Why would companies assess quality of service for VMs?


Generally, companies use quality of service (QoS) tools or address quality of service concerns for virtual machines and virtualization environments for the purposes of improving those environments, or for making workflows more effective and designing distributed systems in a more efficient way.

For example, exploring quality of service options for a set of virtual machines can help solve a “noisy neighbor” problem – a situation where a particular virtual machine takes up more resources than its neighbors and impacts the performance of other network components. Quality of service can be applied to specific systems such as Hyper-V storage, or used in the context of virtual machine clusters to show the load for each machine and other metrics. Cluster quality of service reports for virtual machines can help show demand on the machines over time, as well as where machines are located in the data center, CPU thresholds, memory thresholds and more.

In an overall sense, quality of service resources help to allocate resources in a more efficient way. They allow companies to do more with less in a virtual machine setup. Experts note that one alternative to quality of service work is the practice of over-provisioning, where companies simply throw more resources at a set of virtual machines to enhance performance. Obviously, quality of service work would lower costs for these sorts of situations. Vendors and other parties offer QoS tools and services to enterprise clients; for instance, Microsoft maintains a set of QoS resources for users.

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Justin Stoltzfus

Justin Stoltzfus is an independent blogger and business consultant assisting a range of businesses in developing media solutions for new campaigns and ongoing operations. He is a graduate of James Madison University.Stoltzfus spent several years as a staffer at the Intelligencer Journal in Lancaster, Penn., before the merger of the city’s two daily newspapers in 2007. He also reported for the twin weekly newspapers in the area, the Ephrata Review and the Lititz Record.More recently, he has cultivated connections with various companies as an independent consultant, writer and trainer, collecting bylines in print and Web publications, and establishing a reputation…