Re: RMAN duplicate only used blocks?
- From: Vishal Gupta <vishal@xxxxxxxxxxxxxxx>
- To: Brandon.Allen@xxxxxxxxxxx
- Date: Tue, 28 Jun 2011 17:15:16 +0100
This is my understanding as well. RMAN will decompress the unused blocks and
create an block for block copy on target database. I have not read/heard of
RMAN being able to restore only used block.
Regards,
Vishal Gupta
Email - vishal@xxxxxxxxxxxxxxx
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On 28 Jun 2011, at 17:10, Allen, Brandon wrote:
> I’ve never heard of such a feature, but would also be interested to hear if
> someone else knows about it. I’m guessing maybe the person that mentioned
> this to you was just confused about the fact that RMAN will only write used
> blocks to the backup set, but when it restores the backup, it fills in those
> unused blocks again. I’m pretty sure that duplicate works exactly the same
> as a regular restore – it just automates the other stuff for you like
> creating the controlfile, renaming datafiles, setting the new DBID, etc. I
> agree that it sounds like you’ll need to use data pump, unless maybe there is
> only a subset of tablespaces that you need – then you could use transportable
> tablespaces just for those, and you can use RMAN to create the transportable
> tablespaces if required to avoid downtime in the source database.
>
> Regards,
> Brandon
>
>
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