NAM: A Network Adaptable Middleware to Enhance Response Time of Web Services

Shahram Ghandeharizadeh, Christos Papadopoulos, Min Cai, Runfang Zhou and Parikshit Pol
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Shahram Ghandeharizadeh: University of Southern California, USA
Christos Papadopoulos: University of Southern California, USA
Min Cai: University of Southern California, USA
Runfang Zhou: University of Southern California, USA
Parikshit Pol: University of Southern California, USA

International Journal of Web Services Research (IJWSR), 2005, vol. 2, issue 4, 1-21

Abstract: Web Services is an emerging software technology that is based on the concept of software and data as a service. Binary and XML are two popular encoding/decoding mechanisms for network messages. A Web Service may employ a loss-less compression technique (e.g., Zip, XMill, etc.) in order to reduce message size prior to its transmission across the network, minimizing its transmission time. This saving might be outweighed by the overhead of compressing the output of a Web Service at a server and decompressing it at a client. The primary contribution of this paper is NAM, a middleware that strikes a compromise between these two factors in order to enhance response time. NAM decides when to compress data, based on the available client and server processor speeds and network characteristics. When compared with today’s common practice to transmit the output of a Web Service uncompressed always, our experimental results show NAM either provides similar or significantly improved response times (at times, more than 90% improvement) with Internet connections that offer bandwidths ranging from 80 to 100 Mbps.

Date: 2005
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