Question regarding the Migration of standalone 9i to 10g RAC

[vbeer]

Hi guys,

My company is planning to migrate one of 9i standalone DB to the new 10g RAC cluster. Due to the size of the standalone DB is big (120+ Gig) and large outage window is not possible. Hope you can guide and advise me the proper approache.

If I use IMP/EXP, it is not possible as it may take more than one or two days to finish the migration.

Do you guys know any proper procedure for this migration?

I have the following idea, but not sure whether it is possible.

1. Build the 10g RAC (CRS, Software and NEW RAC DB) on the clusters first.
2. cold backup the 9i DB to the new Cluster hosts.
3. Upgrade the cloned 9i DB to 10g standalone DB first (with Diff ORACLE_HOME location)
4. Use expdp and impdp to do schema TRANSPORTABLE TABLESPACE to the newly build 10g RAC.

If you have any best suggestions, please advise. Thank You so much.

Regards,
vbeer

[PAVB]

I just migrated standalone 9i to RAC 10g 130 Gig database using exp/imp in 14 hours, end to end.

Having your RAC environment already created...

1- Export/Gzip (on-the-fly) full, rows=n 9i database
2- Export/Gzip (on-the-fly) operational schema, rows=y
3- FTP *.gz files
4- Import/Gunzip (on-the-fly) FULL dump
5- Disable 10g constraints in operational schema
6- Import/Gunzip (on-the-fly) operational schema, skip=y
7- Gather fresh stats

[waitecj]

Are you using the same storage for your 10g solution (SAN), or are the storage arrays directly connected to the servers?

[vbeer]

Yes, Will be using SAN (NAS)

[vbeer]

Hi PAVB,

Due to the DB is OLTP DB, 14 hours outage is too much for Management point of view. I am still wondering whether any quicker method for the migration. I hope it would be within 8 hrs.

Best Regards,
Vbeer

[waitecj]

Yes, Will be using SAN (NAS)

So if you are using the same storage for your standalone 9i database and your 10g RAC, why are you moving data? Just pre-install your binaries, ensure you pass passed all the prerequisites (such as having a SYSAUX tablesapce) and upgrade...

[PAVB]

...are you suggesting reusing 9i datafiles -as they are, with 10g binaries?

Not gonna work... either you upgrade 9i to 10g or you exp from 9i and imp into 10g

[davey23uk]

course it will work, its how you upgrade database, during an upgrade the new software opens the old files and upgrades them

[PAVB]

Interesting.
I was under the impression dbua requires target 9i database to be already started -in Ora9i- during upgrade to 10g
Am I wrong?

[davey23uk]

you are wrong - anyway - dont have to use dbua