Table of Contents Author Guidelines Submit a Manuscript
Scientific Programming
Volume 2016, Article ID 4708195, 10 pages
Research Article

ANCS: Achieving QoS through Dynamic Allocation of Network Resources in Virtualized Clouds

Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea

Received 27 February 2016; Accepted 19 May 2016

Academic Editor: Zhihui Du

Copyright © 2016 Cheol-Ho Hong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


To meet the various requirements of cloud computing users, research on guaranteeing Quality of Service (QoS) is gaining widespread attention in the field of cloud computing. However, as cloud computing platforms adopt virtualization as an enabling technology, it becomes challenging to distribute system resources to each user according to the diverse requirements. Although ample research has been conducted in order to meet QoS requirements, the proposed solutions lack simultaneous support for multiple policies, degrade the aggregated throughput of network resources, and incur CPU overhead. In this paper, we propose a new mechanism, called ANCS (Advanced Network Credit Scheduler), to guarantee QoS through dynamic allocation of network resources in virtualization. To meet the various network demands of cloud users, ANCS aims to concurrently provide multiple performance policies; these include weight-based proportional sharing, minimum bandwidth reservation, and maximum bandwidth limitation. In addition, ANCS develops an efficient work-conserving scheduling method for maximizing network resource utilization. Finally, ANCS can achieve low CPU overhead via its lightweight design, which is important for practical deployment.