Re: Upgrade DB with no downtime

will it be ok to have read-only as "available" and do you have enough 
hardware to have both 8i/9i and 10g up and running?

Fernando

On May 26, 2004, at 7:45 PM, Ivan Chow wrote:

> Hi,
> Is there a way to leverage Oracle Data Guard or any other Oracle 
> technology
> to perform a database upgrade from 8i to 9i or 9i to 10G without any
> downtime? Currently it takes us anywhere from 8-12hrs to perform an 
> upgrade
> from 8i to 9i or 9i to 10G. The databases would remain unavailable 
> during
> the upgrade. Ideally, if possible, we would like the database to be
> available during the upgrade.
>

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