If you have a working DB, why upgrade?

If you have a working db, don't try to upgrade even if your local Oracle sales man says. Why? Because you will have new problems during upgrade...

Hi Mark,
Its DB, but the story a little bit long, not just one bug, i will try summarize it.
source db - 10.2.0.3 RAC on rhel 4, ocfs2 900GB datafiles
target db - 11R2 RAC on rhel 5.5 ASM
- I could't stop source db ( as usual 7/24 db )
- First I tried data pump over network, tere is some bugs on 10.2.0.3 data pump can't export it (we have to upgrade db to 10.2.0.4 but i can't)
- Second I tried old export import tool, but could't do it i got "snapshot too old error" during export o LOB tables!
- Then RMAN Backups, I could't use costumer rman backups
-as usual they were making backups but not testing them - When i tried it, it was not working , end of restore operation I had "system01.dbf file restored from older backup please restore it from newer backup" error but there is only one backup.
-I Changed backup script and make too many cleaning in catalog, then we have a new internal error, 10.2.0.3 has a bug, if a datafile grows during rman backup backup crashing.
After all I talked with managers to stop db for one day maintance, then called storage experts (copiying over network is too slow) and during one day stop we changed the new storage configuration ( it was raid 1 and raw for ASM)
- Setup 10.2.0.1
- upgrade 10.2.0.3
- copy datafiles to their orgial path in new storage
- run db ( happy day)
- upgrade it to 10.2.0.4
- set up grid
- set up 11r2
- upgrade to 11r2 using option move datafiles to ASM
- surprise Upgrade could't do it because of some bugs. (I tried to set up new db on asm there was no problem with ASM or grid)
- Decided to upgrade 11gr2 single instance and make datapump export ( after 1 day it gave error about file size, so tried to split the dmp files)
- set up an empty working rac db
- tried to import dmp files
finally i got that error -> 11gR2 impdp parallelism (don't use. It has a bug!!)

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