Virtual Machine CPU weight

[godfather007]

Hello,

i'm considering a migration on my home-machine from Proxmox to Scale.
Before i'm making the step, i'm testing the possibilities of Scale and despite the different GUI options:

Is there a way to give a Virtual Machine less weight on the system? Let's say there is a VM with a higher core-count, could it be throttled so other VM's get more attention while needed?

Thanks in advance,
Martijn

 

[diogen]

Have you tried oversubscribing vCPUs for the VMs that potentially need it?

More information is needed about your hardware and VMs you are running...

 

[godfather007]

My machine is a 16 core xeon L on a supermicroboard with 256GB.
I understand what you're saying. Only my virtual router has enough when running 3 cores (1gbit fiber internet).
There's one beast used for transcoding video which should not take all available cpu-cycles and don't forget the zfs & lz4 cycles.

Maybe through command-line or vm-config file manually?

 

[godfather007]

Using proxmox there are config files: /etc/pve/qemu-server/101.conf:

where CPUunits is normally 1024, in this case higher

Code:

agent: 1
boot: order=sata0;net0;ide2
cores: 3
cpu: host
cpuunits: 2048
ide2: none,media=cdrom
memory: 2048
meta: creation-qemu=6.1.0,ctime=1636789915
name: LOC00
net0: virtio=6A:85:48:F3:87:E3,bridge=vmbr0
net1: virtio=86:45:66:4C:5D:C7,bridge=vmbr0,tag=107
net2: virtio=62:1E:9B:CD:28:C5,bridge=vmbr0,tag=111
net3: virtio=22:0E:DA:8B:3A:B5,bridge=vmbr0,tag=115
net4: virtio=E6:40:F0:48:BF:17,bridge=vmbr0,tag=116
net5: virtio=CE:24:91:59:96:B4,bridge=vmbr0,tag=124
net6: virtio=32:20:77:3E:D2:21,bridge=vmbr0,tag=125
net7: virtio=1E:3D:61:A9:AE:B3,bridge=vmbr0,tag=131
net8: virtio=20:e8:82:9b:d9:ef,bridge=vmbr1,tag=300
numa: 1
onboot: 1
ostype: other
sata0: NVME:vm-101-disk-0,cache=writeback,discard=on,size=10G
scsihw: virtio-scsi-pci
smbios1: uuid=7ba9e1cb-a4f5-475c-978f-5e1db4fbab69
sockets: 1
startup: order=1,up=60
vmgenid: dfc4aef3-6311-42d7-bec3-5680886d47e2

Whereas the resource-hungry machine receives just a piece of that (256):

Code:

agent: 1
boot: order=sata0;ide2;net0
cores: 16
cpu: host
cpuunits: 256
hostpci0: 0000:03:00,pcie=1,x-vga=1
ide2: none,media=cdrom
machine: pc-q35-6.1
memory: 8192
meta: creation-qemu=6.1.0,ctime=1637215275
name: PLEX01
net0: virtio=1E:64:A1:3F:EE:3A,bridge=vmbr0,firewall=1,tag=124
numa: 1
ostype: win10
sata0: NVME:vm-2480-disk-0,cache=unsafe,discard=on,size=40G
scsihw: virtio-scsi-pci
smbios1: uuid=563025d7-3eab-413c-b8e2-3682371d8222
sockets: 1
vga: none
virtio1: NVME:vm-2480-disk-1,cache=unsafe,discard=on,size=50G
vmgenid: 1c61f083-1037-43e1-a66a-dab5f0c6effe

 

[godfather007]

Looked into this thread and tried truecommand. Looks viewing only.