The Experts below are selected from a list of 6705 Experts worldwide ranked by ideXlab platform
C. Shah - One of the best experts on this subject based on the ideXlab platform.
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web file transmission by object packaging performance comparison with http 1 0 and http 1 1 Persistent Connection
Local Computer Networks, 2003Co-Authors: Hiroshi Fujinoki, M. Sanjay, C. ShahAbstract:Recently, the largest concern for corporate owners of Web servers is how to minimize the response time. In order to minimize the response time, a new efficient file transmission technique for World-Wide-Web, called Web file transmission by object packaging, is proposed. The prototype design and preliminary performance evaluation of object packaging have been presented in the 27th conference on local computer networks. In this paper, the performance of object packaging is compared to HTTP 1.0 and HTTP 1.1 Persistent Connection in terms of the server and client response time and CPU workload by experiment method. It is found that object packaging reduces the response time and CPU workload at the server by up to 92.0 and 91.1% from HTTP 1.0 and 64.5 and 82.4% from HTTP 1.1 Persistent Connection, respectively. From the results of the experiments, it is found that object packaging will be an efficient technique to minimize the response time in transferring web files. The results of the experiments also suggest the significance of disk I/O overhead for Web servers in high speed networks.
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LCN - Web file transmission by object packaging - performance comparison with HTTP 1.0 and HTTP 1.1 Persistent Connection
28th Annual IEEE International Conference on Local Computer Networks 2003. LCN '03. Proceedings., 1Co-Authors: Hiroshi Fujinoki, M. Sanjay, C. ShahAbstract:Recently, the largest concern for corporate owners of Web servers is how to minimize the response time. In order to minimize the response time, a new efficient file transmission technique for World-Wide-Web, called Web file transmission by object packaging, is proposed. The prototype design and preliminary performance evaluation of object packaging have been presented in the 27th conference on local computer networks. In this paper, the performance of object packaging is compared to HTTP 1.0 and HTTP 1.1 Persistent Connection in terms of the server and client response time and CPU workload by experiment method. It is found that object packaging reduces the response time and CPU workload at the server by up to 92.0 and 91.1% from HTTP 1.0 and 64.5 and 82.4% from HTTP 1.1 Persistent Connection, respectively. From the results of the experiments, it is found that object packaging will be an efficient technique to minimize the response time in transferring web files. The results of the experiments also suggest the significance of disk I/O overhead for Web servers in high speed networks.
K.f. Law - One of the best experts on this subject based on the ideXlab platform.
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Site-based mapping for parallel proxy servers with fewer TCP Connections
IEEE Network, 2004Co-Authors: Kin-yeung Wong, Kai-hau Yeung, K.f. LawAbstract:Many mapping schemes for parallel proxy servers have been proposed in previous research. The operations of these schemes are mainly URL-based, and therefore cannot fully benefit from the new Persistent Connection feature of HTTP/1.1. In this article we propose a site-based mapping scheme that forwards all requests targeting the same Web site to the same proxy server. This allows a proxy to leave the TCP Connections open between consecutive operations so as to avoid the costs of multiple open and close Connections to the remote servers. Simulation results show that the proposed site-based scheme reduces 40-70 percent of Connection setups and teardowns compared to conventional URL-based mapping schemes.
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ICDCS Workshops - Site-based mapping for parallel proxy servers with fewer TCP Connections
Proceedings 22nd International Conference on Distributed Computing Systems Workshops, 1Co-Authors: Kin-yeung Wong, K.f. Law, Kai-hau YeungAbstract:There are many mapping schemes proposed in previous research on parallel proxy servers. The operations of these schemes are mainly URL-based, and therefore cannot fully benefit from the new Persistent Connection feature of HTTP/1.1. We propose a site-based mapping scheme that forwards all requests targeting on the same Web site to the same proxy server. The scheme then allows the proxy to use a single Persistent Connection to serve many client requests. The major advantage of the scheme is the reduction in the number of Connection establishments. This reduction can save network bandwidth and reduce the user-experienced latency. Simulation results show that the proposed site-based scheme reduces 40%-70% of the Connection setups and teardowns when compared to a traditional URL-based mapping scheme.
Alain Choussat - One of the best experts on this subject based on the ideXlab platform.
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Isolation of the right subclavian artery.
The Annals of Thoracic Surgery, 1992Co-Authors: Eugène Baudet, J. P. Guibaud, Xavier Roques, Nicole Laborde, Alain ChoussatAbstract:Abstract Loss of continuity between subclavian artery and aorta with Persistent Connection to the homolateral pulmonary artery through a ductus arteriosus is an uncommon malformation, involving generally the left subclavian artery and associated with intracardiac or aortic arch anomalies. We report a case of right subclavian isolation with a left-sided aortic arch, presenting as a single anomaly and surgically corrected by aortic reimplantation.
Guo Cheng-cheng - One of the best experts on this subject based on the ideXlab platform.
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Measure of Distance Among Web Pages Based on Markov Chain
Computer Engineering, 2008Co-Authors: Guo Cheng-chengAbstract:The Persistent Connection characteristic of HTTP/1.1 may bring extra cost to Web server cluster with content-aware request distribution.To reduce such cost, the Web pages always being accessed by clients in the same session are organized into Web page clusters, and Web page clusteris viewed as a document distribution unit. How to measure the distance among Web pages is a key problem of Web page clustering. This paperproposes a measure of distance among Web pages based on Markov chain, which considers the time correlation of clients’ access and the path ofclients’ access. Example shows that, compared with the measure of distance among Web pages based on time correlation, adopting such measure canmore effectively reduce the extra cost brought by the Persistent Connection of HTTP/1.1 after clustering Web pages.
Kin-yeung Wong - One of the best experts on this subject based on the ideXlab platform.
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Site-based mapping for parallel proxy servers with fewer TCP Connections
IEEE Network, 2004Co-Authors: Kin-yeung Wong, Kai-hau Yeung, K.f. LawAbstract:Many mapping schemes for parallel proxy servers have been proposed in previous research. The operations of these schemes are mainly URL-based, and therefore cannot fully benefit from the new Persistent Connection feature of HTTP/1.1. In this article we propose a site-based mapping scheme that forwards all requests targeting the same Web site to the same proxy server. This allows a proxy to leave the TCP Connections open between consecutive operations so as to avoid the costs of multiple open and close Connections to the remote servers. Simulation results show that the proposed site-based scheme reduces 40-70 percent of Connection setups and teardowns compared to conventional URL-based mapping schemes.
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ICDCS Workshops - Site-based mapping for parallel proxy servers with fewer TCP Connections
Proceedings 22nd International Conference on Distributed Computing Systems Workshops, 1Co-Authors: Kin-yeung Wong, K.f. Law, Kai-hau YeungAbstract:There are many mapping schemes proposed in previous research on parallel proxy servers. The operations of these schemes are mainly URL-based, and therefore cannot fully benefit from the new Persistent Connection feature of HTTP/1.1. We propose a site-based mapping scheme that forwards all requests targeting on the same Web site to the same proxy server. The scheme then allows the proxy to use a single Persistent Connection to serve many client requests. The major advantage of the scheme is the reduction in the number of Connection establishments. This reduction can save network bandwidth and reduce the user-experienced latency. Simulation results show that the proposed site-based scheme reduces 40%-70% of the Connection setups and teardowns when compared to a traditional URL-based mapping scheme.