Tom Lane wrote:

> > The article text refers to this 1977 S. B. Yao paper "Approximating
> > block accesses in database organizations" which doesn't appear to be
> > available online, except behind ACM's paywall at
> > 
> Well, a CACM citation is perfectly fine by my lights (especially one
> that's that far back and therefore certainly patent-free ...)
> Let's use something like this:
> See "Approximating block accesses in database organizations", S. B. Yao,
> Communications of the ACM, Volume 20 Issue 4, April 1977 Pages 260-261

That sounds nice all right, but I'm not sure it's actually helpful,
because the article text is not available anywhere.  I doubt most people
will spend 15 bucks to buy that paper ... so we don't actually know
whether the paper supports the chosen formula :-)  unless you have a
CACM subscription and can verify it.

I think it's good to have the ACM reference anyway, for posterity, but
it'd be good to (additionally) have something that people can read.

Álvaro Herrera      
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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