Re: Reserve CPU cores for specific guests?

[Zdenek Kaspar <zkaspar82@gmail.com>]

Neil Aggarwal napsal(a):
> Hello:
> 
> I don't think there is a way to do this with KVM, but
> I figured I would ask:
> 
> I want to be able to offer virtual private servers (VPSs)
> to clients.  I am going to use KVM for it.
> 
> I would like to offer clients the option to buy either:
> 1. A VPS which allows CPUs to be overcommitted.
> 2. A VPS with a dedicated CPU core.
> 
> So, for example, if I have a six core opteron, I might
> sell:
> 2 VPSs with a dedicated CPU core
> 6 VPSs which allow overcommitted CPUs
> 
> Since I need one core for the hypervisor, there would
> need to be a way to say that it gets a dedicated core
> plus the other 2 VPSs get a dedicated core.  That
> leaves 3 pooled cores to serve the 6 VPSs that 
> are allowed to overcommit.
> 
> Is there a way to set up a pooled set of cores
> for a given list of VPSs?  
> 
> I think I may have to use separate physical machine
> for the VPSs with dedicated cores and the ones with
> overcommitted ones.
> 
> Thanks,
> 	Neil
> 
> --
> Neil Aggarwal, (281)846-8957, http://www.JAMMConsulting.com
> CentOS 5.4 KVM VPS $55/mo, no setup fee, no contract, dedicated 64bit CPU
> 1GB dedicated RAM, 40GB RAID storage, 500GB/mo premium BW, Zero downtime
> 
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I think you can achieve that on some simple level DIY with taskset from
util-linux(-ng).

HTH, Z.