RELIABILITY OF A SERVER SYSTEM WITH ACCESS RESTRICTION

摘要

As Internet has been greatly developed, the demand for improvement of the reliability of the Internet based system has been increased. The Internet based system is a system where a Web server receives various requests from clients through Internet, executes their request processing and returns results to clients. This paper considers a stochastic model where a server system has some access restriction. To prevent from errors, a server restores the state of the resource after a server completes the request processing at m times. The mean time to complete the request processing at m times is analytically derived. Further, an optimal policy which maximizes the expected profit is discussed. Finally, a numerical example is given.