We've carried out some initial benchmarks on a production cluster running Windows Server 2016 Hyper-V with IOMeter and other various tools, and its looking pretty horrendous.
We are seeing disk io performance halve in VMs. Numbers like 60,000 IOPS and 2GB/s dropping to 30,000 IOPS and 1GB/s.
We're also seeing CPU utilisation related to disk IO almost triple on the hosts.
Dell PowerEdge R730's with dual Intel Xeon E5-2697 v4, lots of 10Gb NICs. Same VM just moved between unpatched and patched (plus new bios) hosts.
Storage is all network based which is the killer for us
Biting the hand that feeds IT
