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Re: RMAN Duplication for Migration and Archived Logs

From: Don Seiler <>
Date: Tue, 7 Aug 2007 14:54:28 -0500
Message-ID: <>

A friend also suggested that I might be able to do something similar using Oracle Streams Replication to minimize downtime.

I've only just begun the Streams reading, but thought I'd ask some questions to get a jump-start:

  1. Are there any known hang-ups going from 32-bit to 64-bit?
  2. Does Oracle Streams include sequences, or does it just do table DDL/DML changes?
  3. Does Oracle Streams propagate VPD changes?

If any of these are "no", then I think it's out. One not-so-appalling option would be to do as I did when I migrated from HPUX to RHEL: create a new database, recreate pl/sql, tables and indexes (with better organization than I have currently), have a perl script to recreate users and privileges. The appeal here is that the large bulk (90%) of my ~1TB database is read-only on that day and could be migrated (probably via datapump) well ahead of the downtime window. Then during the downtime window I'd run a script to recreate the sequences and VPD settings, then datapump the OLTP stuffs over to get the DML for the day.

What do you fine folks think? Doing it the hard way?


On 8/2/07, Don Seiler <> wrote:
> On 8/1/07, Alex Gorbachev <> wrote:
> > The simple approach is to create a standby database. I think it should
> > work 32 bit -> 64 bit as well.
> I just found this in Section 2.3.1 of the Data Guard Concepts and
> Administration Guide [1]:
> "All members of a Data Guard configuration must run an Oracle image
> that is built for the same platform.
> For example, this means a Data Guard configuration with a primary
> database on a 32-bit Linux on Intel system can have a standby database
> that is configured on a 32-bit Linux on Intel system. However, a
> primary database on a 64-bit HP-UX system can also be configured with
> a standby database on a 32-bit HP-UX system, as long as both servers
> are running 32-bit images."
> Has anyone proven this wrong? Are my standby plans ruined?
> [1]
> --
> Don Seiler
> oracle:
> ultimate:

Don Seiler
Received on Tue Aug 07 2007 - 14:54:28 CDT

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