| 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>, Rod Taylor <pg(at)rbt(dot)ca>, "Bort, Paul" <pbort(at)tmwsystems(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Compression and on-disk sorting |
| Date: | 2006-05-16 21:50:22 |
| Message-ID: | 20060516215021.GC26212@pervasive.com |
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| Lists: | pgsql-hackers pgsql-patches |
On Tue, May 16, 2006 at 11:46:15PM +0200, Martijn van Oosterhout wrote:
> On Tue, May 16, 2006 at 12:31:07PM -0500, Jim C. Nasby wrote:
> > Does anyone have time to hack some kind of compression into the on-disk
> > sort code just to get some benchmark numbers? Unfortunately, doing so is
> > beyond my meager C abilitiy...
>
> I had a look at this. At first glance it doesn't seem too hard, except
> the whole logtape process kinda gets in the way. If it wern't for the
> mark/restore it'd be trivial. Might take a stab at it some time, if I
> can think of a way to handle the seeking...
Oh, do we need to randomly seek? Is that how we switch from one tape to
another?
It might be easier to switch to giving each tape it's own file...
--
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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