International Journal of Computer Applications |
Foundation of Computer Science (FCS), NY, USA |
Volume 42 - Number 18 |
Year of Publication: 2012 |
Authors: John P. Sahlin, Shahram Sarkani, Thomas Mazzuchi |
10.5120/5792-8097 |
John P. Sahlin, Shahram Sarkani, Thomas Mazzuchi . Optimizing QoSin Distributed Systems / Cloud Computing Architectures. International Journal of Computer Applications. 42, 18 ( March 2012), 14-20. DOI=10.5120/5792-8097
The primary challenge of cloud service providers is finding ways to maintain a high degree of Quality of Service (QoS) in a cost-effective manner to ensure either profitability (for business-based cloud service providers) or cost avoidance (for government cloud service providers). The traditional approach to improving system performance is to upgrade the servers and/or network backbone, an expensive undertaking. The authors used OPNET Modeler to represent distributed system architecture supporting a variety of application services and defined a framework for measuring QoS from the end-user's perspective and discovered that there is no direct relationship between server/network upgrades and overall QoS in distributed systems. This framework can be used as a decision support tool for cloud service providers to optimize the QoS of their systems by choosing upgrade strategies that provide the greatest "bang for the buck. "