DACS: Dynamic allocation credit scheduler for virtual machines

Abstract

Virtual machines are used in various fields to increase the resource utilization. In a virtual machine monitor, I/O requests are the most frequent tasks for virtual machines. However, a virtual machine monitor cannot guarantee I/O responsiveness when multiple tasks are being performed on virtual machines. We propose a scheduling scheme that provides fast I/O responsiveness for virtual machines. The proposed scheme provides high resource utilization by dynamically allocating virtual resources to virtual machines according to the characteristics of their tasks. In experiments with virtual machines containing varying task characteristics, it is shown that the proposed scheme provides improved I/O responsiveness when compared to existing virtual machine schedulers. © 2017 ACM.