Re: compressed backup - is this a reasonable size

From: Riku Räsänen <>
Date: Wed, 22 Apr 2009 17:10:47 +0300 (EEST)
Message-ID: <>

It depends greatly.

I'd say on the average the compression is from 1:5 to 1:10, though I have seen compression of over 1:20.

Depends on the number of empty blocks (which RMAN does not read), how much repetition there is in the data and so on.

I'd say that from 17G to 3G is reasonable.

> Just ran the following command. This is our first RMAN backup. It backed
> up a 17G database into about 3G of files. Is this reasonable?????
> backup as compressed backupset database plus archivelog delete input;
> Backup states it finished normally.

Riku Räsänen
Kantamestarit Oy

Received on Wed Apr 22 2009 - 09:10:47 CDT

Original text of this message