From: | Allan Engelhardt <allane(at)cybaea(dot)com> |
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To: | Bruno Wolff III <bruno(at)wolff(dot)to> |
Subject: | Re: Still wondering about random numbers... |
Date: | 2001-08-07 21:07:59 |
Message-ID: | 3B7058AF.90B08250@cybaea.com |
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Lists: | pgsql-general pgsql-patches |
Bruno Wolff III wrote:
> On Tue, Aug 07, 2001 at 04:36:23PM +0000,
> Thomas Lockhart <lockhart(at)fourpalms(dot)org> wrote:
> >
> > configure is our friend. A better random number generator is always
> > welcome imho, and if it can be reliably supported through autoconf then
> > it would stand a chance to be included in the main tree. Especially
> > since the usage of random() seems to be very isolated in the code.
> > contrib/ is always a good first step though...
>
> 'Better' is in the eye of the beholder. /dev/random can stall for
> very long periods of time waiting for entropy.
On Intel i8x0 motherboards you can set the CONFIG_INTEL_RNG kernel parameter and access the hardware random entropy generator.
On other motherboards, reading from /dev/random can stall indefinitely. This is not a Good Thing. /dev/urandom is fine, but not rally better than rand(3) or random(3).
Is it actually possible to replace the built-in function? I haven't checked.
If it is, then contrib is a fine place for the improvement. If it isn't, then configure is probably our friend.
Just my £0.02.
Allan.
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