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Re: Data Pump and compress on the fly in Unix

From: Mark Brinsmead <pythianbrinsmead_at_gmail.com>
Date: Wed, 10 Jan 2007 20:35:22 -0700
Message-ID: <cf3341710701101935t182380b1rf0f33ea731b93a57@mail.gmail.com>


Here's a silly suggestion...

Have you tried a compressed filesystem? It's been some time since I used one myself (probably for exports or maybe archive logging with 9i and AIX4) and I quickly abandoned the technique because I found it to be incredibly slow. But it will probably work with expdp, providing the compressed filesystem still permits random I/O.

Of course, feasibility and performance of this option will probably vary greatly by platform...

Another alternative that might work -- at least for some platforms -- is the good ol' cheap-and-stinking-huge disk drive. You didn't say how big your database is, but with 750GB SATA disks costing a few hundred dollars and 1TB disks just around the corner, there should be ways you can find the space you need without spending a huge amount of money. Chances are, this will outperform most techniques involving (software) compression.

On 1/8/07, Leng Kaing <Leng.Kaing_at_hsntech.com> wrote:
>
> Hi all,
>
>
>
> I think the question has been asked before but I'm hoping that 10.2.0.3has changed things can we do a compress on the fly with expdb now? Ie.
> using mknod. Has anyone managed to get this to work?
>
>
>
> Ta,
>
>
>
> Leng.
>
>
>
> ------------------------------------------------------------------
>
> Leng Kaing
>
> Senior Oracle DBA
>
> Hansen Technologies; 2 Frederick St; Doncaster 3108
>
> Ph: +61-3-9840-3832
>
>
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-- 
Cheers,
-- Mark Brinsmead
   Senior DBA,
   The Pythian Group
   http://www.pythian.com/blogs

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Received on Wed Jan 10 2007 - 21:35:22 CST

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