Logical Standby Database Question

  • From: "Mark Strickland" <strickland.mark@xxxxxxxxx>
  • To: oracle-l@xxxxxxxxxxxxx
  • Date: Thu, 1 Jun 2006 19:40:46 -0700

Environment: 10.1.0.3 RAC on Solaris 5.9, 3-way cluster.  Physical standby
database on separate server.  Using Data Guard Broker.

We're about to add a logical standby database to our production environment
to offload reporting.  Question is, do we want to feed the logical standby
directly from the primary or cascade the redo through the physical standby
to the logical standby.  I've tested both approaches and haven't encountered
any technical gotches.  Has anyone implemented a cascaded approach and did
you run into any surprises, problems, or undocumented features?  It makes
sense to me to do a cascaded approach in order to keep the additional
redo-shipping load off the primary database.  Any reasons not to do that?
Things we should consider?

Regards,
Mark Strickland
Seattle, WA

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