small off topic but also related to db_unique_name: I have noticed when existing DG configuration is integrated into Oracle Restart i.e. on one server runs primary on second standby, both DB's have db_unique_name defined (e.g. db01 and db02), on standby server Oracle Restart start standby database with SID=db_unique_name and not (as it should be) with SID=db_name. Anyone else has observed the same? Any thoughts? thanks, goran On Fri, May 27, 2011 at 10:37 PM, Emre Baransel <ebaransel@xxxxxxxxx> wrote: > Hi > Before 11gR1 it's not mandatory to use different db_unique_name on primary > and standbys. Dataguard 11g admin guide says: > > Oracle Data Guard release 11g ensures each database's DB_UNIQUE_NAME is > different. After upgrading to 11g, any databases with the same > DB_UNIQUE_NAME will not be able to communicate with each other. > > Y. Emre Baransel > > > ------------------------------ > *From:* K R <kp0773@xxxxxxxxx> > > *To:* Oracle-L@xxxxxxxxxxxxx > *Sent:* Tuesday, May 24, 2011 9:47 PM > *Subject:* db_unique_name > > All, > > I have the primary db on server A , and planning to make the standby on > server B. Can I have the db_unique_name same same as db_name in standby > database.? > > appreicate any suggestion. > > thanks > Kart > > > > > > >