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

Question

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.

Thanks,

Alex

Answer 1

Hi,

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,
Anne

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