rman

Recovering an Oracle Database with Missing Redo

Background I ran into a situation where we needed to recover from an old online backup which (due to some issues with the RMAN “KEEP” command) was missing the archived redo log backups/files needed to make the backup consistent.  The client wasn’t concerned about data that changed during the backup, they were interested in checking…

Exploring Options of Using RMAN Configure to Simplify Backup

I am a simple person who likes simple things, especially RMAN backup implementation. I have yet to understand why RMAN backup implementation does not use configure command, and if you have a good explanation, please share. Examples for RMAN configure command configure device type disk parallelism 2 backup type to compressed backupset; configure channel device…

Oracle RMAN Restore to the Same Machine as the Original Database

Among the most critical but often most neglected database administration tasks is testing restore from backup. But sometimes, you don’t have a test system handy, and need to test the restore on the same host as the source database. In such situations, the biggest fear is overwriting the original database. Here is a simple procedure…

RMAN Infatuation?

Lately, I am becoming infatuated with RMAN again. Have you ever run “restore database preview”? Are you curious about how the recovery SCN are determined? Media recovery start SCN is 1515046 Recovery must be done beyond SCN 1515051 to clear datafile fuzziness If you are, then I will demonstrate this for you. RMAN LEVEL0 backup…

RMAN 12c : Say goodbye to your backup when dropping your PDB

Update: 09/March/2015 .- I wrote a second part and followed up on this on my personal blog RMAN 12cR1 : Say goodbye to your backup when dropping your PDB – Part II I was working on my presentations for IOUG Collaborate, and I came upon this strange behaviour in RMAN 12c (12.1.0.1.0) which to me, shouldn’t…

Duplication: divide et impera

For me, every Monday morning starts with the same routine. I refresh some QA databases from PeopleSoft production one. Even though the process is almost fully automated (all commands are automatically generated) it takes several hours to perform the final steps because DUPLICATE FROM ACTIVE DATABASE performs image copies to the destination server. I am…

Oracle Database 12c: Network Recovery in RMAN

Over the past 8 months, I have had the pleasure of working on a soon-to-be-released update for our popular Beginner’s Guide for Oracle Database 12c. Many of the new 12c features have fascinated me and my peers. I have thirsted in particular for the following handful of rman enhancements that are bundled with Database 12c…