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2003
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Adaptive on-line page importance computation

9 years 10 months ago
Adaptive on-line page importance computation
The computation of page importance in a huge dynamic graph has recently attracted a lot of attention because of the web. Page importance, or page rank is defined as the fixpoint of a matrix equation. Previous algorithms compute it off-line and require the use of a lot of extra CPU as well as disk resources (e.g. to store, maintain and read the link matrix). We introduce a new algorithm OPIC that works on-line, and uses much less resources. In particular, it does not require storing the link matrix. It is on-line in that it continuously refines its estimate of page importance while the web/graph is visited. Thus it can be used to focus crawling to the most interesting pages. We prove the correctness of OPIC. We present Adaptive OPIC that also works on-line but adapts dynamically to changes of the web. A variant of this algorithm is now used by Xyleme. We report on experiments with synthetic data. In particular, we study the convergence and adaptiveness of the algorithms for various sch...
Serge Abiteboul, Mihai Preda, Gregory Cobena
Added 22 Nov 2009
Updated 22 Nov 2009
Type Conference
Year 2003
Where WWW
Authors Serge Abiteboul, Mihai Preda, Gregory Cobena
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