Comments on: HOWTO: Oracle Cross-Platform Migration with Minimal Downtime

By: kjnaby

kjnaby — Sun, 27 Nov 2011 08:59:55 +0000

Is it possible to migrate from AIX to solaris. My disk are controlled by Oracle grid. ASM disk .

By: Rafael

Rafael — Mon, 13 Dec 2010 12:12:58 +0000

Hello,

If i’m not wrong seems that in some cases is possible to use DataGuard to change server hardware as mentioned in this metalink note:

Data Guard Support for Heterogeneous Primary and Physical Standbys in Same Data Guard Configuration [ID 413484.1]

If your combination is supported the downtime is the one related to switchover.

What think about this, any have tried this?

Thanks

By: uv

uv — Thu, 04 Nov 2010 10:55:30 +0000

Don,
Good info, you haven’t shown that you ran the RMAN convert script to convert the UNDO tablespaces, doesn’t UNDO need conversion even when the ‘endian format’ is same across platforms.

So, should I deduce that you pre-created the UNDO t/s in your target DB? Please clarify.

Thanks

By: DBRAY

DBRAY — Thu, 27 May 2010 16:38:51 +0000

Great sharing!
I am going to migrate the 10gRAC on ASM from Linux (small endian) to AIX (big endian) on the same Oracle version and ASM.
I wonder if the ASM DG can be mounted on both platform and can be open by the AIX instances.
Is anyone know if the endian info is written in the ASM files?
In your case, there is a NFS that can be read by both platforms. Can you share how the archivelog generated by the Solaris platform can be read in Linux? any conversion on the archivelog needed?
Thanks,

By: Newbie

Newbie — Mon, 03 May 2010 04:57:04 +0000

Hello All,
If I am doing migration from HP UX 11.11 to IBM AIX, Would I able to create RMAN restore/recover database and just shutdown and start database on AIX. It has difference in Endian that is why I asking. I have approx 5 downtime window and 2TB database size.

Any and all input are appreciated.

Thank you in advance.

By: Don Seiler

Don Seiler — Mon, 26 Apr 2010 18:45:23 +0000

oraboy: No I don’t believe that you can’t just edit the pfile to change the block size. To change the block size you’ll need to create a new database with the new blocksize and exp/imp the data.

By: Raj Laxman

Raj Laxman — Tue, 13 Apr 2010 13:46:29 +0000

Very good information. Thanks for sharing.

By: oraboy

oraboy — Thu, 08 Apr 2010 19:37:22 +0000

very nice.. thanks for sharing.

if the new database is to have a different block size (apart from all the other you have already covered)..I am thinking its just taken care during the pfile edit (after CREATE PFILE FROM SPFILE) stage. That should bring the new database in diff block size? Is that correct? or would it break anything?

Thanks

By: Kamran Agayev

Kamran Agayev — Wed, 31 Mar 2010 04:49:45 +0000

Dear Don. Nice article!

I’ve demonstrated Disaster Recovery process with video tutorial. You can get it from the following link:
http://kamranagayev.wordpress.com/2010/03/29/rman-video-tutorial-series-performing-disaster-recovery-with-rman/

Thanks

By: Lukas

Lukas — Thu, 18 Mar 2010 00:27:25 +0000

I’m facing similar exercise Windows32bit -> Linux 64bit. I’m thinking about using datapump over a db link to do full import on the target system, therefore getting the migration done in single step (hopefully:).
Are there any caveats one might have against/for that approach?
I’ll post the my experience once I have a chance to try it out.