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Posted to dev@cloudstack.apache.org by Fariborz Navidan <md...@gmail.com> on 2019/08/05 15:10:14 UTC

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

Re: Does ACS utilizes or can utilize IOThreads on KVM hosts?

Posted by Simon Weller <sw...@ena.com.INVALID>.

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 <md...@gmail.com>
Sent: Monday, August 5, 2019 10:10 AM
To: dev@cloudstack.apache.org <de...@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