Re: rman incremental merge

On 12/4/06, Don Seiler <don_at_seiler.us> wrote:
>
> The usage that I've seen and used is to start with a level 0, and from
> there on out you'd only take level 1 incrementals. Then, based on
> your recovery window, you could roll your base backup image forward,
> for example to 7 days ago, if that is your window. It saves you the
> time of not having to do another level 0, but having a recent level 0
> image to start with for recovery.

The recovery of course depends on whether the incremental was a differential or cumalitive incremental. Cumalitives give faster backup performance than differentials, but cause longer restoration times. This is assuming that there is > 1 incremental level 1+ between level 0.

The reason I stopped using it is that you HAVE to do a backup COPY. I
> didn't have the disk to hold an actual copy, and needed to have
> compression.
>
>

Somehow I have missed that part. I have backed up and restored databases from incremental 0 and 1, but have not had to do any backup COPY.

Can you point to a relevant doc?

-- 
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist

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