover takes longer) > > - With 11g, you can even open the physical standby read only while it is in > recovery mode (take a look at the active data guard option) -- for some > environments, this may be reason enough to upgrade, as contrary to the > physical standby that you only open read only at a given point in time (and > therefore start lagging behind the primary) this is a near-realtime > reporting solution. > > Just my CHF0.02 :-) > > Cheers > > Stefan > commit :) I've tried to be 'release aware' in my comment, but of course, on each release all possible newer features should be used if you obtain a good benefit D.