Re: Data Pump and compress on the fly in Unix
- From: "Mark Brinsmead" <pythianbrinsmead@xxxxxxxxx>
- To: Leng.Kaing@xxxxxxxxxxx
- Date: Wed, 10 Jan 2007 20:35:22 -0700
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@xxxxxxxxxxx> 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.
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Leng Kaing
Senior Oracle DBA
Hansen Technologies; 2 Frederick St; Doncaster 3108
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Cheers,
-- Mark Brinsmead
Senior DBA,
The Pythian Group
http://www.pythian.com/blogs
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