Markus Wanner wrote:
On 07/20/2010 09:05 PM, Alvaro Herrera wrote:
Hmm, deriving code from a paper published by IBM sounds like bad news --
who knows what patents they hold on the techniques there?
Yeah, that might be an issue. Note, however, that the lock-based
variant differs substantially from what's been published. And I sort
of doubt their patents covers a lot of stuff that's not lock-free-ish.
There's a fairly good mapping of what techniques are patented and which
were only mentioned in research in the Sun dynamic memory patent at
http://www.freepatentsonline.com/7328316.html ; that mentions an earlier
paper by the author of the technique Markus is using, but this was from
before that one was written. It looks like Sun has a large portion of
the patent portfolio in this area, which is particularly troublesome now.
--
Greg Smith 2ndQuadrant US Baltimore, MD
PostgreSQL Training, Services and Support
g...@2ndquadrant.com www.2ndQuadrant.us
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