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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Backup for VLDB
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>From the sites I have worked at recently RMAN seems to be the way to go. It
certainly seems a lot more robust and reliable than it was in its earliest
release.
The 'normal' way of operation I have seen is either
Use a 3 way mirror, shut down the database, start up then shutdown normal,
then split one mirror. The database can then be restarted (total outage less
than 20 minutes)
The backup then takes place against the 3rd mirror and is a cold backup and
can be written to tape. The 3rd mirror is then synced or re-silvered at your
convenience after the backup is complete (5 hours later?).
One advantage of using this method is that the 3rd mirror is kept un-synced
all day until just before the backup ( we used EMC BCVs) and then merged.
Therefore there is a good copy of the database almost immediately available
that only needs 1 day's set of archive log applying in the event of a
recovery.
The other option is for hot backups, again using RMAN. Perhaps back up to disk and then archive to tape at your leisure. No downtime necessary
For the benefits of RMAn read an execllent essay by Tim Gorman of SageLogix - Is RMAN really worth the trouble. A link can be found from www.timonions.com <http://www.timonions.com> site
HTH John
John Hallas
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-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Hallas, John INET: HallasJ_at_logicae.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Fri Apr 06 2001 - 05:15:17 CDT
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