TSPITR using backups from standby

Hi,
I would like to ask for your opinion/advice regarding the following
scenario. We have a primary 10.2.0.3 RAC database which has a physical
standby database, both sites being managed through dataguard. Every
night full RMAN backups are taken for the primary and standby
databases. Between the primary and standby sites we do not have any
shared storage like NFS or SAMBA (because of the problems mentioned
into Note:413098.1).
Now, as far as I know, backups of datafiles/archives taken from the
standby can be used on primary, am I right? So, what I would like to
achieve is to perform a TSPITR of one particular tablespace by taking
a backup control file from the primary but using datafile copies and
archives from the standby. And of course, because I don't want to load
too much the primary, the auxiliary instance should be located on the
standby machine. Is this possible? Has anybody tried this before?
Many thanks!
talek.

if you are on 10.2.0.3, check this document and make use of Incrementally Updated Backups: Rolling Forward Image Copy Backup
http://download-east.oracle.com/docs/cd/B19306_01/backup.102/b14192/bkup004.htm
You can restore datafiles backedup from physical standby
can restore archivelogs created on physical standby
but can not use control file from standby to recover on primary
You should be able to use bakcup from a physical standby and recover any tablespace in Point In Time on priamry prvovided you have a backup/datafile copy before and archives untill that time.

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channel prmy1: starting datafile copy
input datafile file number=00001 name=/u01/data/DGSTD/datafile/system01.dbf
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input datafile file number=00002 name=/u01/data/DGSTD/datafile/sysaux01.dbf
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ARC2: Cannot archive online log based on backup controlfile
ARC3: Cannot archive online log based on backup controlfile
ARC2: Cannot archive online log based on backup controlfile
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Edited by: user12281508 on Jun 1, 2011 10:26 AM
Edited by: user12281508 on Jun 1, 2011 10:28 AM

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TSPITR using backups from standby

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