Istituto di Informatica e Telematica     
Boldi P., Codenotti B., Santini M., Vigna S. UbiCrawler: a scalable fully distributed Web crawler. In: SOFTWARE-PRACTICE & EXPERIENCE (88346J0), vol. 34 pp. 711 - 726. John Wiley & Sons, Ltd, 2004.
We report our experience in implementing UbiCrawler, a scalable distributed Web crawler, using the Java programming language. The main features of UbiCrawler are platform independence, linear scalability, graceful degradation in the presence of faults, a very effective assignment function (based on consistent hashing) for partitioning the domain to crawl, and more in general the complete decentralization of every task. The necessity of handling very large sets of data has highlighted some limitations of the Java APIs, which prompted the authors to partially reimplement them
DOI: 10.1002/spe.587
Subject Web algorithmics
web searching
distributed algorithms
fault tolerance
G. Mathematics of Computing

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