Re: RMAN 10g

On Tue, 21 Dec 2004 10:08:41 -0000, Howard Latham <howard.latham_at_rsmb.co.uk> wrote:
>
> Anyone have real experience of the compression ratio with rman on 10g to
> disk ?
> My 300 gig database seems to be backed up into 40gig - Yes I know
> I could validate it but it gobbles CPU and took 11 hours to do the
> backup so I
> just want a reality check!
>
> The manual says 2 to 4 times.
>
> And Yes I also know I have to test recovery sometime but that will be
> out of
> Hours !
>
> Oh and Happy Christmas to you all
>
> Howatd Latham

Hey! Don't you know you have to test your recovery? ;)

Anyway, in 9i we'd sometimes use RMAN hot disk backups to clone databases to locations across the WAN. We compressed the backups to save bandwidth. The 300 gig database would end up compressed to around 40 to 60 gigs using gzip. Someone else mentioned that 10g is using gzip, so your values don't seem out of line.

Steven Patenaude

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