Mean Waiting and Turnaround Time for Multiple Web Transaction

Hyper Text Transfer Protocol (HTTP) is a transfer protocol used by the World Wide Web distributed hypermedia system to retrieve objects. HTTP is a connection-oriented protocol which uses TCP (Transmission Control Protocol) as the transport layer protocol. HTTP does not interact very well with TCP. In this paper, we study the factors that affect the performance of HTTP over TCP and the transaction times of TCP and T-TCP. We introduce two new performance criteria, mean waiting and turnaround times, as measures of Quality of Service (QoS) of multiple end users accessing web servers and develop the analytical models providing the theoretical upper bound for such QoS. Results from our proposed model match well with experimental data. The model can be applied to dimensioning of network link bandwidths and distribution of web servers to satisfy a given QoS to end users as measured by the mean waiting and turnaround times.