Control of servers in a two node queueing network

Server control in a two-node Markovian queueing network with a limited total number of servers is considered. Two problems have been studied; the first problem is to find a quasi-steady-state control policy for a periodic review of server allocation. This policy can be regarded as a feedback control policy to adapt the network parameter changes by changing the number of servers at each node.The second problem (main problem of this research) is that of on-line server control. Two policies for this control are proposed. The first policy allocates the servers to each node according to the network state and is preemptive. Markovian models have been used for analysis. We found that the performance of the network (mean number or mean time in the network) using this policy can be improved significantly (reductions up to about 50%) and this performance is affected by the ratio of the service rates. The form of the best policy is defined. The second policy allocates the server(s) to each node according to a rule based on the ratio between queue lengths and is non-preemptive. Simulation is used to study the performance in a few cases. We found that the performance is improved by similar amounts.

Name thesis:degree_name

Master of Engineering (M.Eng.)

Level thesis:degree_level

Master's

Discipline thesis:degree_discipline

Engineering, Electrical

Grantor dc:publisher

Carleton University

Year dc:date.issued

1978

Author dc:creator

• Elweheby, Soad

Statement dc:rights

• Copyright © 1978 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.

Language dc:language.iso

en

DOI

10.22215/etd/1978-12746

OAI identifier oai:identifier

oai:carleton.scholaris.ca:20.500.14718/29729