Faiborz, If you have virtio-scsi configured for the VM, in ACS 4.12 and later iothreads will be configured based on the number of vCores you allocate to the VM. So if you have 4 cores, you'll have 4 iothreads.
The PR is here - https://github.com/apache/cloudstack/pull/3101 -Si ________________________________ From: Fariborz Navidan <mdvlinqu...@gmail.com> Sent: Monday, August 5, 2019 10:10 AM To: dev@cloudstack.apache.org <dev@cloudstack.apache.org> Subject: Does ACS utilizes or can utilize IOThreads on KVM hosts? Hello All, It sounds like IOThreads has a great effect on IO performance of KVM guests if configured correctly. Does ACS supports or utilizes this feature of QEMU and libvirt? Thanks
