On the feasibility of geographically distributed web crawling.

We identify the issues that are important in design of a geographically distributed Web crawler. The identified issues are discussed from a "benefit" and "challenge" point of view. More specifically, we focus on the effect of geographical locality of Web sites on crawling performance, and, as a practical study, investigate the feasibility of a distributed crawler in terms of network costs. For this purpose, we conduct various experiments to collect network access statistics about the servers in the educational domains of eight different countries (USA, Canada, Chile, Brazil, Spain, Portugal, Turkey, and Greece). We gather the statistics from four different sites located in USA, Brazil, Spain, and Turkey using echoping. The results favor geographically distributed Web crawling in terms of crawling throughput.