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From Emmanuel Lecharny <>
Subject Re: [OT]Einstein was right ...
Date Thu, 29 May 2008 01:37:11 GMT
Howard Chu wrote:
> I wouldn't call query containment "garbage" - 
Garbage = to patent something which is prior art :)
> LDAP search queries can be pretty complex, and it certainly takes some 
> thinking to get caching right. Give credit where it's due. I don't 
> believe in software patents though; this is all pretty stupid. 
This was my point.
> And of course, Apurva's original implementation was pretty atrocious; 
> I had to rewrite about 95% of it before it would offer any performance 
> benefit over no cache at all.
> The second patent is essentially one step beyond syncrepl and other 
> similar replication mechanisms that have existed for many years. We've 
> had partial and fractional replication for ages. The difference that I 
> see here is that he's using query containment to decide to return a 
> referral to the master server, when a searched-for entry isn't present 
> in the replica. In our current implementations, if you ran such a 
> query against a partial replica, you'd just get no result back for the 
> missing entries. As patents go, it follows the standard formula - add 
> one step to an existing well known process and presto, you've invented 
> something new. Whether it's actually useful or not is a different 
> question - IMO, anything that relies on LDAP referrals is 
> fundamentally flawed anyway.
Thanks for the insight Howard !

I have some friends working in big telco companies, and they told me 
that their boni was partly based on the number of patents they register. 
This clearly leads to a ridiculous patent race.

We see the very same thing happening in the research area : if you don't 
publish, you don't exist. Thanks god, Ig Nobel has been created to grant 
the most stupid research papers... (have a look at this paper : 
Top of page 2 is simply hilarious :)

cordialement, regards,
Emmanuel L├ęcharny

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