RE: RMAN convert 5TB db on Linux (Little Endian) to AIX (Big Endian) - alternatives?
- From: "Taylor, Chris David" <ChrisDavid.Taylor@xxxxxxxxxxxxxxx>
- To: "'rodrigo@xxxxxxxxxxxxxxx'" <rodrigo@xxxxxxxxxxxxxxx>
- Date: Tue, 6 Mar 2012 11:13:22 -0600
Ah - no I have not *BUT* the idea did cross my mind about standing up a standby
instance on the AIX server if possible. I didn't go down that route though
thinking it wouldn't work.
I'll check out the article and see if that would be an option!
Thanks again
Chris Taylor
"Quality is never an accident; it is always the result of intelligent effort."
-- John Ruskin (English Writer 1819-1900)
Any views and/or opinions expressed herein are my own and do not necessarily
reflect the views of Ingram Industries, its affiliates, its subsidiaries or its
employees.
From: Rodrigo Mufalani [mailto:rodrigo@xxxxxxxxxxxxxxx]
Sent: Tuesday, March 06, 2012 11:05 AM
To: Taylor, Chris David
Cc: 'oracle-l@xxxxxxxxxxxxx'
Subject: Re: RMAN convert 5TB db on Linux (Little Endian) to AIX (Big Endian) -
alternatives?
Hi Chris,
Did you thougth about heterogeneous dataguard? Please check the Mike
Dietrich's blog post at
https://blogs.oracle.com/UPGRADE/entry/cross-platform_migration_using
Check MOSC Note ID 413484.1
https://support.oracle.com/CSP/main/article?cmd=show&type=NOT&doctype=BULLETIN&idA3484.1
Best Regards,
Rodrigo Mufalani
Oracle Ace Member
http://www.mufalani.com.br
[cid:~WRD233.jpg]
I was asked about converting a 5 TB 10.2 database on RHEL to a 11.2 database on
AIX.
As I was thinking through this, I understand that to do the conversion from
Linux to AIX the database would have to be
at the same version. So, I'd either have to upgrade prior to moving, or after.
Then I was thinking about the RMAN
conversion speed to convert from little endian to big endian and I think I
would have a problem due to the time
required.
I don't have access to the exact I/O throughput on the system but if I can
convert 4 GB in 14 minutes (stats taken
from a white paper) through RMAN, that's close to 1/3 GB per minute. So I could
do 1 GB = 3 minutes. (Should I expect
more than 1/3 GB per minute?)
So, if I have 1 TB (approx. 1000GB) that would 3000 minutes. Now if I have 5
TB, that's 15,000 MINUTES (!) to convert
through RMAN.
Is that really my only option (or best option anyway)?
What other options should I explore?
Chris Taylor
"Quality is never an accident; it is always the result of intelligent effort."
-- John Ruskin (English Writer 1819-1900)
Any views and/or opinions expressed herein are my own and do not necessarily
reflect the views of Ingram Industries,
its affiliates, its subsidiaries or its employees.
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