more than one CPU in OpenVZ / KVM

[mlabenda]

I wonder, where i can change how much CPU's my machines get. Where are the KVM config files ? Can OpenVZ handle more than one CPU ?

 

[tom]

I wonder, where i can change how much CPU's my machines get. Where are the KVM config files ? Can OpenVZ handle more than one CPU ?

we will improve the admin inferface to set the number of CPU´s.

in the meantime, you can try to add the following to the config file (KVM):

nano /etc/qemu-server/xyx.conf

and add (eg. for 2 CPU´s) the following line:

smp: 2

changing this to already installed windows machine could be problematic (on the windows side) but should work on a fresh install - but no tested and approved yet.

 

[mlabenda]

Thank you

Was digging aroung and couldn't find the XML's
in ubuntu they used to be in a different place.

I just did some tests with ProxMox and vmware server 2.0beta2 (ubuntu)
and looks like proxmox is way faster on kvm (sure on OpenVZ) then vmware....

Great work guys

 

[typo3usa]

how many cpu's can we give an openvz server

I am interested in being able to give additional cpu's to a virtual server.
@ Present we have 3 servers in a cluster - and a bunch more to add.

Each server has 4 Quad Core Xeons - so 16 Cores to play with but the ability to only give a server 1 core is kinda stinkin...

I love the software thusfar - and if this is a limitation - hey great...
we can live w/ that for now.

Kind Regards,

 

[andrewg]

For KVM machines you can adjust the number of cpus post install via qm:

qm set VMID --smp 2

Where VMID is the vmid of the kvm machine (101,102, etc) and the number after --smp is the desired number of cores.
Note that SMP is not quite stable on Windows guests, haven't heard of any problems with linux.
Not sure how to adjust OpenVZ...?

 

[typo3usa]

great and for openvz?

I am wondering if OpenVZ matters to make the change...

The CPU scheduler In OpenVZ I believe ishttp://openvz.org/ two-level.

the first level scheduler decides which VPS/VE it is to give the CPU time slice to based on per-VE cpuUnit values.



The second level the standard linux process priorities and such

In a plane old OpenVZ system - an admin can set up different cpu-unites for different VE's and the CPU time will be given to those automatcially.



from what I understand there is a way to limit the CPU time for a VE - but not sure how to do that...



Perhaps someone could shed some light on this. ...

 

[dietmar]

unfortunaletly cpu resource controls are still not implemented in openvz 2.6.24.

- Dietmar

 

[typo3usa]

thanks

Thanks - that helps.
Been scratching my head a little trying to figure that out

Thanks again for a wonderful product.