[one-users] Nice & Priority control on disk access

[Carlos Jiménez]

Hi all,

I have a server running OpenNebula 3.8 and acting as NFS server for 
storaging with another host (running KVM and acting as a NFS client for 
the storage). I have one VM running and then I try to create another VM 
using Sunstone. Then, the running VM reduces its performance while the 
creation of the new VM takes places. I guess OpenNebula I/O processes on 
the shared disk have better priority/nice/ionice than disk access of the 
already running VM.
The question is: Is there any way to control it so running VMs don't 
decrease their performance? How do you reduce priority/nice/ionice of 
the creation of the new VMs?

Thanks in advance,

Carlos.