Hi Everyone,
We are using Open Nebula on Ubuntu 11.10. Our VM's usually never use a
whole system in the same time. But when they are active they usually
require huge amount of computational power.
OpenNebula has a protection from Overcommitment of memory and CPU. I
have a question: How can I manually setup Overcommitment by factor 2 for
CPU and Memory?
Significant amount of memory is helpful for our calculations but all
this extra memory is a caches. It means that nothing will be happen if
Cache size will be decreased for the VM. The cache can be dynamically
scale down by balloon driver which is a default for Libvirt and KVM in
Ubuntu.
It means that I absolutely sure that would like to over-commit memory.
There are no problem for a processor too. Our calculations took usually
several days and one day extra for one VM does not change anything.
I already used these scheme with over-commitment on Proxmox and it works
well.
Regards,
Max
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