Of course, one thing to note here is that there is not a separate product called RAC Extended Cluster. This is simply an implementation of RAC across a set of nodes that can be some distance from each other, where "some distance" is defined by the operating system capability of clustering nodes. Depending on the OS, this may be known under various names like campus cluster and so on. And one more thing to note - I see this offered up sometimes as a complete HA solution. RAC, by itself, is to me not a complete HA solution until you add something like DataGuard as well. But that's another discussion altogether. :) Pete "Controlling developers is like herding cats'" Kevin Loney, Oracle DBA Handbook "Oh no, it's not, it's much harder than that!" Bruce Pihlamae, long term Oracle DBA -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Pabba, Chandra Sent: Tuesday, 17 April 2007 6:22 AM To: MFontana@xxxxxxxxx; oracle-l@xxxxxxxxxxxxx Subject: RE: RAC Geographical Architecture May be he was referring to Oracle RAC Extended Cluster. Please see - http://www.oracle.com/technology/products/database/clustering/pdf/Extend edRAC10gR2.pdf to start with and for more information on Extended Clusters. HTH Thanks Chandra Pabba -- //www.freelists.org/webpage/oracle-l