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Hi, reading the below[1] on blkdeviotune made me wonder if we can dynamically change the values after the VM is already running using iotune. Is it supported? Thanks, Doron [1] https://fedoraproject.org/wiki/QA:Testcase_Virtualization_IO_Throttling

On 04/09/2014 08:02 AM, Doron Fediuck wrote: > Hi, > reading the below[1] on blkdeviotune made me wonder if we can dynamically > change the values after the VM is already running using iotune. > > Is it supported? Yes. 'virsh blkdeviotune' will do it (which makes calls to the underlying virDomainSetBlockIoTune() API). -- Eric Blake eblake redhat com +1-919-301-3266

...irtError: internal error Process exited while reading console log output: qemu-system-x86_64: -drive file=/mnt/tmpsdb/FileVM1,if=none,id=drive-ide0-1-1,format=raw,bps_rd=1048576: Invalid parameter 'bps_rd' Note - when i see dumpxml of the VM following lines are got added after setting the iotunes for read_bytes_sec <iotune> <read_bytes_sec>1048576</read_bytes_sec> </iotune> Please help me. Also i wanted to know whether we can set block IO tune for a VM using the above API. Is it same as the IO throttling provided by cgroup? -------------- next part...

Hi, I am running OpenStack Cluster and use libvirt + cgroup to limit vm’s performance https://wiki.openstack.org/InstanceResourceQuota What I am confusing is.. 1. After running a vm instance with some croup limit applied, I can’t find any related cgroup settings. 2. Can I change limit value after instance is running? like change disk_read_iops_sec from 10 to 20. One of the xml file like below.

Hi all, I use libvirt-go in my agent to attach rbd volumes. I ofen suffer the issue of incosistent of domain dump xml and domain persistent xml file. For example, when I try to attach volume, the the domain by ?virConnectListAllDomains? api from libvirt tell me the vdf or 0x0a is empty, but when attach it with the vdf device or 0x0a address, qemu return the error duplicated with vdf or PCI

On Tue, Oct 13, 2020 at 8:40 PM Richard W.M. Jones <rjones@redhat.com> wrote: > > On Tue, Oct 13, 2020 at 07:56:29PM +0300, Nir Soffer wrote: > > On Tue, Oct 13, 2020 at 7:15 PM Richard W.M. Jones <rjones@redhat.com> wrote: > > > > > > On Tue, Oct 13, 2020 at 06:45:42PM +0300, Nir Soffer wrote: > > > > I think this is the right solution - when

On Mon, Nov 09, 2020 at 09:16:33AM +0200, Yedidyah Bar David wrote: > On Wed, Oct 14, 2020 at 8:54 AM Yedidyah Bar David <didi@redhat.com> wrote: > > > > On Tue, Oct 13, 2020 at 8:40 PM Richard W.M. Jones <rjones@redhat.com> wrote: > > > > > > On Tue, Oct 13, 2020 at 07:56:29PM +0300, Nir Soffer wrote: > > > > On Tue, Oct 13, 2020 at 7:15 PM

On Wed, Oct 14, 2020 at 8:54 AM Yedidyah Bar David <didi at redhat.com> wrote: > > On Tue, Oct 13, 2020 at 8:40 PM Richard W.M. Jones <rjones at redhat.com> wrote: > > > > On Tue, Oct 13, 2020 at 07:56:29PM +0300, Nir Soffer wrote: > > > On Tue, Oct 13, 2020 at 7:15 PM Richard W.M. Jones <rjones at redhat.com> wrote: > > > > > > >

Hi, I'm trying to figure out what controls the number if in-flight virtio block operations when running linux in qemu on top of a linux host. The problem is that we're trying to run as many VMs as possible, using ceph/rbd for the rootfs. We've tripped over the fact the the memory consumption of qemu can spike noticeably when doing I/O (something as simple as "dd" from

Hi, I'm trying to figure out what controls the number if in-flight virtio block operations when running linux in qemu on top of a linux host. The problem is that we're trying to run as many VMs as possible, using ceph/rbd for the rootfs. We've tripped over the fact the the memory consumption of qemu can spike noticeably when doing I/O (something as simple as "dd" from

Hi all, I'm running a VM using libvirt+KVM and I have a disk performance issue. The host is the following: 4 cores Intel Xeon 5140@2.33 GHz, 16 GB of RAM, SATA HDD, OS Debian Wheezy, libvirt 0.9.12-11, QEMU-KVM 1.1.2+dfsg-2. The guest: 1 CPU, 2 GB RAM running Debian 7.0, image in compressed qcow2 format. When I try do run "dd if=/dev/zero of=io.test bs=32768k count=40" I get

Hi, is there a way to configure blkio via libvirt (xml)? Regards Erkan -- ?ber den grenzen mu? die freiheit wohl wolkenlos sein

Hi all, is there a way to limit the throughput (or the number of operations per seconds) of a block device? I ask because I've a couple of misconfigured VMs that are performing a lot of disk activity (swapping I'd bet but I haven't access to their OS). Since their storage is on a NFS share they are slowing down other VMs on the same share. Thank you. Davide.

On Mon, Aug 25, 2014 at 8:42 PM, Chris Friesen <chris.friesen at windriver.com> wrote: > I'm trying to figure out what controls the number if in-flight virtio block > operations when running linux in qemu on top of a linux host. > > The problem is that we're trying to run as many VMs as possible, using > ceph/rbd for the rootfs. We've tripped over the fact the the

On 08/26/2014 04:34 AM, Stefan Hajnoczi wrote: > On Mon, Aug 25, 2014 at 8:42 PM, Chris Friesen > <chris.friesen at windriver.com> wrote: >> I'm trying to figure out if there are any limits on how high the inflight >> numbers can go, but I'm not having much luck. >> >> I was hopeful when I saw qemu calling virtio_add_queue() with a queue size, >>

On 08/26/2014 04:34 AM, Stefan Hajnoczi wrote: > On Mon, Aug 25, 2014 at 8:42 PM, Chris Friesen > <chris.friesen at windriver.com> wrote: >> I'm trying to figure out if there are any limits on how high the inflight >> numbers can go, but I'm not having much luck. >> >> I was hopeful when I saw qemu calling virtio_add_queue() with a queue size, >>