RE: RMAN & BCV/Flashcopy Question?

Gene - Another thought. If your organization is large enough to have sophisticated backup, where RMAN really shines is managing many databases. The more the better the RMAN advantage.

     But if you have a working system and your organization is committed to the sophisticate backup hardware, then it probably wouldn't pay to change. Senior DBAs learn that sometimes the "right" answer isn't the "smart" answer.

Dennis Williams
DBA, 40%OCP, 100% DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com

-----Original Message-----
Sent: Friday, February 14, 2003 12:53 PM To: Multiple recipients of list ORACLE-L

Thanks Dennis for your suggestions. So it appears in my environment, I am best off sticking w/ my trusty hot backup scripts. Using RMAN for 3rd mirror splits doesn't appear to benefit me. Using RMAN to backup to a 3rd mirror would be less efficient than using EMC BCV or IBM Flashcopy, as these services are done internally, not at the os level.

>>> DWILLIAMS_at_LIFETOUCH.COM 02/14/03 11:44AM >>>
Gene - Hopefully someone will have better ideas than these, but I'll make a couple of suggestions.

   RMAN can issue SQL commands to your target database, so you could try having it issue the alter tablespace command. Then after you do the backup you could register the backup with RMAN. Almost more effort than it is worth.

   You might also consider using that extra disk space on the mirror as a backup site for RMAN -- backup to disk then move to tape. You could compare the various recovery scenarios and decide if this would enable you to recover faster than a hot backup.

Dennis Williams
DBA, 40%OCP, 100% DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com

-----Original Message-----
Sent: Friday, February 14, 2003 9:59 AM
To: Multiple recipients of list ORACLE-L

I plan on using a product from IBM called Flashcopy, similar to EMC's BCV (third mirror). Typically, I put the tablespaces in hot backup via scripting before splitting the third mirror. How can RMAN be used in a similar fashion? Can RMAN put the db in a hot backup state so the third mirror can be split and then backed up to tape?

Thanks,
Gene

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