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I don't get it, is the author talking about PageRank? http://en.wikipedia.org/wiki/PageRank http://en.wikipedia.org/wiki/PageRank What more does he want?
by stuff4ben 17y ago
I don't get it, is the author talking about PageRank? http://en.wikipedia.org/wiki/PageRank http://en.wikipedia.org/wiki/PageRank
What more does he want?
- minsight 17y agoThe algorithm used by Google today is light-years away from that described in the PageRank paper. It uses a form of PageRank, but it also uses many other parameters.
- spf 17y agoIf it's secret, then how can you be so sure? My impression is that PageRank, while initially extremely successful at filtering signal-from-noise, is very susceptible to manipulation. For example links farms which make unimportant pages seem important. As a result of such manipulation, Google started modifying their crawling, in order to reduce the amount of garbage going into PageRank (less garbage in, less garbage out). For example, they might look at the age and ownership in DNS records, and exclude domains that look fishy based on some heuristics. The spammers fought back with more tricks, and the resulting arms race has come to have an acronym: SEO. But the underlying idea of using an iterative approximation of the likelihood of encountering a page via a random walk of the web is preserved. (Some details here: http://www.miislita.com/information-retrieval-tutorial/matrix-tutorial-3-eigenvalues-eigenvectors.html http://www.miislita.com/information-retrieval-tutorial/matri...) If that's right (and I could well be wrong... would like to be convinced...), then I don't see it as a "light-years away" kind of issue, but rather a series of hacks to stay one step ahead of the spammers. I don't see any particular value in open sourcing those.
- mooism2 17y agoGoogle rankings are determined by much more than PageRank.