By Richard A. DeMillo (auth.), Gottfried Vossen, Darrell D. E. Long, Jeffrey Xu Yu (eds.)
This booklet constitutes the lawsuits of the tenth foreign convention on internet details structures Engineering, clever 2009, held in Poznan, Poland, in October 2009.
The 33 revised complete papers and 17 revised brief papers offered including keynote talks have been rigorously reviewed and chosen from round a hundred and forty four submissions. The papers are prepared in topical sections on internet computing, business consultation, tagging, semantics, seek, visualization, internet providers, belief and uncertainty, advice and caliber of carrier, person interfaces, internet knowing, exploiting constructions info on the net, structures, info mining and querying, querying and workflow and architecture.
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Additional info for Web Information Systems Engineering - WISE 2009: 10th International Conference, Poznań, Poland, October 5-7, 2009. Proceedings
Time (Hours in GMT) 14 20 26 32 38 44 Time (Hours in GMT) Utility Random 6000 Throughput (KB/s) Throughput (KB/s) Utility 2400 0 5000 4000 3000 2000 1000 0 Geo Utility 4000 3000 2000 1000 0 2 g. Geo 3200 8 14 20 26 32 38 44 Time (Hours in GMT) 2 h. 8 14 20 26 32 38 44 Time (Hours in GMT) Fig. 5. Average throughput obtained in client locations—(a) Paris; (b) Innsbruck; (c) Poznan; (d) Beijing; (e) Melbourne; (f) Atlanta; (g) Irvine; and (h) Rio de Janeiro Alike the perceived response time, end-users in China achieves the lowest throughput among all the client locations.
It is observed that users in Poznan enjoy the best average throughput, which is 9MB/s for geo-redirection. The reason is that the client machine is in a MAN network, which is connected to the country-wide Polish optical network PIONEER with high capacity channels dedicated to content delivery traffic. 3 MB/s for utility-redirection, due to the existence of better network path between the client and the MetaCDN replica infrastructure. This reasoning is deemed valid, since there are Mosso nodes in the same location.
It ranges in [0, 1] and provides an indication of the traffic activities. Formally, utility of a MetaCDN replica i is: ui = (2 / π ) × arctan(ξ ) (4) The main idea behind this metric is that a replica is considered to be useful (high utility) if it serves content more than it replicates, and vice versa. e. ξ = No of bytes serviced / No of bytes replicated (5) The resulting utility from (4) ranges in [0, 1]. The value ui=1 is achieved if the replica only serves content, without replicating (ξ=infinity).