The performance of servers is currently a major factor in the success of electronic commerce services. These services and applications integrate two well-known technologies into the server: web servers operate as an interface with the clients, and database servers provide the information required in the transactions. There are well-established benchmarking technologies for both kinds of servers...

some servers are to be located at nodes of a network. demand for services of these servers is located at each node and a subset of the nodes is to be chosen to locate one server in each. each customer selects a server with a probability dependent on distance and a certain amount of benefit is achieved after giving service to the customer. customers may waive receiving service with a known proba...

This paper considers a tandem queueing network with Poisson arrival process of incoming calls, two servers, and infinite orbits by the method asymptotic analysis. The servers provide services for calls exponentially distributed random times. Blocked customers at each server join orbit that retry to enter again after an time. Under condition low retrial rates, we prove joint stationary distribut...

Customers arrive to a single service queue according to a Poisson process with rate l, from which they are routed to two parallel heterogeneous and exponential servers whose ra.tes are 1'1 > #2· Customers are released from the system after service completion, according to their arrival order a requirement introducing additional resequencing delays. Customers which are delayed due to resequencin...