| From: | "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com> |
|---|---|
| To: | Martijn van Oosterhout <kleptog(at)svana(dot)org> |
| Cc: | Andrew Dunstan <andrew(at)dunslane(dot)net>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Compression and on-disk sorting |
| Date: | 2006-05-15 20:14:36 |
| Message-ID: | 20060515201436.GL26212@pervasive.com |
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| Lists: | pgsql-hackers |
On Mon, May 15, 2006 at 10:09:47PM +0200, Martijn van Oosterhout wrote:
> > In this case the problem is that we want to tell the OS "Hey, if this
> > stuff is actually going to go out to the spindles then compress it. And
> > by the way, we won't be doing any random access on it, either." But
> > AFAIK there's no option like that in fopen... :)
>
> posix_fadvise(). We don't use it and many OSes don't support it, but it
> is there.
There's an fadvise that tells the OS to compress the data if it actually
makes it to disk?
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
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