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Re: QUESTION: Estimating required rman incremental backup size from redo??

From: Jerome Vitalis <vitalismanREMOVETHAT_at_gmail.com>
Date: Wed, 26 Apr 2006 10:30:57 +0200
Message-ID: <pan.2006.04.26.08.30.47.475000@gmail.com>


On Tue, 25 Apr 2006 12:07:56 -0700, BD wrote:

> I can tell how much redo my Prod database generates for a certain day,
> but is there any correlation between that value, and the size that the
> same day's incremental rman backup is likely to be?

No. There can't be any correlation because if the same block has been updated n times since the previous backup level (let's say the whole block is updated n times), there would be n sets of changes in the redo stream whereas there would be only one block image in the incremental backup.

Jérôme Received on Wed Apr 26 2006 - 03:30:57 CDT

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