Oracle dataguard question

Hi,
oracle version : oracle 9i
I have primary database and one logical standby and one physical standby database, if something goes wrong to primary for which one is it logical or physical i need to failover. and which one feasible.
Thanks
Prakash GR
Edited by: prakashdba on Aug 19, 2009 7:12 PM
Edited by: prakashdba on Aug 19, 2009 7:13 PM

To add to Justin's point :
1. You must confirm if the Logical Standby is for every schema and every object that you have in the Primary. If it doesn't apply every SQL from the Primary, it isn't a full replica.
I would think that a Logical Standby would be built for a subset of the objects (tables) in the Primary -- e.g. for the reporting purposes that Justin mentions.
2. You must also consider how "lag" between the Primary and the two Standbys is configured. Whether archivelogs from the Primary are applied immediately -- to both standbys or to one earlier than the other (because lag is configured). Obviously, you would consider using the one with the more recent data !
3. When you do failover, you (management / users) must be aware of what the lag, if any, is between the standby and the primary -- what data may not have arrived at the standby.

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=======
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S~

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