Does enabling Storage QoS on an Hyper-V Failover Cluster impact the hosts' performance?

Alessio P 66 Reputation points

Does enabling Storage QoS on an Hyper-V Failover Cluster impact the hosts' performance? And if yes, how much?

We're facing some performance issues managing the hosts of an Hyper-V Failover Cluster where the Storage QoS is enabled directly on the VHDx of multiple VMs (on about 40 VMs of a total of 110) and we want to be sure the issue is not caused but QoS itself.



A Windows technology providing a hypervisor-based virtualization solution enabling customers to consolidate workloads onto a single server.
2,575 questions
Windows Server Clustering
Windows Server Clustering
Windows Server: A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.Clustering: The grouping of multiple servers in a way that allows them to appear to be a single unit to client computers on a network. Clustering is a means of increasing network capacity, providing live backup in case one of the servers fails, and improving data security.
963 questions
0 comments No comments
{count} votes

Accepted answer
  1. Xiaowei He 9,876 Reputation points


    Yes, enable Storage Qos on Hyper V VHD will take some memory and CPU resources on the host to optimize the storage performance, so the Host performance has some side effects.

    However, it's hard to say how much...

    Thanks for your time!
    Best Regards,


    If the Answer is helpful, please click "Accept Answer" and upvote it.

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

0 additional answers

Sort by: Most helpful